摘要
以姜堰地区大面积种植的南梗9108为供试材料,研究栽插方式对水稻产量和构成因素的影响。结果表明:水稻产量以人工栽插最高,机插次之,直播最低。在产量构成因素上,穗粒数、结实率和千粒重均表现为人工栽插>机插>直播,穗数则相反。同时,人工栽插稻生育前期干物质积累多,单茎干重大,籽粒灌浆前中期有较多的光合物质,满足籽粒充实,后期茎鞘再度充实,保持茎秆支撑强度;籽粒灌浆后期有较高茎鞘贮藏物质的输出与转运,满足籽粒库容的有效充实。直播稻和机插稻在前中期茎鞘贮藏物质少,灌浆后期光合物质生产主要提供籽粒灌浆,茎鞘再充实强度小,影响后期抗倒能力。
Nangeng 9108 which is widely cultivated in Jiangyan region wass taken as the test materials to study the influence of planting method on rice yields and component factors. The results show that, artificial planting gains the highest yields, ma- chine planting takes the second place and direct seeding has the lowest yields. For yield components, kernels per spike, setting rate and thousand kernel weight all follow this result： artificial planting〉 machine planting〉 direct seeding, but spike number has opposite result. Meanwhile, during early growth stage, the artificial planting rice accumulates more dry matter and the dry weight of its single stem is heavier; in the early and middle stages of grain filling, it has more photosynthetic matters and high- er grain filling degree; in later stage, stem--sheath is filled again to maintain the supporting strength of stalks. In the late stage of grain filling, the output and transport of stem sheath reserves are relatively high, which satisfy the effective filling of kernel sink. Stem sheath reserves of direct seeding rice and machine planting rice are few in the early and middle stages; in the late stage, the production of photosynthetic matter is mainly for grain filling and the refilling strength of stem sheath is small, which influence the ability of lodging resistance in the later growth stages.
出处
《耕作与栽培》
2015年第6期22-23,43,共3页
Tillage and Cultivation
关键词
南梗9108
人工栽插
直播
机插
Nangeng 9108
artificial planting
direct seeding
machine planting
