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运用 14 C示踪技术 ,研究了简化整枝与早打主茎顶心、少留果枝改变株型对 14 C同化物生产分配的影响。结果表明 ,简化整枝蕾期、花铃期果枝叶的光合作用强度和14 C同化量均低于对照 ,且 14 C同化物向主茎和果枝的分配比例也较对照降低。简化整枝早打主茎顶心 ,可提高花铃期果枝叶、叶枝叶的光合作用强度和 14 C同化物向叶枝的分配比例。反映到产量和产量构成因素上 ,表现为简化整枝主茎结铃减少 ,叶枝结铃可弥补其损失 ,单铃重和衣分略有降低 ;简化整枝早打主茎顶心增加了叶枝结铃数 ,且单铃重和衣分略有提高。但处理间的皮棉产量均无显著差异
Using 14 C tracer technique, the effects of simplifying pruning and early planting on the top center of stem stem and decreasing the number of fruiting branches to change the production and distribution of 14 C assimilates were studied. The results showed that the intensity of photosynthesis and the 14 C assimilation of the branches and leaves of flower buds were lower than those of the control during the simplified budding stage and the proportion of 14 C assimilates to the main stems and fruit branches also decreased. Simplify the pruning earlier hit the top of the main stem of the stem, can improve the flower and fruit foliage, leaf photosynthesis intensity and 14 C assimilate to the leaf distribution ratio. Reflected in the yield and yield components, the performance of the pruning branch to simplify the reduction of bolls, leaf knot can make up for its loss, a single boll weight and slightly reduced; Number, and a single boll weight and clothing slightly improved. However, there was no significant difference in lint yield between treatments