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[1]CHEN Xiao-ge,MA Yao-guang.Effect of Different Irrigation Water and Nitrigen Rate on Transfer and Leach Soil NO3--N in Loess Soil[J].Research of Soil and Water Conservation,2008,15(05):109-111,115.

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Effect of Different Irrigation Water and Nitrigen Rate on Transfer and Leach Soil NO₃^--N in Loess Soil

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 05 Page number: 109-111,115 Column: Public date: 2008-10-20

Title:: Effect of Different Irrigation Water and Nitrigen Rate on Transfer and Leach Soil NO₃^--N in Loess Soil

Author(s):: CHEN Xiao-ge, MA Yao-guang; College of Water Conservancy and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: loess soil; irrigation; NO₃^--N transport; nitrogen leaching effect

CLC:: S153.61

DOI:: -

Abstract:: Soil infiltration experiment was carried out to study the effect different irrigation water and nitrogen rate on transfer and leach soil NO₃^--N in loess soil. The results indicated that soil water content increased with irrigation water quantity increase. In large irrigation quota, soil moisture downward migration rapidly in nearly saturated soil layer, nitrogen leach seriously. Under conditions of small irrigation quota, soil moisture in 0-35 cm reduced significantly, not occurring nitrogen leaching. When nitrogen rate is certain, NO₃^--N content in soil profile decreases with the increasing of irrigation content and have significantly increasing trend with the increased depth of soil. NO₃^--N content in soil profile have an increasing trend with increase of the nitrogen rate, and soil moisture is inversely relation with soil NO₃^--N content. There have a positive correlation of soil nitrogen accumulation with the nitrogen rate, soil depth and infiltration time, and have a negative correlation with irrigation water good quantity, which can be described with multiple non-linear model. So in order to reduce nitrogen leaching losses, and consider the economic and environmental benefits, the reasonable rate of irrigation and application N were 80 mm and 1.80 mg/cm² respectively in loess soil.

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