番木瓜缓释肥料的养分释放特性研究

Study on Nutrient Release Characteristics of Papaya Slow-Release Fertilizers

[目的]评价4种番木瓜缓释肥料养分释放特性。[方法]采用水溶出率法,参照我国2009年实施的《缓释肥料》评价标准,评价4种番木瓜缓释肥料养分释放特性。[结果]缓释肥料SRF-1氮素养分的初期溶出率高于15%,SRF-2钾素养分的初期溶出率高于15%,SRF-3、SRF-4氮磷钾素养分的初期溶出率均低于15%。SRF-1、SRF-2、SRF-3、SRF-4氮磷钾素养分28 d累积释放率低于80%,90 d累积释放率高于80%。[结论]缓释肥料SRF-3、SRF-4养分释放特性符合我国2009年实施的《缓释肥料》评价标准。

[Objective] The experiment aimed to evaluate nutrient release characteristics of four papaya slow-release fertilizers.[Method] Water extraction method was applied to evaluate nutrient release characteristics of four papaya slow-release fertilizers according to Chinese slow release fertilizer evaluation standard enforced on 2009.[Result] Nitrogen（N） nutrient preliminary solubility rate of SRF-1 was higher than 15%,potassium（K） nutrient preliminary solubility rate of SRF-2 was also higher than 15%.The N,phosphorin（P） and K nutrient preliminary solubility rate of SRF-3 and SRF-4 were lower than 15%.28 days＇ accumulation release ratio of SRF-3 and SRF-4 were lower than80%,and their 90 days＇ nutrient accumulation release ratio were higher than 80%.[Conclusion] The nutrient release characteristics of SRF-3 and SRF-4 were in accordance to the Chinese slow release fertilizer evaluation standard enforced in 2009.