系5超高产下的群体发育及养分吸收动态研究

Study on Community Development and Mineral Nutrition Asorption for VarietyC5 High Yield Plot

对系５高产田（皮棉２．５８ｔ·ｈｍ－２）的群体发育及矿质养分吸收动态进行了研究，结果表明：叶面系数最大约为２，叶层透光率１２：００～１４：００最高，盛花期中上层透光率约４０％，盛铃期中部５８．２３％，上部７５．２６％，全期吸收Ｎ，Ｐ２Ｏ５，Ｋ２Ｏ分别为４６９．５，１５０．４５，８７４．５ｋｇ·ｈｍ－２，Ｎ∶Ｐ２Ｏ５∶Ｋ２Ｏ为１∶０．３２∶１．８６，分别以８３．２８％，８８．３９％，６０．９８％分配在铃中，经济系数为０．４６。

The community development and dynamic of mineral nutrition absorption for high yield plot lint 2.58 T.hm-2of varietyC5 were studied.The results showed that maximal leaf area coefficient was about 2, that transparence was the highest at 12:00-14:00 and about 40% in upper-middle level in full bloom period, 58.23% in middle level and 75.26% in upper level in full boll period,that the amount of absorption of N,P2O5,K2O was 469.5,150.45,874.5 kg.hm-2 and N∶P2O5∶K2O=1∶0.32∶1.86 respectively and 83.28%N,88.39% P2O5,60.98% K2O in boll,that economical coefficient was 0.46.