TY - JOUR ID - 69074 TI - Determine a Regression Model between Phosphorus of Soil Saturation Extract and Various Organs of Washington Navel Orange for Recommendation of Phosphorus Fertilizer JO - International Journal of Horticultural Science and Technology JA - IJHST LA - en SN - 2322-1461 AU - Ejraei, Abdolkarim AU - Mohammadi Ghehsareh, Ahmad AU - Hodaji, Mehran AU - Besalatpor, Ali Asghar AD - Department of Soil Science, College of Agriculture, Khorasgan (Isfahan) Branch, Islamic Azad University, Isfahan, Iran AD - Department of Soil Science, College of Agriculture, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran Y1 - 2018 PY - 2018 VL - 5 IS - 2 SP - 175 EP - 184 KW - Fertilizer recommendation KW - Phosphorous KW - Regression model KW - Washington Navel orange DO - 10.22059/ijhst.2018.254225.227 N2 - Several methods have been proposed for recommendation of phosphorus fertilizers. Each of them only examines the concentration of phosphorus in the soil or plant, while none of them investigates the correlation between phosphorus concentrations in the soil and plant. In this study, a method called "integrated plant and soil system" (IPSS) is proposed to describe phosphorus fertilizer. In this system, for recommendation of phosphorus, the correlation between this element in soil and plant was used. For this purpose, 39 Washington Navel Orange orchards were selected in Jahrom region and from each orchard three trees were chosen. Samples were taken from soil and plants during two consecutive years and their phosphorus was measured. Orchards were divided into two categories, first group high-yield orchards and another includes all orchards. The correlation was run between soil properties and phosphorus of plant organs with the phosphorus of soil saturation extract samples. Factors were selected that shown significant correlation with the phosphorus of soil saturated extract, and multivariate regression was established between them. The results showed a significant correlation between phosphorus of plant organs and soil samples, and the highest correlation was observed between fruit phosphorus and phosphorus of soil saturation extract. Moreover, there was a significant correlation between phosphorus of plant organs, and the highest correlation was observed between fruit phosphorus with other plant organs. A equation was also obtained for each of the two orchard groups, these two equations can calculate the amount of phosphorus required for orange orchards. UR - https://ijhst.ut.ac.ir/article_69074.html L1 - https://ijhst.ut.ac.ir/article_69074_60c8a1c232b51a2ec831c4671bc6b823.pdf ER -