Release Characteristics of Available Nutrients from Some Selected Chemical Fertilizers
ZHANG Yi-min,JIANG Hui,WANG Hong(Key Laboratory for Green Chemical Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)
(Key Laboratory for Green Chemical Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
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.
ZHANG Yi-min,JIANG Hui,WANG Hong.Release Characteristics of Available Nutrients from Some Selected Chemical Fertilizers[J]. Chemcial Industry and Engineering, 2006,23(2): 110-113
[1]
NOTARIO DEL PINO J S,ARTEAGA PATRON I J,GONZALEA MARTIN M M.Phosphorus and potassiumrelease from phillipsite-based slow-release fertilizers[J].Journal of Controlled Release.1995,34:25-29
[2]
AHNED AKELAH.Novel utilizations of conventionalagrochemicals by controlled release formulations[J].Materials Science and Engineering.1996,4:83-98
DOU H,ALVA A K.Nitrogen uptake and growth of twocitrus rootstock seedlings in a sandy soil receiving differentcontrolled-release fertilizer sources[J].Biol Fertil Soils.1998,26:169-172
MARIA TOMASZEWSKA,ANNA JAROSIEWICZ,KRZYSZTOF KARAKUSKI.Physical and chemicalcharacteristics of polymer coatings in CRF formulation[J].Desalination,2002,146(3):19-23.
2006, Vol. 23 
