造粒工艺对商品有机肥养分释放动态的影响

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。

Effects of Granulation Process on Nutrient Release of Orgaiuic Fertilizers

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.