【摘要】 针对北方稻区机械穴直播水稻群体穗位不整齐、丰产性差等问题,于2018年～2019年在沈阳市博科种业试验基地,以辽粳436为试材进行了密度试验,研究了穗苗比对籽粒产量形成的影响。结果表明,穗苗比与基本苗和籽粒产量呈显著的线性回归关系,当穗苗比等于1时,籽粒产量达到最高。不同品种和不同栽培条件下,可通过调整播种量控制基本苗,使穗苗比达到或接近于1,从而实现高产。更多还原

【Abstract】 In view of the problem of irregular ear height and poor yield ability of dry direct-seeding rice in north China,the plant space experiment was performed in Shenyang Boke seed industry test site from 2018 to 2019 to study the effect of panicle-to-seedling ratio on the yield formation of Japonica rice. The results indicated that panicle-to-seedling ratio was in significant nonlinear regression relationship with the grain yield and the basic seedling number. When the ratio of panicle to seedling was 1, the yield would be the highest. The basic seedling number could be controlled by adjusting the sowing amount to make the panicle-to-seedling ratio reach or be close to 1 for specific varieties under different cultivation conditions to attain the high yield.更多还原