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本文研究了灌溉、施肥量与播种期对露地棉与地膜棉根系的生长特性及其与地上部的相互作用和产量形成的影响。结果表明,生长期灌水处理棉株根系入土浅,总长度减少,未灌水处理根量在深土层明显增加;重肥处理根系入土深,深土层根量增加。灌水及重肥处理根系新根量均增加,根系伤流量增大,生理活力增强。早播棉株主根深度增加,根重增大,尤在生育前期增长明显,同时.根系建成提前,根系分布范围广。灌水、重肥与早播处理棉株根重、地上部重及籽棉产量等均增加。棉株根量与产量间存在显著相关关系,蕾期根量对产量的效应最大。
In this paper, the effects of irrigation, fertilizer amount and sowing date on the growth characteristics of root system and the interactions and yield formation of cotton with plastic film mulching cotton were studied. The results showed that the roots of cotton plant grew shallowly and the total length decreased, while the root volume of non-irrigation treatment increased obviously in deep soil layer. The root volume of heavy fertilizer treatment was deeper and deeper soil layer increased. Roots of irrigation and heavy fertilizer treatment increased the amount of new roots, increased root trauma and increased physiological activity. The root depth of early-sowing cotton plants increased, root weight increased, especially in pre-growth significantly increased. At the same time, the root system completed in advance, the root distribution of a wide range. Irrigation, heavy and early seeding cotton root weight, shoot weight and seed cotton yield increased. There was a significant correlation between cotton root yield and yield, and the effect of bud weight on yield was greatest.