依叶龄运筹氮肥对优质水稻产量与品质的影响

Effects of Nitrogen Operations According to Leaf-Age on Yield and Quality in Good-Quality Rice

为研究依叶龄运筹氮肥对圣稻 30 1产量与品质的影响及施用氮肥效果 ,以优质中粳稻圣稻 30 1为材料 ,按照基蘖肥与秆穗肥施氮比例和秆穗肥施氮叶龄期 ,设计了 1 5种施氮运筹模式。结果表明 :在大苗栽培体制和 2 2 5 kg.hm-2施氮水平下 ,适当减少基蘖肥施氮比例与相应增加秆穗肥施氮量 (即穗重法 ) ,并在倒 4和倒 1叶期 2次追施秆穗肥 ,比常规施氮模式更有利于强化圣稻 30 1高产群体的产量形成 ,且较好地保持了该品种的 1级优质米的品质性状 。

In accordance with N applying proportion between basic tillering and stem panicle fertilizers and N applying leaf age of stem panicle N fertilizers, the effects of 15 patterns of nitrogen operation on yield and quality of good quality rice were studied in Shengdao 301 as materials, also the efficiencies of different N applying patterns were evaluated. Under big seedling transplanting and N applying amount of 225kg·hm -2 , reducing properly basictillering N applying proportion, at the same time applying stem panicle N fertilizer of equal amount in 4th and 1st leaf age from top at 2 times, was more propitious to put up the high yield population of Shengdao 301 than routine N applying patterns, and maintained, all the same, good grain qualities of grain. Besides, the increase productivity of N applying in dry matter accumulation after heading and yield also was improved remarkably.