不同施肥模式对棉田肥料利用率及产量的影响

在大田条件下,以转基因抗虫棉‘沧198’为材料,研究了2种类型肥料(常规肥料、控释肥料)在不同养分水平(100%、80%)下,采用不同施肥方式(常规肥:基施十追施,控释肥:全部基施)对棉花干物质积累、肥料利用效果及产量构成因素的影响.结果表明:相同养分水平条件下,一次性基施控释肥的干物质积累量与常规施肥模式的干物质积累...

Effect of different fertilization models on fertilizer use efficiency and yield in cotton

A field experiment was conducted to study the effect of different fertilization models on cotton dry matter accumulation,fertilizer use efficiency and yield components with the variety of ’cang198’.The results showed that dry matter accumulation of cotton in controlled release fertilizer was significantly different from that of common fertilizer.The maximum of increased dry weight per day of controlled release fertilizer appeared in the period between full-bloom stage and full-boll stage,and still kept relatively high value at late stages.Furthermore,the amount of nutrients accumulation,fertilizer input-output ratio,apparent recovery ratio of N,P and K,agronomic efficiency and absorption efficiency of cotton plants in controlled release fertilizer were also significantly higher than those in common fertilizer treatments,but no obvious difference was found on the dry matter production efficiency.Meanwhile,contribution rate of soil nutrient in controlled release fertilizer decreased.Seed cotton yield results showed that in controlled release fertilizer 100% level treatment,it was 2.80% higher than that of in common fertilizer 100% level treatment.And the seed cotton yield of controlled release fertilizer 80% level treatment was 1.18% lower than that in common fertilizer 100% level treatment.The results indicated that controlled release fertilizer may have not so much effect on cotton yield,but it can increase fertilizer use efficiency significantly and provide sufficient nutrition at middle and late stages.