论文部分内容阅读
以夏玉米唐抗 5号为材料 ,研究了移栽、直播和耕后播种夏玉米的子粒灌浆特性。结果表明 ,灌浆前期 (授粉后 16d以前 ) ,移栽玉米的子粒灌浆速率略低于直播和耕后播种处理 ;但灌浆中后期的灌浆速率显著高于直播 ,耕后播种处理的灌浆速率最低。移栽处理各发育时期提前 10～ 15d ,从而延长了子粒有效灌浆期的长度。移栽降低株高和穗位高 ,单位面积的穗数、穗粒数和千粒重均不同程度地提高 ,从而提高了经济产量
Taking summer corn Tangkang 5 as material, the grain filling characteristics of transplanting, direct seeding and sowing summer maize were studied. The results showed that the grain filling rate of transplanting corn was slightly lower than that of direct seeding and plowed seeding treatments at the early grain filling stage (before 16d after pollination). However, the grain filling rate at late grain filling stage was significantly higher than that of direct seeding. The grain filling rate after sowing was the lowest. The developmental stages of transplanting treatments were advanced by 10-15 days, thus prolonging the grain filling period. Transplanting reduced plant height and ear height, spike number per unit area, grains per spike and 1000-grain weight increased to varying degrees, thus increasing economic yield