Effects of Growing of Different Types of Crops on Constitution of Soil Available Nitrogen and Transformation and Utilization of Nitrogen Fertilizer
ZENG Ke
YANG Lanfang
YU Jing
LI Binbo
WANG Zhengxiang
Abstract：The soybean,cotton,maize and sorghum were planted in pot under low nitrogen,high nitrogen treatments,the soil available nitrogen constitution and transformation and utilization of nitrogen fertilizer were determined,so as to provide technical guidance for reasonable use and improving use efficiency of nitrogen fertilizer for different types of crops.Compared with the control with nitrogen but unplanted crop,growing soybean,cotton,maize,sorghum significantly decreased the soil available N contents by 53.48％,51.54％,33.10％,55.03％,and influenced the constitution of soil available N.Thereinto,growing soybean,cotton,maize and sorghum significantly decreased soil inorganic N contents by 85.41％,83.09％,70.89％ and 83.35 ％,but increased soil hydrolysable organic N contents by 1.41,1.53,2.11 and 1.28 times,respectively;growing soybean,cotton,maize and sorghum significantly decreased the rate of soil inorganic N to available N by 68.61％,65.09％,56.47％ and 63.00％,but increased the rate of soil hydrolysable organic N to available N by 4.18,4.21,3.66 and 4.08 times,respectively.Compared with the control,growing soybean,cotton,maize and sorghum significantly increased the transform rate of ammonium nitrogen fertilizer by 93.66％,38.19％,32.58％ and 38.31％ respectively,and growing soybean treatment had the highest increasing range;the nitrification rates of ammonium nitrogen fertilizer of growing soybean,cotton,maize and sorghum treatments were negative values,and growing soybean treatment had the highest decreasing amplitude.The ammonium nitrogen fertilizer use efficiency of growing soybean,cotton,maize and sorghum treatments were 52.01％,28.31％,24.16％ and 28.40％ respectively,and growing soybean treatment had the highest value.In conclusion,growing crops suppressed the soil nitrification and accelerated the development of soil hydrolysable organic nitrogen by the utilization of soil available nitrogen and the alteration of soil environment,and hence impacted the constitution of soil available nitrogen and the transform and use of ammonium nitrogen applied in soil.Leguminous crops had stronger ability of suppressing nitrification,making use of ammonium compared with non-Leguminous crops.
Keywords：growing of cropsavailable nitrogenammonium nitrogennitrate nitrogenhydrolysable organic nitrogennitrogen fertilizer use efficiency
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 58-63 )