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[1]LI Wen-juan,YAN Yong-hao,ZHENG Ji-yong,et al.Effect of Biochar on the Transfer of Nitrate in Three Different Soils on the Loess Plateau[J].Research of Soil and Water Conservation,2013,20(05):60-63,68.

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Effect of Biochar on the Transfer of Nitrate in Three Different Soils on the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 05 Page number: 60-63,68 Column: Public date: 2013-10-28

Title:: Effect of Biochar on the Transfer of Nitrate in Three Different Soils on the Loess Plateau

Author(s):: LI Wen-juan¹, YAN Yong-hao¹, ZHENG Ji-yong^1,2, ZHANG Xing-chang^1,2, LI Shi-qing^1,2; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: Loess Plateau; soil; biochar; nitrate; transfer

CLC:: S153.6⁺1

DOI:: -

Abstract:: To determine how addition of biochar can restrain the leaching of soluble nutrients in farmland soil on the Loess Plateau, the simulation experiments were used to study the effect of biochar made from apple tree’s branches with three addition rates on transfer of nitrate in three soils with different texture from the Loess Plateau through comparing BTCs (Break throught curve, BTC), by means of soil colume simulation in the steady contion in lab, and provide the scientific basis for non-point source pollution control and the nitrogen cycle research. The continuous flow analyzer (SKALAR-SAN) was used to measure sap nitrate concentration, nitrate breakthrough curves were analyzed under steady state conditions, biochar addition and different amounts of nitrate in soil migration. The results showed that biochar can restrain the leaching of nitrate in soils with coarse texture such as leossial soil and sandy soil, moreover, the restrain function would increase with the biochar addition rate. However, the biochar showed the acceleation function on leaching of nitrate in clay loam soil, and this function would increase with the addition rate. After biochar additon, the nitrate transfer in soils can be described by convective-disppersive equation (CDE). Studies have shown that adding biochar in soil with different textures different effects on soluble nutrients can promote capacity of coarse texture soil to keep the nutrients, but not be conducive to nitrate nutrient retention in the fine soil with more sticky texture.

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