eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
145
155
10.22059/ijhst.2018.245221.210
67119
Genetic Diversity of Pear (Pyrus spp) Germplasm Assessed by Simple Sequence Repeat (SSR) and Morphological Traits
Mohammad Mehdi Sharifani
mmsharif2@gmail.com
1
Tetsuya Kimura
t-kimura@bio.mie-u.ac.jp.
2
Toshiya Yamamoto
toshiya@affrc.go.jp
3
Chikako Nishtani
chikako@affrc.go.jp
4
Horticulture Department Gorgan University of Agricultural Sciences
National Center for Seeds and Seedlings, Tsukuba, Ibaraki 305-0852, Japan
National Institute of Fruit Tree Science, Tsukuba, Ibaraki 305-8605, Japan
National Institute of Fruit Tree Science, Tsukuba, Ibaraki 305-8605, Japan
This study was conducted to identify and recognize relations and diversity among accessions of the Iranianpears (Pyrus spp). A total of 34 pear accessions, derived presumably from at least six species, were subjected to simple sequence repeat (SSR) analysis. The Japanese and the Chinese pear samples were; “Housui” and “Yali” cultivars, example of Pyrus pyrifolia and P. bretschneideri, respectively. Some European pears and Iranian germplasm were analyzed. Seven SSR markers (KU10, BGA35, BGT23b, NH011b, NH013a, NH004a and NH015a) were used for the analysis. One hundred six visible amplified fragments (putative alleles) acquired for 34 pear samples NH011b and NH015a loci exhibited high heterozygosities of 0.82 and 0.79, respectively. BGA35 produced eight putative alleles, while NH013a created 22 putative alleles. The average value of allele per locus was 15. A phenogram was constructed based on the similarity-matrix data using the unweighted pair-group and arithmetic average methods. There was no association between the SSR and morphological phenograms. This work revealed relatedness of Iranian pear samples to the four species of P. communis, P. syriaca, P. salicifolia, and P. glabra.
https://ijhst.ut.ac.ir/article_67119_4b698f170aeec7b072a2b8b2da5364fd.pdf
Genetic diversity
Persian pear
Pyrus
simple sequence repeats
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
157
166
10.22059/ijhst.2018.252636.222
66747
Biological and Agronomical Characteristics of Local and Introduced Plum (Prunus domestica L.) Cultivars in Georgia
Elene Maghlakelidze
emaghlakelidze@yahoo.com
1
Zviad Bobokashvili
2
David Maghradze
3
Department of Perineal Crops, Scientific-Research Center of Agriculture, Georgia, Tbilisi.
Head of Department of Horticulture and Viticulture, Scientific-Research Center of Agriculture.Tbilisi, Georgia, Tbilisi.
Head Department Institute of Horticulture, Viticulture and Oenolog, Grapevine and Fruits Germplasm Research, Genetics and Breeding Georgia, Tbilisi.
Plum local varieties and forms are widespread in all regions of Georgia. Despite the wide dissemination of this crop, the number of cultivars is not quite a lot. Due to this reason, study of cultivars has been carried out in a collection plot of the Scientific-Research Center of Agriculture, in village Jighaura. Eight plum (Prunus domestica L.) cultivars including: Amers, Bluefree, Chanchuri, Empresss, President, Stanley, Shaviqliavi, Tophit were used in this study. The following agronomic and biological characteristics were studied for the cultivars: calendar periods of phenological phases, pomological description of fruits, fruit chemical analysis and productivity. The results showed that average time of maturity was from 02.08. to 30.09. The average fruit yield in this trial for Empress and President Stanley cultivars was 88.4- 98.1 kg per tree. The weight of fruit ranged from 58.4 g to 26.2 g. The cultivars Tophit, Empresss and President contain the highest contents for soluble solid substance – respectively 14.23%, 12.81%, 12.64%. According to the obtained results, the following cultivars of plum can be chosen for further cultivation which can improve the local assortment of plum like Tophit and President (fresh production), Empress and Stanley (fresh/dry production). They are characterized by early starting production, high-productivity and high quality of fruits.
https://ijhst.ut.ac.ir/article_66747_500d50e43c6ee0a08928cc87d479dc79.pdf
Flowering
fruit size
ripening time
yield
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
167
182
10.22059/ijhst.2018.252004.217
66748
Genetic Diversity and Population Structure of Iranian Tulips Revealed by EST-SSR and NBS-LRR Markers
Ali Pourkhaloee
alipourkhaloee@yahoo.com
1
Morteza Khosh-Khui
mkhoshkhui@yahoo.com
2
Paul Arens
paularens@wur.nl
3
Hassan Salehi
hsalehi@shirazu.ac.ir
4
Hooman Razi
razi@shirazu.ac.ir
5
Ali Niazi
niazi@shirazu.ac.ir
6
Alireza Afsharifar
alirezaafsharifar@yahoo.com
7
Jaap Van Tuyl
jaapvantuyl@wur.nl
8
Ph.D. Student, Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran.
Department of Horticulture, Faculty of Agriculture, Shiraz University, Shiraz, IR IRAN
Department of Plant Breeding-Wageningen University
Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran.
Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz University, Shiraz, Iran
Institute of Biotechnology, Shiraz University, Shiraz, Iran.
Department of Plant Protection, College of Agriculture, Shiraz University, Shiraz, Iran.
Department of Plant Breeding, Wageningen University, Wageningen, the Netherlands.
The genus Tulipa L. (Liliaceae) comprises about 100 species and Iran is considered as one of the main origins of tulips. In this research, genetic diversity and population structure of 27 wild populations of tulips collected from Iran were studied by 15 highly polymorphic and reproducible expressed sequenced tag-simple sequence repeat (EST-SSR) markers and 8 nucleotide binding site (NBS)-enzyme combinations. According to EST-SSR genotyping, the average of gene diversity (GD) and polymorphism information content (PIC) were 0.66 and 0.62, respectively. However, the values of GD and PIC were equal for each NBS primer–enzyme combination which ranged between 0.85-0.95 with a mean value of 0.91. The mean value of resolving power (EST-SSR = 1.93; NBS-LRR = 17.39) indicated that the NBS markers had higher discriminatory power compared to the EST-SSR markers. UPGMA clustering confirmed the results of PCA which was further confirmed by Bayesian model-based STRUCTURE analysis. Population structure analysis detected 3 and 4 gene pools for 27 wild tulip germplasms with EST-SSR genotyping and NBS-LRR profiling, respectively. The AMOVA results indicated that molecular variation among populations (ΦPT = inter-population variation) was 82% and 93% of the total variation for EST-SSR and NBS-LRR markers, respectively. The results of this study will help the conservation and phylogenetic studies of tulips.
https://ijhst.ut.ac.ir/article_66748_25b513e1e7333876b1db0d2c2d502e57.pdf
Bulbous crop
Genetic marker
Motif-directed profiling
Population genetics
Tulipa spp
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
183
191
10.22059/ijhst.2017.241714.205
66749
Sharka (Plum pox virus): A Forgotten Disease in Iran
Azam Nikbakht Dehkordi
azam.nikbakht.dehkordi@gmail.com
1
Nadali Babaeian
n.bagheri@sanru.ac.ir
2
Sajede Karimpour
s.karimpour@yahoo.com
3
Pedro Martinez-Gomez
pmartinez@cebas.csic.es
4
Manuel Rubio
mrubio@cebas.csic.es
5
Nadali Bagheri
nbabaeian@yahoo.com
6
Sari University of Agricultural Sciences and Natural Resources. Sari, Islamic Republic of Iran
Sari University of Agricultural Sciences and Natural Resources. Sari, Islamic Republic of Iran
Department of Horticulture, Ferdowsi University of Mashhad, Islamic Republic of Iran
Department of Plant Breeding, CEBAS-CSIC, P.O. Box 164, 30100 Espinardo, Murcia, Spain.
Department of Plant Breeding, CEBAS-CSIC, P.O. Box 164, 30100 Espinardo, Murcia, Spain
Sari University of Agricultural Sciences and Natural Resources. Sari, Islamic Republic of Iran.
Plum pox or sharka, a viral disease caused by Plum pox virus (PPV), severely affects the production of Prunus species in Europe. The first evidence of sharka was reported in Iran in 2000 . Due to the economic impact of this disease on crop production, recent advances in the term of biology, epidemiology, and disease management are provided in this paper to assure awareness among growers and professionals involved in Prunus production. This study will provide fundamental knowledge about this virus to guaranty the successful detection and controlling of sharka disease in Iran.
https://ijhst.ut.ac.ir/article_66749_a30a0ec7b39eab7356f9e5dc978cf415.pdf
Breeding sharka disease
control
detection
Potyvirus
Prunus
PPV
Resistance
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
193
204
10.22059/ijhst.2017.232756.190
66750
An Evaluation of the Phytochemical Properties of some Pomegranate Cultivars During Fruit Development and Ripening
Hossein Meighani
hmeighani@ujiroft.ac.ir
1
Mahmood Ghasemnezhad
ghasemnezhad@guilan.ac.ir
2
Davood Bakhshi
bakhshi-d@guilan.ac.ir
3
Assistant Professor, Department of Horticultural Science, Faculty of Agriculture, University of Jiroft, Jirot, Iran.
Associate Professor, Department of Horticultural Science, Faculty of Agriculture, University of Guilan, Rasht, Iran.
Associate Professor, Department of Horticultural Science, Faculty of Agriculture, University of Guilan, Rasht, Iran.
The pomegranate fruit is a good source of bioactive compounds. The present study has investigated the biochemical and sensory characteristics of the arils of four Iranian commercial pomegranate cultivars namely Malase Shirine Saveh (MSS), Malase Torshe Saveh (MTS), Alak Shirine Saveh (ASS) and Agha Mohammad Ali (AMA) for several developmental and ripening stages during 45–180 days after fruit set (DAFS). The results showed that the total soluble solids (TSS), individual and total anthocyanin concentrations, and color parameters including chroma and a* values significantly increased, in contrast, the total phenolic concentration and color parameters (L* and hue angle) gradually decreased during developmental stages. Six anthocyanin pigments were found responsible for the red color of pomegranate juice. The quantity and the quality of the anthocyanin pigments were different among the cultivars and the various developmental stages. The predominant anthocyanin pigment at all developmental stages in all cultivars was cyanidin 3,5-diglucosides. The maximum total phenolic concentration was recorded at 45 DAFS for all cultivars. The highest antioxidant activity was recorded at 45 DAFS, and gradually decreased until 135 DAFS. Similar decrease was observed in total phenolic and flavonoid concentrations. Notably, increasing of antioxidant activity at the late-developmental stage was due to induction of the flavonoids and anthocyanins accumulation.
https://ijhst.ut.ac.ir/article_66750_397038a284a2e1d0664d4858ad146365.pdf
Anthocyanins
Antioxidant activity
Color parameters
phenolic compounds
pomegranate
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
205
216
10.22059/ijhst.2017.208537.127
66753
Anatomy of Salvia limbata in Relation to Altitudinal Gradient in West Azerbaijan (Iran)
Fatemeh Nejadhabibvash
f.nejadhabibvash@urmia.ac.ir
1
Esmaeil Rezaei Chiyaneh
ismaeil.rezaei@gmail.com
2
Alireza Pirzad
a.pirzad@urmia.ac.ir
3
Assistant Professor, Department of Medicinal Plant, Higher Education Center of Shahid Bakeri of Miandoab, Urmia University, Urmia, Iran.
Assistant Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia University, Urmia, Iran
Associated Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia University, Urmia, Iran
This study was conducted to investigate the effect of altitudinal gradients on the anatomy of Salvia limbata C.A.Mey. (Lamiaceae). . The S. limbata species were collected from their natural habitats from various regions of West Azerbaijan province in Iran. The thickness of cuticle, collenchymas, phloem, xylem and pith of stem and leaf thickness were measured. Moreover, width, length and number of stomata on both adaxial and abaxal epidermal surfaces were analyzed. Statistical analyses were done on a completely randomized design. The results indicated that by increasing altitude leaf thickness increased from 239.1 to 300.1 µm. Number of leaf epidermal cells was also increased in higher altitude on both upper (4.30 to 5.61) and lower (1.05 to 6.55) epidermal surfaces. The results confirmed that more stomata on both adaxial and abaxial epidermis in high altitude samples were associated with presence of narrower and longer stomata on their leaves. Significant differences in the cuticle, collenchyma, xylem, phloem and parenchymatous pith thickness in the stem were observed in all the six studied populations. At higher altitudes thicker cuticle, increased number of collenchyma and wider xylem, phloem and parenchymatous pith were detected. Plants in Mahlamlu region had the thickest studied parameters and Plants in Kabudan Island region had the thinnest tissues.
https://ijhst.ut.ac.ir/article_66753_9d351f7a84f1d8f7969020c98aec1cb8.pdf
altitude
Anatomy
Lamiaceae
Salvia limbata
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
217
228
10.22059/ijhst.2017.229916.185
66756
Impact of Salicylic Acid on Phenolic Metabolism and Antioxidant Activity in Four Grape Cultivars During Cold Storage
Ghader Habibi
gader.habibi@gmail.com
1
Department of Biology, Payame Noor University (PNU), Iran
Salicylic acid (SA) plays an important role in the regulation of plant ripening and responses to abiotic stresses. In this study, the protective effect of SA on cold stress-caused oxidative damage in grape (Vitis vinifera L.) bunches was investigated during cold storage. Grape bunches treated with 2 mM SA and stored at 0°C with 85-90% RH for 30 days. Samples were selected from each treatment for physical and chemical analysis before storage, midpoint of storage, end of storage and end of shelf life. The results showed that the cold storage induced lipid peroxidation, decay incidence and loss of fresh weight, while SA pretreatment mitigated these effects in “Bidaneh Sefid” and “Qzl uzum” cultivars. In these cultivars, SA-induced protection against cold damage was accompanied by decrease in malondialdehyde (MDA) content, and caused an increase in catalase (CAT) and superoxide dismutase (SOD) activity. Additionally, SA-induced protection against cold injury was mediated through promoting total phenolics concentration and phenylalanine ammonia-lyase (PAL) activity. The present findings suggest that although variability in the protective effect of SA against cold damage was observed between grape cultivars, SA could alleviate the cold-induced oxidative stress in grape bunches during cold storage.
https://ijhst.ut.ac.ir/article_66756_fb6811c058bc26122b45dc45c83e677f.pdf
Cold stress
grape cultivars
Lipid Peroxidation
phenylalanine ammonia-lyase
Salicylic Acid
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
229
237
10.22059/ijhst.2017.228954.182
66759
Pollinizer Influence on Fruit Quality Traits in Japanese Plum (Prunus salicina Lindl.)
Sadegh Barzamini
sadeghbarzamini1991@gmail.com
1
Reza Fotouhi Ghazvini
.fotouhi@gmail.com
2
Department of Horticultural Sciences, Faculty of Agriculture, University of Guilan, Rasht, Iran
Department of Horticultural Sciences, Faculty of Agriculture, University of Guilan, Rasht, Iran
Most Japanese plum-type cultivars are self-incompatible and therefore cross pollination is necessary to ensure fruit set. Moreover, pollen can directly affect fruit development process and quality. This study was carried out to investigate the effect of 6 pollen sources (‘Goje Sabz’, ‘Simka’, ‘Shablon’, ‘Methley’, ‘Myrobalan’ and ‘Black Star’) on fruit quantitative and qualitative characteristics of Prunus salicina cultivar ‘Black Star’, and identify the most effective pollinizer in the north region of Iran. The results showed that the pollen sources significantly affected different fruit characteristics such as fruit set, length, diameter, fresh weight, dry matter content and firmness. In contrast, total soluble solid, pH, total acid, vitamin C and total phenol did not significantly affect by pollen sources. Furthermore, it was found that the highest fruit set, physical dimensions, fresh weight and dry matter content were achieved when ‘Simka’ was used as pollen source. Finally, these results suggest that the pollen sources had xenia effects in Japanese plum and ‘Simka’ is the most suitable pollen source for Japanese plum ‘Black Star’ cultivar.
https://ijhst.ut.ac.ir/article_66759_d1eba9adb0f07b95b65e0d75260c75db.pdf
fruit set
plum
pollination
self-incompatible
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
239
250
10.22059/ijhst.2018.241208.206
66761
Resistance and Vegetative Growth Analysis of some Olive Cultivars in Response to a Defoliating Pathotype of Verticillium dahliae Kleb
Seyed Javad Sanei
sa_nei@yahoo.com
1
Seyed Esmael Razavi
razavise@gau.ac.ir
2
Department of Plant Protection, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
Department of Plant Protection, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
Verticillium dahliae Kleb. the causal agent of vascular wilt is an important pathogen of olive trees in growing areas of the world. Nine-month-old nursery olives including ‘Bladi’, ‘Conservalia’, ‘Kalamon’, ‘Koroneiki’, ‘Manzanilla’, ‘Mission’, ‘Marry’, ‘Picual’, ‘Rowghani’, ‘Sevillana’ and ‘Zard’ cultivars were root-dip inoculated with a defoliating (VCG1) isolate of V. dahliae obtained from diseased olives. Resistance was evaluated by assessing symptom severity using 0-4 rating scale and estimating the area under disease progress curves. The percentage of plants killed and final mean severity of symptoms were used as additional parameters for classifying the cultivars. Most of the tested cultivars were susceptible or highly susceptible to Verticillium wilt. However, two genotypes ‘Kalamon’ and ‘Koroneiki’ exhibited high resistance or resistance to this disease. Vegetative growth was reduced in inoculated plants due to infections caused by V. dahliae, although the reduction was remarkably higher in susceptible than in resistantcultivars. Correlation coefficient analyses revealed a negative relation between disease severity and vegetative growth. Dendrogram of olive cultivars based on all parameters represented two main clusters, major and minor. Minor cluster comprised only ‘Kalamon’ and ‘Koroneiki’ cultivars as resistant to V. dahliae. The major cluster could be divided into two groups, exhibiting extremely susceptible or susceptible reaction to V. dahliae.
https://ijhst.ut.ac.ir/article_66761_d0699b0cbc219ad692ef6726a8bf918f.pdf
Defoliating pathotype
olive
Resistance
vegetative growth
Verticillium dahliae
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
251
258
10.22059/ijhst.2017.234339.194
66762
Effect of Phenological Stages on Essential Oil Content, Composition and Rosmarinic Acid in Rosmarinus officinalis L.
Kianoush Hassanzadeh
kianoosh1982@gmail.com
1
Sasan Aliniaeifard
aliniaeifard@ut.ac.ir
2
Mohammad Mehdi Farzinia
3
Madeh Ahmadi
4
Kian Darou Zagros Co., Khorramabad, Iran.
Department of Horticulture, Aburaihan Campus, University of Tehran, PC. 3391653775, Pakdasht, Tehran, Iran
Department of Horticulture, Baharan Institute of Natural Sciences, Gorgan, Iran.
Department of Horticulture Science, Gorgan University of Agricultural Sciences and Natural Resources, Iran.
Rosemary (Rosmarinus officinalis L.) is an important medicinal plant that contained a wide range of secondary metabolites such as rosmarinic acid. In this study, essential oil content and composition and rosmarinc acid were determined at three phenological stages (before flowering, full flowering and fruit set stages). Hydro distillation method was used for essential oil extraction and GC and GC/MS was used for essential oil composition. On the basis of the obtained results rosemary plants in full flowering stage had higher amount of essential oil (1.99 ml/100 g dry weight) than in before flowering and fruit set stages (1.2 and 1.01 ml/100 per g dry weight, respectively). The extracted essential oil was contained 1,8-cineole, α-pinene, verbenone, camphor, geraniol, borneol acetae, camphene and linalool as major constituents. These constituents were affected by phenological stages. Before flowering, 1,8-cineole, α-pinene and verbenone (13.68%), in full flowering, 1,8-cineole (17.90%) and in fruit set α-pinene (21.77%) were the main constituents of the reosemary essential oil. Using HPLC analysis on leaf extract showed that the highest amount of rosmarinic acid (25.92mg/g DW) was observed in the fruit set stage. In conclusion, for essential oil content full flowering stage can be recommended for harvesting of Rosmarinus officinalis L. and for rosmarinic acid, fruit set stage can be the best time for harvesting of this medicinal plant.
https://ijhst.ut.ac.ir/article_66762_0761a85db10ed634ac8469e464ac3e4b.pdf
Essential oil constituents
growth stages
phonological stage
Rosemary
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
259
271
10.22059/ijhst.2018.260944.249
68068
Persian Walnut Phenology: Effect of Chilling and Heat Requirements on Budbreak and Flowering Date
Amin Hassankhah
hassankhah@ut.ac.ir
1
Kourosh Vahdati
ijhst@ut.ac.ir
2
Majid Rahemi
rahemi@shirazu.ac.ir
3
Darab Hassani
hassanida@gmail.com
4
Saadat Sarikhani Khorami
saadat.sarikhani@ut.ac.ir
5
Department of Horticulture, Aburaihan Campus, University of Tehran, Pakdasht, Iran
Department of Horticulture, Aburaihan Campus, University of Tehran, Pakdasht, Iran
Department of Horticultural Sciences, Faculty of Agriculture, Shiraz University, Shiraz, Iran
Temperate Fruits Research Center, Horticultural Science Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
Department of Horticulture, Aburaihan Campus, University of Tehran, Pakdasht, Iran
Walnut production is limited by late-spring frost in many countries. The current research was carried out to evaluate chilling and heat requirement of catkin and terminal buds break on six selected superior walnut genotypes and cultivars (‘C-25’, ‘88-1’, ‘88-2’, ‘Chandler’, ‘Jamal’ and ‘Damavand’). The Utah and accumulation growing degree hours (GDH) models were applied to determine the chilling and heat requirements under field and greenhouse conditions, respectively. ‘Damavand’ cultivar (650 CU) and ‘C-25’ genotype (650-800 CU) had the lowest chilling requirement for terminal bud break. ‘Jamal’ cultivar and ‘C-25’ genotypes had the lowest chilling requirement to break the dormancy of catkins (650–800 CU). ‘Chandler’ cultivar and ‘88-1’ and ‘88-2’ genotypes as late-leafing genotypes/cultivars had the highest chilling and heat requirements to break dormancy of terminal buds (800-1100 CU and 11832-12648 GDH) and catkin (800-950 CU and 11484-12180 GDH). In conclusion, late-leafing genotypes/cultivars had the higher heat requirement than early-leafing genotypes/cultivars. Based on the results, a linear and significant relation was observed between chilling requirement and heat accumulation. Therefore, heat accumulation of buds and catkins was reduced by increase in the amount of chilling requirement. Furthermore, the result revealed that heat accumulation is more important than chilling requirements to estimate walnut budbreak date. The GDH of catkins and terminal buds was decreased with increase in the average temperature during heat accumulation.
https://ijhst.ut.ac.ir/article_68068_d174613fa5056ac0391c410ec13fcd72.pdf
GDH model
Juglans regia
Late-leafing cultivars
linear regression
Utah model
eng
University of Tehran, College of Aburaihan
International Journal of Horticultural Science and Technology
2322-1461
2588-3143
2017-12-01
4
2
273
301
10.22059/ijhst.2018.242409.207
68067
Evaluation of the Modified VegSyst Model to Simulate Growth, Nitrogen Uptake and Evapotranspiration of Pumpkin (Cucurbita pepo L.) under Different Management Practices
Mohammad Reza Naderi
munajafabad@yahoo.com
1
Mohammad Bannayan
mobannayan@yahoo.com
2
Morteza Goldani
goldani@um.ac.ir
3
Amin Alizadeh
alizadeh@gmail.com
4
Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Simulation models can be used for predicting crop behavior under various environmental conditions and management practices. By prediction of crop behavior, it may be possible to adopt management practices which can maximize crop growth and yield. In this study, the VegSyst model which was introduced for simulation of daily crop dry weight (DW), fraction of intercepted PAR (fi-PAR), crop N uptake and crop evapotranspiration (ETc) of vegetables grown under intensively managed greenhouse conditions, was modified by attaching a component for simulation of the daily radiation use efficiency (RUE) and by introducing corrective factors for non-optimum growth conditions in order to apply it under field conditions and various management practices. The modified VegSyst model was calibrated and validated for pumpkin using growth data obtained from four years field experiments (2010, 2012, 2013 and 2014). This model very accurately simulated dry weight, fraction of intercepted PAR, radiation use efficiency, crop N uptake and crop evapotranspiration under optimum conditions for pumpkin growth (i.e. nitrogen rate of 250 kg ha-1, plant density of 2.5 plant m-2 and sowing date between 1-11 May). Under non-optimum growth conditions, model performance for simulating growth parameters of pumpkin was mostly very good or good. Suitable performance of the modified VegSyst model in simulation of DW, fi-PAR, RUE, N uptake and ETc of pumpkin under optimum and non-optimum growth conditions indicated that this model can be effectively used for studying growth of this important medicinal and forgotten crop under different management practices including nitrogen regimes, plant densities and sowing dates.
https://ijhst.ut.ac.ir/article_68067_7dd7f91caa35084a40e52a6159257521.pdf
Crop Modeling
Field conditions
Forgotten crops
Model performance
Radiation use efficiency