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本文研究了早晚稻混栽中不同密度和插植规格及早稻的收获高度、晚稻的施肥时期对早晚稻生长和产量的影响。结果如下:(1)早稻群体的分蘖发生速度以宽行密植的较快,有效穗数多。密度相同时,采用宽行窄株插植的地上部干物质生产量和产量较高:(2)早稻收获前7d追施氮肥,可促进晚稻分蘖的发生。早稻收获时留桩20cm,混栽晚稻的分蘖发生速度快于撩穗收获的,且有效穗数多,但每穗的结实粒数少,穗型小;(3)从产量水平来看,以早稻收获前7d追肥、留柱高20cm收获的晚稻产量最高。
In this paper, the effects of different planting densities and planting specifications on early and late rice planting, the harvesting height of early rice, and the fertilization period of late rice on the growth and yield of early and late rice were studied. The results are as follows: (1) The tillering rate of early rice population was faster and more effective panicles were planted in wide rows. At the same density, the production and yield of above-ground dry matter with wide-row narrow plants were higher: (2) Top-dressing nitrogen fertilizer 7 days before harvest could promote the tillering of late rice. Early rice harvesting pile 20cm, late hybrid rice tiller tillering faster than Qili sclerosis, and the effective spike number, but the number of grains per spike less, panicle type small; (3) from the output level, the Early rice 7d before harvest top dressing, leaving the column height 20cm harvested late rice yield the highest.