棉 花 学 报 Cotton Science 2006，18(2)：89-93

Study on the Characteristics of N P K Absorption and Distibution of Hybrid Cottons
SONG Zhi-wei¹，LIU Song-tao^1，2，CAO Wen-mei¹，WANG Han-min¹，FANG Wei-ping³，LI Chao-hai²
(1.Henan Vocational College of Agriculture，Zhongmou 451450，China，2. Agomomy College Henan Agricultural University，Zhengzhou 450002，China；3.Cotton and Oli Crop Research Institute Henan province Academy of Agricultural sciences，Zhengzhou 450002，China)

Abstract：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).
Key words：hybrid cotton；yield；nourishment；metabolism     [Full Text, 2048KB]