CRU has the function of controlling nutrient release , so the leaching loss of CRU mainly took place at nutrientreleasing peak period.
控释尿素山于具有控制氮素释放的功能，其淋失过程主要发生在养分释放的高峰期。
2
Taking membrane wrapping control-releasing fertilizer as testing material, through static water releasing test, its nutrientreleasing rate was measured.
以包膜控释肥为试验材料，通过静水释放试验测定其养分释放速率。
3
The reasons of low use efficiency of fertilizer and serious pollution are the imbalance between fertilizer releasingnutrient and crop requirement.