水稻生产氮肥运筹对产量及其构成因素的影响

Effects of Different Nitrogen Application on Yield and Its Component Factors of Rice

以北方超级稻铁粳7号为试材,重点分析了水稻生产氮肥运筹对产量及其构成因素的影响。结果表明,铁粳7号的实际产量以施纯氮255 kg/hm2、基蘖肥与穗粒肥比为8:2处理下达到最高为9 270.1 kg/hm2,以较高的有效穗数和每穗实粒数获得高产;施纯氮210 kg/hm2、基蘖肥与穗粒肥比为6:4处理下次之为9 131.5 kg/hm2,以较高的每穗实粒数和千粒重来获得高产,二者产量差异不大。

Tiejing7 was used to research the effects of different nitrogen application on yield and its component factors of rice, with three treatments of nitrogen application which was based on the different proportion of basal, tillering, panicle and granular fertilizer at the different nitrogen level. The results showed that actual yields of the variety Tiejing7 were highest, reaching 9 270.1 kg/hm2, on the condition that application amount of Nitrogen fertilizer is 255 kg/hm2 and the ratio of basal fertilizer and tillering fertilizer is 8：2. The higher number of productive ears and number of grains per ear lead to the high yield. However, actual yields of the variety Tiejing7 were higher, reaching 9 131.5 kg/hm2, on the condition that application amount of Nitrogen fertilizer is 210 kg/hm2 and the ratio of basal fertilizer and tillering fertilizer is 6：4. The higher number of grains per ear and thousand-grain weight contribute to the high yield. The yield variance of both treatments is almost indiscriminate.