水稻不同氮肥运筹与抛栽密度对群体质量的影响

Influence of Different Applied Nitrogen and Throw planting Density on Mass Quality of Rice

水稻旱秧抛栽在低氮和高氮施肥条件下 ,抛栽不同的基本苗 ,对群体质量的影响较大 ,抛栽适宜的基本苗有利于优化群体 ,提高成穗率、粒叶比 ,增加抽穗至成熟期的干物质积累量 ,从而提高产量。生产上应根据不同的肥水条件 ,确定合理的群体起点。在低肥情况下 ,可适当增加基本苗 ;在高产栽培下 ,应严格按照抛栽基本苗公式进行确定 ,并适当增加肥料投入 ,以获得高产。

Different amount of basic seedlings of throw planted rice have significantly different mass quality under low nitrogen and high nitrogen.The optimum basic seedilings help optimize the mass, increase the percentage of tillering and the proportion of grains to leaves, add accumulation amount of dry matter during heading period to mature period, so the yield is improved. Rational mass quantity should be determined according to different fertilizer conditions in production. Basic seedlings can be increased appropriately under low fertilizer. While under the condition of high yield culture, basic seedlings should be calculated by the basic seedling formula of throw planting rice, and the fertilizer also should be increased properly in order to get high yield.