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《Journal of Soil and Water Conservation》 2017-04
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Effects of Straw and Waste Application on Soil Aggregates and Soil Carbon,Nitrogen and Phosphorus in the Jasmine Garden

ZHU Qiuli;WANG Chun;YAN Jinghua;TONG Chuan;ZENG Yu;WANG Weiqi;Institute of Geography,Fujian Normal University;Minrong Tea Co.,Ltd;Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education,Fujian Normal University;  
In order to study the effects of straw and waste application on the soil aggregates and soil carbon,nitrogen and phosphorus in the riverside jasmine garden in Fuzhou,the distribution and stability of soil aggregates,including 0.25 mm soil aggregates(DR0.25),mean weight diameter(MWD),geometric mean diameter(GMD),fractal dimension(D),and the content and stoichiometric ratio of soil carbon,nitrogen and phosphorus of 0—10,10—20and 20—30cm soil layers were examined in the control(C),straw(S),straw+gypsum(SG),straw+biochar(SB),straw+slag(SS)amendments plots.The results showed that0.053~0.25 mm and 0.25~2mm particles were the predominant contributor.Compared with the control,DR0.25,MWD and GMD under the straw treatments decreased by 19.86%,19.18%,and 37.98%,respectively,whie Dincreased by 14.26%,and aggregate stability decreased.Compared with the straw amendment plots,in the straw+gypsum,straw+biochar,straw+slag treatments plots,both DR0.25 and MWD varied slightly,and GMD increased by 2.34%,0.63%,and 12.67%,respectively,whereas,D was reduced by 2.31%,6.26%,and 5.01% respectively,furthermore,aggregate stability also increased.Compared with control,in the straw,straw+gypsum,straw+biochar,straw+slag treatments plots,carbon,nitrogen and phosphorus content were significantly increased in 0—10cm soil,,however,those in10—20and 20—30cm soil layers varied slightly,showing the accumulation of nutrients to the surface soil layer.In all,the results indicating that biochar and slag can be taken as the combination amendments with straw returning to improve the effect of straw returning.
【Fund】: 国家自然科学基金项目(41571287);; 福州市科技计划项目(2014-G-66 2016-N-86);; 福建师范大学地理科学学院研究生科研创新基金项目(GY201610)
【CateGory Index】: S152.4;S153.6
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