【摘要】 依系统研究法研究高中低三种产量水平杂交棉生长和氮磷钾吸收。结果表明,高产棉的株高与中低产棉差别不大,但主茎增长比中低产棉提前结束,高产棉总铃数明显高于中低产棉,特别在铃位空间分布上更合理;高产棉花的氮磷钾吸收可用Logistic曲线方程表达,拟合良好,快增期、持续时间与中低产棉相比有明显差异,高产棉吸收的N、P2O5、K2O总量为515.3、126.4和591.9 kg.hm-2,大于中低产棉吸收总量;高产棉较中低产棉生长协调性更好,吸收养分总量多。说明南疆棉区在目前生产条件下,应用合理的管理技术措施,能够更有效协调棉花生长和养分分配,实现棉花大面积高产。更多还原

【Abstract】 The systematic study was employed to study the growth characteristics and the accumulation law of N,P,K nutrients.Three treatments were designed in cotton fields including low-yield,medium-yield,high-yield cottons.Results showed that the stem length of high-yield cotton had no such changes with medium-yield and low-yield cottons,but the stem increase of high-yield cotton stopped before medium and low yield cottons.The numbers of total bolls for medium and low yield cottons were much lower than the high-yield,and the spatial distribution of bolls for the high-yield cotton was more reasonable.The accumulations of N,P2O5,K2O in cotton plant could be described by the Logistic curve equation.Compared to the medium and low yield cottons,the fast increase period and the sustained time of the high-yield cotton were obviously discrepant.The total accumulations of Nitrogen,phosphorous and potassium for the high-yield cotton were 515.3,126.4,591.9 kg·hm-2,respectively.Compared to the medium and low yield cottons,the nutrient coordination of the high-yield cotton was better,and the total uptake nutrient was more.These showed that it is possible to achieve large-scale high-yield cotton by reasonable application of cultural factors in the South Xinjiang cotton district.更多还原