研制了一种低成本缓释化肥，并对其养分缓释性能及养分释放规律进行了研究。
A lower cost slow-release fertilizer is prepared, and its slow-release capability and release characteristics of nutrient content are studied.
影响化肥利用率的因素较多，除使用不当外，还有化肥养分释放不符合作物需肥规律，如养分释放过快使作物来不及吸收而损失等。
There are many factors affecting the fertilizer efficiency, beside the improper application, the different nutrient release from the crop's demand, eg.
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