南疆滴灌高产杂交棉花干物质和氮磷钾积累模拟分析

研究南疆覆膜滴灌条件下高产杂交棉干物质和氮磷钾养分的积累规律。结果表明皮棉3000 kg/hm2高产条件下,棉花总干物质和生殖器官干物质积累速率最快时间在出苗后的107~108和117~118 d;棉株吸收N、P2O5、K2O的快增期分别在出苗后66~153、55~126和62~126 d。高产杂交棉地上部总干物质和生殖器官干物质积累量分别为102.51和62.27 g/株,吸收积累氮磷钾养分的总量换算为N、P2O5、K2O分别为515.3、126.4和591.9 kg/hm2,每生产100 kg皮棉需吸收氮磷钾比例N∶P2O5∶K2O=1∶0.25∶1.15。

Simulation Analysis of Dry Matter and N,P2O5,K2O Accumulation of Hybrid Cotton in South Xinjiang

The dry matter and N,P2O5,K2O accumulation of hybrid cotton were studied in South Xinjiang.The results showed that the cotton total dry matter and reproductive organs dry matter accumulation rates were the fastest at 107～108 days and 117～118 days after sprout.The nutrient N accumulation rates were faster at 66～80 days after sprout.The nutrient P2O5,accumulation rates were faster at 55 ～ 126 days after sprout.The nutrient K2O accumulation rates were faster at 62～126 days after sprout.The accumulation of the aboveground part and the reproductive organs dry matter of high yield cotton are 102.51 g/plant and 62.27 g/plant. The accumulations of nutrient N,P2O5,K2O are 515.3 kg/hm2,126.4 kg/hm2,591.9 kg/hm2,N,P2O5,K2O=1∶0.25∶1.15 were needed for producing 100 kg lint under the super high yield condition of 3 000 kg/hm2in South Xinjiang.