杂交棉氮磷钾吸收分配特点的研究

Study on the Characteristics of N P K Absorption and Distibution of Hybrid Cottons

以杂交棉标杂A1、豫杂35和常规棉中棉所41为材料进行试验,结果表明杂交棉单铃重和皮棉产量均高于常规棉,且达极显著水平。对纤维品质检测的结果表明杂交棉的纤维长度、强度、细度等比较协调,优于常规棉。三个品种对N、P、K的吸收均呈Logistic曲线,但三者吸收速度并不同步,杂交棉养分净积累量和吸收速率在盛铃前高于常规棉,最大吸收强度出现在初花期至盛铃期(7月5日-8月4日);杂交棉棉株N、P、K向茎枝的分配率在盛花期(7月20日)最高,向叶片的分配率一直低于或接近于常规棉;而向花蕾的分配率在盛花期达最大值;向子棉的分配率在吐絮期(8月25日)高于常规棉。

The experiment was conducted on hybrid cotton cultivars. Biaoza A1 .Yuza 35 and conventional cultivar CCRI 41. The result showed that the weights of single boll and lint yield of hybrid cotton were significantly higher than those of the conventional cotton variety. And the test of fiber quality showed the fiber strength, and fineness of hybrid cotton were better and more harmonious. The absorbing speeds were different, and the net accumulation of nourishment and absorbing speeds of hybrid cotton were higher before the peak boll period, though the three cultivars showed the similar Logistic curve in N,P, K absorption the greatest absorbing speeds appeared from early blossom period to the peak boll period （July 5-August 4）. The results also showed the rates of carrying N,P,K to the branches on the hybrid cotton were the highest in peek flowering （July 20） ,that the rates of carrying N,P, K to the leaves were lower or close to those of the conventional cultivar ; higher before peak flowering,the rates of carrying to the seed cotton were also higher during the period of boll opening （August 25）.