Modeling the Effect of Planting Dates and Nitrogen Application Rates on Potatoes Water Productivity in Jordan Valley  

作　　者：Ayman Suleiman Ayman Suleiman(Department of Land, Water and Environment, Faculty of Agriculture, The University of Jordan, Amman, Jordan)

机构地区：[1]Department of Land, Water and Environment, Faculty of Agriculture, The University of Jordan, Amman, Jordan

出　　处：《American Journal of Plant Sciences》2022年第1期137-146,共10页美国植物学期刊（英文）

摘　　要：Agricultural sector in Jordan is facing serious challenges in meeting the<span style="font-family:;" "=""> growing needs of food security because of its low water availability. Maintaining <span>and enhancing agricultural water productivity under such prevailing</span> environmental constraints are hard to achieve. Potatoes water productively in Jordan Valley was modeled using Decision Support System for Agrotechnology Transfer (DSSAT) under six nitrogen applications (0, 60, 80, 100, 120 and 140 kg/ha) and twelve planting dates every two weeks from October 1 to March 15 scenarios. The potatoes yield increased from 0% to 100% nitrogen treatment and then no considerable increase occurred. The potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> crop yield increased from October 1^st to January 15 and then decreased after which until the last day of planting date. The seasonal cumulative crop evapotranspiration for potatoes about doubled from 0% to 60% nitrogen treatment and then kept increasing gradually until the last treatment. The growing season cumulative crop evapotranspiration for potatoes increased gradually from October 1 to March 1. The water productivity increased from 0% nitrogen treatment to 100% and then decreased. The potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> water productivity increased from October 1 until November 15 and then decreased to the end. From these results, we recommend that 100% of nitrogen requirements should be applied. The best window for potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> planting date is the last two weeks in November.</span>Agricultural sector in Jordan is facing serious challenges in meeting the<span style="font-family:;" "=""> growing needs of food security because of its low water availability. Maintaining <span>and enhancing agricultural water productivity under such prevailing</span> environmental constraints are hard to achieve. Potatoes water productively in Jordan Valley was modeled using Decision Support System for Agrotechnology Transfer (DSSAT) under six nitrogen applications (0, 60, 80, 100, 120 and 140 kg/ha) and twelve planting dates every two weeks from October 1 to March 15 scenarios. The potatoes yield increased from 0% to 100% nitrogen treatment and then no considerable increase occurred. The potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> crop yield increased from October 1^st to January 15 and then decreased after which until the last day of planting date. The seasonal cumulative crop evapotranspiration for potatoes about doubled from 0% to 60% nitrogen treatment and then kept increasing gradually until the last treatment. The growing season cumulative crop evapotranspiration for potatoes increased gradually from October 1 to March 1. The water productivity increased from 0% nitrogen treatment to 100% and then decreased. The potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> water productivity increased from October 1 until November 15 and then decreased to the end. From these results, we recommend that 100% of nitrogen requirements should be applied. The best window for potatoes</span><span style="font-family:;" "="">’</span><span style="font-family:;" "=""> planting date is the last two weeks in November.</span>

关 键 词：Deficit Irrigation POTATOES DSSAT Nitrogen Application Planting Dates Water Productivity 

分 类 号：F42[经济管理—产业经济]