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以江苏大丰和山东惠民为试点,研究了不同生态条件下抗虫杂交棉去、留叶枝处理及其与密度的互作效应。结果表明:在一定密度范围内,留叶枝处理对株高有一定的抑制作用,而对果枝数没有明显影响,不同密度处理对单株叶枝数影响不大,但随着密度的增加,有效叶枝数减少;除大丰试点最高密度处理外,不同密度下留叶枝处理的皮棉产量均高于去叶枝处理,大丰和惠民两试点分别平均增产5.41%和12.90%;大丰试点以1.8万株/hm2留叶枝处理组合最优,其次为2.4万株/hm2留叶枝处理组合,惠民试点则以3.75万株/hm2留叶枝处理组合产量最高,其次为4.2万株/hm2留叶枝处理组合。研究结果进一步表明,结合稀植简化整枝栽培技术推广杂交棉,是实现杂交棉高产高效的重要手段。
Taking Dafeng in Jiangsu and Huimin in Shandong as experimental sites, the effects of removing and retaining branches and their interaction with density on insect-resistant hybrid cotton under different ecological conditions were studied. The results showed that in a certain range of density, leaf retention had some effect on plant height, but had no obvious effect on the number of fruit branches. Different density treatments had little effect on leaf number per plant but with the increase of density, Dafeng and Huimin pilots increased by 5.41% and 12.90% respectively on average; the Dafeng experimental sites were treated with 18,000 Hm2 leaves retained the best combination, the next was 24000 plants / hm2 retained leaf branch combination, while Huimin pilot had the highest yield of 37500 plants / hm2 remaining leaf branch, the next was 42000 plants / hm2 left leaf branch combination . The results further show that the combination of thinning simplified pruning cultivation technology to promote hybrid cotton, hybrid cotton yield and efficiency is an important means to achieve high yield.