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Estimation parameters of nitrogen balance in stock farming system of China

LIU Xiaoli1,2;XU Junxiang1;WANG Fanghao2;ZHANG Fusuo2;MA Wenqi1   

  1. 1College of Resources and Environmental Sciences,Agricultural University of Hebei,Baoding 071001,China;2Key Laboratory of Plant-Soil Interactions, MOE,College of Resources and Environmental Sciences,China Agricultural University,Beijing 100094,China

  • Received:2005-03-07 Revised:2005-07-04 Online:2006-03-18 Published:2006-03-18

Abstract: The study of nitrogen (N) balance in stock farming system is the basis of nutrient management in animal husbandry production,and the determination of N cycling parameters is the foundation of this study.Through documents checking and data collecting,this paper analyzed the items and values of input/output parameters of N cycling in stock farming system,and ascertained the estimation parameters of N balance in the system,which could offer the theoretical foundation for nutrient management in animal husbandry production.

Key words: soil organic carbon, desert grassland, anthropogenically introduced shrub, shrub encroachment., spatial prediction