杏棉间作棉花干物质积累分配与养分吸收的分析模拟

在南疆自然生态条件下,研究了杏棉间作对棉花干物质积累及植株养分运移的影响。试验采用Logistic生长函数模拟,拟合效果较好,均成s型曲线。结果表明,间作棉总干物质积累速率最快时刻在出苗后73～99d,快速生长期为35～59d,最大积累量平均为278.79 kg/d。间作棉对N、P2O5、K2O养分吸收强度最大的时刻分别在出苗后56～59、48～62、48～52d,快速积累期为36～38、29～32、39～58d;最大积累量平均分别为3.51、1.47、2.64 kg/d。间作棉盛铃后仍有一部分光合产物、养分输送给茎、叶等营养器官,降低了向蕾铃的分配,将会对产量和品质的产生负面影响。

Simulation of cotton dry matter accumulation and distribution and nutrient absorption in apricot-cotton intercropping system

With the aim of providing a theoretical basis for high efficiency fertilization of cotton in the fruit-cotton intercropping system,the influences of apricot-cotton intercropping cultivation models on the dry matter and nutrient accumulation of cotton were studied under natural ecological conditions in South Xinjiang.The dry matter and nutrient accumulation were fitted by using the Logistic equation.The results show that the fastest accumulation rate of total dry matter of the intercropped cotton is from 73 ...