不同施氮模式对水稻产量的影响

水稻的不同生长发育时期对肥料的需求量不同,并且肥料在土壤中会逐渐降解,肥料在土壤中存在的时间越长降解越多。所以合理搭配肥料用量和安排施用时间是水稻施肥的重点,以最小的肥料投入获得最高产量,提高经济效益。本试验在同等纯氮施用量的处理中以处理3的施肥方式为最佳:基肥尿素3 kg/667 m2,一次蘖肥施用硫酸铵4 kg/667 m2、尿素2 kg/667 m2,二次蘖肥2 kg/667 m2,穗肥3 kg/667 m2。此种施肥方式水稻长势情况、各项产量构成因素表现非常均衡,所取得的产量也最高。

Effect of Nitrogen Application Model on Yield of Rice

Proper fertilizer amount and application time are the emphases on rice fertilization.In this experiment,when the fertilizer amounts were same,treatment 3 obtained the best yield,that is,3 kg/667 m2 urea as basal fertilizer,4 kg/ 667 m2(NH4)2SO4 + 2 kg/667 m2 urea as primary tillering fertilizer,2 kg/667 m2 urea as secondary tillering fertilizer,and 3 kg/667 m2 urea as panicle fertilizer.Under this condition,the growth situation and yield components were balanced and the yield was higher than other treatments.