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以湘杂油7号为材料,研究了稻田免耕直播不同密度及不同施氮量对油菜的生长发育、植株生物学特性、产量构成因素和产量的影响。结果表明:在种植密度相同的情况下,施用氮肥180.0 kg/hm2处理的油菜植株长势优于施氮肥120.0 kg/hm2处理;在相同施氮水平下,产量随密度增加先增加后降低,种植密度为45万株/hm2产量最高。各处理油菜的产量均显著高于对照,其产量大小顺序为T5>T4>T2>T1>T6>T3,处理1至6产量分别比对照增加82.33%、92.02%、35.51%、94.93%、117.93%、53.16%。结果显示,稻田免耕直播油菜获得高产的适宜施氮量为180.0 kg/hm2,适宜种植密度为45万株/hm2。
The effects of no-tillage and sowing direct-seeded rice in paddy field on the growth and development, plant biological characteristics, yield components and yield of rapeseed were studied using Xiangzayou 7 as material. The results showed that under the same planting density, the growth of rapeseed treated with nitrogen 180.0 kg / hm2 was better than that of 120.0 kg / hm2 N application. Under the same nitrogen application, the yield increased at first and then decreased with the increase of planting density, For 450,000 / hm2 highest yield. The yield of each treatment rape was significantly higher than that of the control, and the order of yield was T5> T4> T2> T1> T6> T3. The yield of treatments 1-6 increased by 82.33%, 92.02%, 35.51%, 94.93%, 117.93 %, 53.16%. The results showed that the optimal nitrogen application rate for no-tillage rapeseed was 180.0 kg / hm2 and the suitable planting density was 450,000 plants / hm2.