交替隔沟灌溉下施肥方式对高粱产量及氮素利用率影响

摘要

To explore the effect of fertilization modes in conditions of alternate furrow irrigation on yield and N fertilizer utilization efficiency in sorghum, study was carried out in randomized block design. The results showed that in conditions of alternate furrow irrigation, N fertilizer single basal application could be applied, but the yield and nitrogen utilization rate reduced; While 30% nitrogen as base fertilizer and 70% top dressing at jointing stage, significantly improved yield and nitrogen efficiency. Compared with traditional fertilization method, yield increased by 10.8% and the utilization rate of nitrogen increased by 22.7%.%为探索高粱在交替隔沟灌溉条件下不同施肥方式对产量及氮素利用率的影响,采用随机区组设计进行了研究.结果表明,交替隔沟灌溉条件下,氮素可以一次性底施,但高粱产量和氮素利用率有所降低；将氮素总量的30％底施,70％拔节期追施,则可明显提高高粱产量和氮素利用率,与传统种植法相比,产量提高10.8％,氮素利用率提高22.7％.