基于减肥条件下水稻侧深施肥的高产增效增收效应分析

Effect Analysis of Improving Yield,Nitrogen Utilization Efficiency and Economic Benefits by Side-deep Fertilization in Paddy Field Based on Reducing Chemical Fertilizers Input

通过对2020年江苏省8个县(市、区)开展的水稻侧深施肥试验结果分析发现:水稻侧深施肥技术配合缓控释肥应用在减肥增效、提高水稻产量和经济效益方面效果显著。与常规施肥处理相比,水稻侧深施肥处理在减施氮肥14.63%~30.23%的条件下,产量平均增加599.00 kg/hm^(2),平均增产幅度为6.21%。侧深施肥技术的水稻氮素利用率、氮素偏生产力的平均值分别由常规施肥处理的33.64%和31.30 kg/kg提高至43.46%和41.29 kg/kg。侧深施肥技术的平均净增效益为1486.53元/hm^(2),全生育期能减少用工1~4次。

Eight experiments of rice side-deep fertilization were conducted in Jiangsu Province in 2020.The results showed that rice side-deep fertilization combined with slow-release fertilizer had significant effects on nitrogen fertilizer reduction and efficiency increase,yield and economic benefits.Compared with conventional fertilization,under the condition of 14.63%~30.23%reduction of nitrogen fertilizer,the side-deep fertilization increased the rice grain yields by 599.00 kg/hm^(2)with an increase of 6.21%,increased the nitrogen utilization efficiency and partial factor productivity from 33.64%and 31.30 kg/kg to 43.46%and 41.29 kg/kg,respectively,and reduced the labor input by 1~4 times,and increased the average economic benefits by 1486.53 Yuan/hm^(2).