氮肥用量对中筋小麦扬麦11号产量和群体质量的影响

Effects of the Quantities of Nitrogenous Fertilizer on the Yield and Population Quality of the Mid-gluten Wheat Yangmai 11

为给中筋小麦优质高产氮肥的精量确定提供科学依据,以中筋小麦扬麦11号为材料,研究了氮肥用量对其产量和群体质量的影响。结果表明:在氮肥基追比为5:5、追肥在拔节期施用的条件下,产量与施氮量呈二次曲线关系,以施氮量225～281.25kg/hm2处理的产量、茎蘖成穗率、最大叶面积指数和成熟期干物质积累量较高。

The study is to provide scientific base for high production of mid-gluten wheat with certain applying amount of nitrogen fertilizer. Effects of the quantities of nitrogen fertilizer on the yield and population quality of mid-gluten Yangmai 11 are studied in the experiment. The results indicate that on the condition of the ratio of 5：5 between basal N and top dressing N, the nitrogen applying on the shooting stage and the suitable applying amount of nitrogen fertilizer of 225-281.25kg/hm^2, the yield and the overall applying quantities of nitrogen fertilizer show conic relation and it can get higher grain yield, ratio of fertile tillers, the max LAI and biomass of ripping period.