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在麦棉套作模式下,设置了187.5、225.0、262.5、300.0、337.5、375.0 kg/hm~26个小麦播量处理,研究了不同播量对小麦边行优势与产量的影响。结果表明,播量对内行小麦的影响大于边行,随着播种量的增加,穗数的边行优势总体降低,边行与内行差值由90万穗/hm~2(播量187.5 kg/hm~2)降至78.0万穗/hm~2(播量375.0 kg/hm~2);穗粒数边行优势总体先增后减,播量300.0 kg/hm~2处理边行与内行穗粒数差值最高(4.6粒);千粒质量与产量边行优势总体逐渐增加,播量337.5 kg/hm~2处理边行与内行千粒质量差异最高(3.9 g),产量边行与内行差值以播量375.0 kg/hm~2处理最高,为3 136.5 kg/hm~2;播量对套作小麦产量三因素影响的大小依次为穗数、穗粒数、千粒质量,麦棉套作小麦适宜播种量在225.0~262.0 kg/hm~2。
Under wheat-cotton intercropping system, the seeding volume of 187.5,225.0,262.5,300.0,337.5,375.0 kg / hm ~ 26 was set and the effects of different sowing rates on the sideline yield and yield of wheat were studied. The results showed that the sowing effect on the intertilled wheat was greater than that on the marginal line. With the increase of the sowing rate, the fringe benefits of the panicle number decreased overall. The difference between the fringes and the internals was increased from 900 000 spikes / hm 2 (sowing 187.5 kg / hm ~ 2) decreased to 780,000 spikes / hm ~ 2 (sowing rate 375.0 kg / hm ~ 2) The grain number difference was the highest (4.6 grains). The quality of the grain yield and yield increased along the line, and the highest difference was found between the yield of 337000 kg / hm ~ 2 and that of the line The difference was the highest with the sowing rate of 375.0 kg / hm ~ 2, which was 3 136.5 kg / hm ~ 2. The sowing effect on the three factors of intercropping wheat was in the order of spikes, grains per spike, The suitable sowing amount of wheat was 225.0 ~ 262.0 kg / hm ~ 2.