1　抓腾茬早播,为高产稳产争主动。直播稻播期受小麦腾茬早晚的限制,分别要比手插稻和抛秧稻推迟近25天和15天播种。由于迟播,生育期缩短,主茎总叶片数减少,加之群体密度大,穗型略小,如推迟到6月20日后播种,即使增加播种量也不能弥补因迟播而造成的损失。如遇冷空气早来年... 1 Teng Teng early crop, stable and active for high yield. Direct sowing date by the wheat stubble morning and evening restrictions, respectively, than hand-inserted rice and throwing rice seedlings delayed 25 days and 15 days sowing. Due to late sowing, shortened growth period, reduced number of main stem leaves, combined with large population density and slightly smaller panicle size, such as postponing to sowing after June 20, even if increasing seeding rate can not make up for losses due to late sowing. In case of cold air in the early years ...