Release Characteristics of Available Nutrients from Some Selected Chemical Fertilizers

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Abstract Release characteristics of available nutrients from chemical fertilizers are important to judge release capabilities of fertilizers.At the same time,they are important to evaluate environmental pollution on using chemical fertilizers.In this paper,a comparative study of the release characteristics(N,P,K) of available nutrients from some selected compound fertilizers,such as(NH_4)_2HPO_3,CO(NH_2)_2,KCl,was performed using a method of the release of available nutrients at constant solution flow in self-device of release characteristics of available nutrients from chemical fertilizers.The obtained results indicated that in all cases,the available nutrient releases took place in four stages:in the first stage,the release characteristics of available nutrients are very fast;in the second and third stage,they are slow and persistent time is long;in the last stage,they are fast and persistent time is short,which were characterized by their slopes and durations.

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Received 2006-03-15; published 2006-03-15

Cite this article:

ZHANG Yi-min,JIANG Hui,WANG Hong.Release Characteristics of Available Nutrients from Some Selected Chemical Fertilizers[J] Chemcial Industry and Engineering, 2006,V23(2): 110-113

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