Vahideh Narjesi; Javad Fatahi Moghadam; Ali Akbar Ghasemi-Soloklui
Abstract
A prevalent problem in pomegranate fruit (Punica granatum L.) is sun damage that decreases the quantity and quality of fruit. The objective of the current research was to evaluate the effects of different photoselective shade net colors and shading percentages on growth traits and pomegranate fruit quality ...
Read More
A prevalent problem in pomegranate fruit (Punica granatum L.) is sun damage that decreases the quantity and quality of fruit. The objective of the current research was to evaluate the effects of different photoselective shade net colors and shading percentages on growth traits and pomegranate fruit quality for two years (2019 and 2020). Plots of pomegranate trees (cv. Malase Saveh) were covered to full canopy with two colors of photo-selective shade nets (white and green) and with two shading percentages (30 and 50%), compared to uncovered plots (control). The experiment was carried out in the Saveh region in the same orchard at the time of fruit set (10 June) and the shading treatments were maintained on the trees for four months. The findings showed that shade nets increased relative leaf water content while decreasing temperature and light intensity in the canopy, compared to the control. Pomegranates under nets had a much higher fruit weight and yield than those on uncovered trees. The percentage of sunburn on fruits was dramatically reduced when a shade net was used. In uncovered trees, the percentage of sunburn was 27.85%, whereas in shade treatments, the percentage of sunburn was 0 - 4.5%. The white shade net allowed 50% PAR (Photosynthetically Active Radiation) and caused the highest fruit weight, juice percentage, aril weight and yield, maximum color of fruits and arils, as well as the lowest level of proline content among the shading treatments. The highest values of total anthocyanin (55.13 mg/100 mL), total phenolics (34 mg GAE/100 mL) and vitamin C (21.32 mg/100 mL) were observed after using the white shade net of 50% PAR. As a result, this type of net is recommended for pomegranate orchards because of its efficiency in improving yield and marketable fruits.
Namrata Ghimire; Arvind Srivastava; Deepak Poudel; Kamal Raj Gaire
Abstract
To determine the suitability of different mulching materials for improving the yield of potato,a field experiment was conducted from January 2020 to May 2020 at Kavrepalanchowk, Nepal. The experiment was carried out in Randomized Complete Block Design (RCBD) with five treatments including: T1: silver ...
Read More
To determine the suitability of different mulching materials for improving the yield of potato,a field experiment was conducted from January 2020 to May 2020 at Kavrepalanchowk, Nepal. The experiment was carried out in Randomized Complete Block Design (RCBD) with five treatments including: T1: silver plastic mulch, T2: black plastic mulch, T3: perforated black plastic mulch, T4: straw mulch, and T5: Control, with four replications. The experiment revealed that the highest tuber yield was obtained in silver plastic mulch (42.29tonne/ha) followed by perforated black plastic (41.04tonne/ha), black plastic (39.17tonne/ha), and straw (28.54tonne/ha) mulches, and the lowest yield was obtained in the Control treatment (21.46tonne/ha). Soil temperature was found to be influenced by the use of mulching materials with the highest soil temperature recorded under black plastic mulch, whereas the lowest soil temperature was detected under the Control treatment. The economic analysis of using different mulching materials showed the highest benefit/cost ratio by silver plastic mulch (3.63); followed by perforated black plastic mulch (3.53) and the lowest benefit/cost ratio was calculated for the Control (2.60). The present study, therefore, depicted silver plastic mulch followed by perforated black plastic mulch as the most effective mulching material for improving production of potato.
