摘要
为研究造粒处理工艺对有机肥养分释放动态的影响,设置了颗粒有机肥与粉状有机肥不同施肥方式处理,通过测定肥料施入淹水土壤后土壤渗漏液中硝态氮、铵态氮、无机磷、钾的含量变化,研究施颗粒有机肥与粉状有机肥处理在淹水土壤中的养分淋漏特性。结果表明,有机肥进行造粒处理后在一定程度上增强了肥料的缓释性能;颗粒状肥料与粉状肥料在养分溶出与渗漏方面存在一定差异,施用颗粒状肥料可以明显减少硝态氮和无机磷的渗漏损失。
In order to verify the effects of granulation on nutrient release from organic fertilizers,different fertilization treatments with coated organic fertilizer and uncoated organic fertilizer was conducted.By determining the content of NO3^--N,NH4^＋-N,inorganic P and K in leaching solution,the nutrient release characteristics of granulated and powdery fertilizers in waterlogged soil conditions were study.The results showed that granulation could increase the slow-release ability of the organic fertilizers.Some differences were found in nutrient release and leaching behaviors between granulated and powdery fertilizers,the leaching loss of NO3^--N and inorganic P decreased significantly with the use of granular fertilizers.
出处
《天津农业科学》
CAS
2008年第4期30-33,共4页
Tianjin Agricultural Sciences
基金
农业部948项目(2006-G60)
江苏省环境材料与环境工程重点实验室开放基金
关键词
造粒
颗粒有机肥
缓释
渗漏
granulation
granulated fertilizers
slow-release
leaching
