控施氮肥与尿素配施对玉米生长、养分吸收及产量的影响

本文通过田间试验,研究几种控释肥与尿素的配施对玉米干物质积累、氮素吸收及产量的影响。结果表明,与不施氮处理(CK)相比,施用氮肥具有显著的增产效果,控释氮肥70%与普通尿素30%处理(CRU70%)的玉米产量显著高于普通尿素100%(CRU0%),增产6.0%,在成熟期,CRU70%处理的地上部干物质积累量和氮素积累量均显著高于CRU0%,处理CRU 70%的氮肥当季回收率,农学效率和偏生产力均显著高CRU 0%处理,分别提高20.8%、36.5%、6.1%。综合玉米产量、养分吸收利用及经济效益,控释氮肥70%与普通尿素30%配施可发挥两种氮肥的优势,获得显著的增产效果,提高经济效益。

Effect of different ratios of controlled-release nitrogen fertilizer and urea on growth, nutrition absorotion and yield of maize

The field experiment was carried out to study the effect of maize dry matter accumulation, nitrogen uptake and yield on several ratios of controlled-release nitrogen fertilizer and urea. The results showed that compared with CK treatment, nitrogen fertilizer application had increased yield significantly, the yield of 70% controlled-released nitrogen fertilizer and 30% urea (CRU70%) treatment was significantly higher than urea100%(CRU0%) by 6.0%, the shoot dry matter accumulation and nitrogen accumulation of CRU70% treatment were all higher than CRU0%, the nitrogen recovery efficiency, agricultural efficiency and partial factor productivity also were higher than CRU0% treatment by 20.8%, 36.5% and 6.1% respectively. According to the performance of maize yield, nutrition absorption and utilization and economic benefit, the combination of 70% controlled release nitrogen fertilizer and 30% common urea could have the advantages of two type style of nitrogen fertilizer, achieved significantly effect on yield, and increased economic benefit.