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Experimental Study on Estimating Fertilizer Value of Swine Slurries
Yang Zengling,Han Lujia #,Liu Yi,Piao Xiangshu
China Agricultural University
*Correspondence author
#Submitted by
Subject:
Funding: 教育部博士点基金（No.20040019039）
Opened online:15 March 2004
Accepted by: none
Citation: Yang Zengling,Han Lujia,Liu Yi.Experimental Study on Estimating Fertilizer Value of Swine Slurries[OL]. [15 March 2004] http://en.paper.edu.cn/en_releasepaper/content/470
 
 
his experiment is composed of two parts. The first one is to study the relationships between nutrient contents and physical properties of swine slurries in order to rapidly estimate fertilizer value of swine slurries. Analytical results of this experiment show that slurry fertilizer value can be estimated by two main physical parameters: electrical conductivity (EC) and specific gravity (SG). Electrical conductivity (EC) can be evaluated for estimating ammoniacal nitrogen and potassium in pig feces, in pig urine and in pig manures; specific gravity (SG) can be evaluated for estimating total nitrogen in pig feces, in pig urine, in pig manures and phosphorus in pig manures. The second one is to study the relationships between nutrient contents and nutrients intake is to estimate fertilizer value of raw swine slurries. Data of nutrient contents in diets and in slurries were obtain by feeding experiment and analyzed. One-way ANOVA analytical results of this paper show that the effect of d
Keywords:pig slurries; fertilizer value; estimate; electrical conductivity (EC); specific gravity (SG); mathematical model; nutrients intake
 
 
 

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