TY  - JOUR
T1  - Evaluating Optimum Nitrogen Management Associated with Production and Environmental Load of Farm-Systems in the Dahuofang Reservoir Region
AU - , Lei Liang AU - , Ning Hu AU - , Da Tian Jin AU - , Lu Lu Zhao 
JO  - Environmental Research Journal
VL  - 2
IS  - 5
SP  - 265
EP  - 270
PY  - 2008
DA  - 2001/08/19
SN  - 1994-5396
DO  - erj.2008.265.270
UR  - https://makhillpublications.co/view-article.php?doi=erj.2008.265.270
KW  - Agricultural systems
KW  -N balance
KW  -N Cycling index
KW  -N management
AB  - N budgets analysis model offers a new set of tools for evaluating the N cycling in Agricultural systems. Cycling Index (CI) is also a useful tool for estimating optimal N flows in farms and Application Index (AI) as a good indicator for characterizing the N flows in farms. Using these parameters, we analyzed all farm-systems to estimate the optimal N Management for safety N pollution in ground water and maximizing N export in the Dahuofang Reservoir region. It was clearly shown the critical N application rate (chemical fertilizer + manure) was 208.4 kg N ha <SUP>1</SUP> y <SUP>1</SUP>. The critical inter-system input (application N, imported food and feed N and natural supplied N) was 422.5 kg N ha <SUP>1</SUP> y <SUP>1</SUP>.
ER  -