Effects of Different Nitrogen Application Models on Nitrogen Loss and Yield in Paddy Field under the Condition of Side-deep Fertilization
In order to investigate the effects of different nitrogen application patterns on nitrogen loss and yield in paddy fields under the condition of side-deep fertilization,eight treatments were set up:conventional fertilization,quick-acting nitrogen fertilizer,slow-release nitrogen fertilizer with low dose,slow-release nitrogen fertilizer with high dose,special fertilizer for rice lateral deep fertilization,no fertilizer treatment,low-dose fertilizer with seedling tray and high-dose fertilizer with seedling tray.The results showed that the leakage loss of rice in growing season was mainly affected by nitrogen application rate,and the concentrations of nitrate nitrogen,ammonium nitrogen and total nitrogen in leakage solution basically decreased with the increase of soil depth;Compared with conventional fertilization treatments,the yield increased by 6.2％,18.3％,12.2％,0.6％and 9.1％in the treatments of quick-available nitrogen fertilizer,slow-release nitrogen fertilizer with low dosage,slow-release nitrogen fertilizer with high dosage and seedling tray with high dosage,while the effect of side-deep special fertilizer treatment and no fertilizer treatment on effective panicle,grain number and seed setting rate of rice was little.Considering comprehensively,under the premise of saving cost and increasing efficiency in agricultural production and environmental benefits,the application of slow-release nitrogen fertilizer reduction treatment and seedling tray fertilizer low-dose treatment are the optional environment-friendly fertilization modes.
万方数据
维普
