水稻“肥旱稀”栽培基蘖肥与穗肥配比对产量的影响

The Effects of the Proportions of Basal Fertilizer to Spike Fertilizer on Rice Yield in Rich-dry-thin Planting

在水稻“肥床旱育稀植”栽培条件下 ,通过不同的肥水运筹 ,降低基蘖肥施用比例 ,增加穗肥施用量 ,有利协调穗数与粒数的矛盾 ,促进稻谷产量的提高 ,本试验以 5∶5的施用比例产量最高 ,为 9 885t·hm- 2 ,达到了稳定穗数 ,促进枝粳、颖花发育 ,争取大穗多粒的目的 ,有效地提高了后期群体光能利用率 ,使产量结构因素在高水平下达到协调统一。

Through the application of rational fertilizer and water, lowing the amount of basal fertilizer while enhancing the amount of spike fertilizer, the problems between spike number and seed number can be solved and the rice yield can also be promoted in rich dry thin rice planting. The rice yield which is about 659kg per mu is the highest in the ratio of 5 to 5 between basal fertilizer and spike fertilizer. The experiment shows that in this ratio spike number can be steadied, the stems can be strengthened and head flowering can also be enhanced. As a result, big spikes and more grains can be realized. About all, in this way solar energy in the mass of late preiod can be effectively utilized and all factors can be scientifically used and coordinated in achieving high rice field.