摘要
通过在余杭等５个地点田间试验以及在杭州本院的田间微区、１５Ｎ示踪、大型渗漏计及室内模拟试验，探讨了高效覆膜尿素在不同土壤类型上对水稻的增产效应及增产机理，并就其氮素利用率、氮素转换率、氮肥挥发损失以及渗漏淋洗损失等与普通尿素作了对比研究。确认该种尿素与等氮量普通尿素相比在水稻上有显著增产效果，并可减少氮肥的气态及淋洗损失，从而有效地减轻氮肥对环境的污染。
A series of experimental studies including five sites field experiments and field microplot experiments, 15 N tracer experiments, large lysimeter test as well as laboratory experiment were conducted at six locations in Zhejiang ricefields in 1994 to determine the effect of high efficiency polymer-coated urea (SUN) on rice yield and its mechanism as well as the effect of SUN on the recovery, productive efficiency, ammonia volatilization loss and leaching loss as compared with common urea. The result indicated that there is a high significant enhance effect on rice grain yield by using SUN and a reducing effect on the nitrogen losses (both NH 3 volatilization and NO - 3 leaching) of urea as comparison with common urea. Therefore, SUN may be of benefit to fertilizer economy and environment conservation.
出处
《浙江农业学报》
CSCD
1996年第1期24-29,共6页
Acta Agriculturae Zhejiangensis
关键词
缓效氮肥
覆膜尿素
水稻
增产效应
Slowly release nitrogen fertilizer
Polymer-coated urea
Environment conservation
