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Title:: Effect of Topsoil Treatment on Characteristics of Soil Aggregates of Soybean Field and Soybean Yield

Author(s):: HE Song-yu¹; LIU Jian-sheng²; ZHANG Ming-cong¹; JIN Xi-jun¹; HU Guo-hua¹; ZHAN Ying-ce¹; ZHAO Jin-xing¹; ZHANG Yu-xian¹; (1.College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China; 2.Jianshan Farm of Heilongjiang Province, Nenjiang 161442, China )

Keywords:: Soybean; Topsoil treatment; Water stability aggregate; Yield

PACS:: S565.1

DOI:: 10.11861/j.issn.1000-9841.2018.02.0251

Abstract:: In order to demonstrate the effect of conventional tillage system with topsoil treatment on the soil physical properties and soybean yield, adopting the method of regional contrast, setting two treatments(T1 represents local conventional tillage measures, T2 represents conventional tillage measures + topsoil soil crushing treatment) to analyze the influence on soil temperature and humidity, the bulk density, porosity, water stability, the aggregate in 0-30 cm soil depth and soybean yield. The results showed that T2 treatment significantly decreased 0-10 cm soil bulk density with a decline of 6% to 13.8%, significantly increased the porosity of soil layer between 0-10 cm, with 3.83% to 8.40%, reduced 5-15 cm soil temperature with a decline of 0.2 to 1.3 centigrade, improve 5-15 cm soil moisture with an increase from 0.1% to 1.5%, significantly increase the number of large aggregate (R>0.25 mm) by 9.02% to 20.30%. The mean weight diameter(MWD) and the geometric mean diameter(GMD) of soil water stability agglomeration increased by 4.25% to 6.58% and 28.4% to 30.3% respectively, while soybean yield increased by 6.24%. The results showed that topsoil crushing treatment could reduce topsoil bulk density, increase topsoil porosity, increase soil bulk aggregate number, increase soil water stability and provide a better soil environment for crop growth.

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Effect of Topsoil Treatment on Characteristics of Soil Aggregates of Soybean Field and Soybean Yield(PDF)

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