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[1]QIAO Yunfa,ZHONG Xin,MIAO Shujie,et al.Evaluation Indicators of Soil Quality in Plough Layer of Aeolian Sandy Land in Northeast China Based on Minimum Data Set[J].Research of Soil and Water Conservation,2019,26(04):132-138.

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Evaluation Indicators of Soil Quality in Plough Layer of Aeolian Sandy Land in Northeast China Based on Minimum Data Set

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 132-138 Column: Public date: 2019-06-11

Title:: Evaluation Indicators of Soil Quality in Plough Layer of Aeolian Sandy Land in Northeast China Based on Minimum Data Set

Author(s):: QIAO Yunfa¹, ZHONG Xin¹, MIAO Shujie¹, LI Qi¹, LU Xinchun²; 1. School of Applied Meteorology, Nanjing University of Information Sciences & Technology, Nanjing 210044, China;
2. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China

Keywords:: northeast aeolian sandy soil; soil quality; reasonable plough layer; minimum data set

CLC:: S158.3

DOI:: -

Abstract:: In maize harvest periods in Octobers of years from 2015 to 2017, soil samples of plough layer in aeolian sandy land were collected from 53 sites located in Durbert Mongolian Autonomous County, Heilongjiang Province, northeast China. 21 chemical and physical indicators and maize yields were determined. The minimum data set (MDS) was constructed by cluster analysis, and soil quality characteristics of ploug layer were evaluated with total data set (TDS), SQI-TDS, maize yield and SQI-MDS. The results showed that coefficients of determination (r²) between SQI-MDS and SQI-TDS, maize yield were 0.451 5 and 0.557 9, respectively, indicating that MDS could substitute TDS to evaluate the quality of plough layer soil of aeolian sandy land. Soil fertility was divided into five grades based on MDS with mean value of 0.46, 34.0% of 53 sampling site belonged to grade Ⅳ, 52.8% of them was grade Ⅲ, and 11.2% was grade Ⅱ, no sites fell into in gradeⅠ and grade Ⅴ. Based on maize yield with mean value of 7.6 Mg/hm², soil fertility was also be divided into five grades, the sites belonging to gradeⅠ, gradeⅡ, gradeⅢ, gradeⅣ and gradeⅤ were 1.9%, 18.9%, 41.5%, 35.8% and 1.9% of 53 sampling sites, respectively. All these indicated that SQI-MDS could accurately describe the quality of plough layer in aeolian sandy land, and provide a theoretical basis for soil quality diagnosis and reasonable tillage evaluation of farmland in northeast China.

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