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[1]YAO Jun,TANG Chong-xia,HE Bing-hui.Effects of Different Fertilization Level on N-losses alone with Surface Runoff on Slope Land of Purple Soil[J].Research of Soil and Water Conservation,2010,17(02):54-57.

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Effects of Different Fertilization Level on N-losses alone with Surface Runoff on Slope Land of Purple Soil

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 02 Page number: 54-57 Column: Public date: 2010-04-20

Title:: Effects of Different Fertilization Level on N-losses alone with Surface Runoff on Slope Land of Purple Soil

Author(s):: YAO Jun, TANG Chong-xia, HE Bing-hui; College of Resources and Environment, Key Laboratory of Eco-environments in Three Gorges Region (Ministry of Education) Southwest University, Chongqing 400715, China

Keywords:: purple soil; fertilization level; loss amount; loss conficient

CLC:: S157

DOI:: -

Abstract:: Through monitoring the runoff in plots, the N-loss was studied under different fertilization levels with winter wheat-summer maize rotation on the slope land of purple soil. The results showed that the amount of runoff was consistent with rainfall. Under the same fertilization level (583.20 kg/hm²), for the conventional treatment, the TN, NO₃-N and NH₄-N did not change significantly; the coefficients of N-loss are as follows: 1.82% with conventional treatment, 2.66% with optimization treatment and 0.51% under cross-ridge. Compared with optimization treatment and conventional treatment, the TN, NO₃-N and NH₄-N reduced 60.4%, 73.2%, 53.9% and 28.8%,10.4%,-12.4%, separately under cross ridge treatment. Under the same plantation mode, incremental treatment (fertilizer increase 50%), the N-loss coefficient is 2.46% and the TN, NO₃-N and NH₄-N increased 23.3%, 11.1%, 69.1% compared with optimization treatment. The results also showed that the disturbance under external factors such as little precipitation and a heavy rainfall shortly after fertilization, will increase the N-loss significantly, and the loss increased with increasing fertilization.

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