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[1]LIU Zhe,HAN Jichang,CHEN Qian,et al.Effects of Application of Rice Straw on Distribution and Stability of Aggregates in Different Soil Types[J].Research of Soil and Water Conservation,2017,24(06):167-171,178.

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Effects of Application of Rice Straw on Distribution and Stability of Aggregates in Different Soil Types

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 06 Page number: 167-171,178 Column: Public date: 2017-11-24

Title:: Effects of Application of Rice Straw on Distribution and Stability of Aggregates in Different Soil Types

Author(s):: LIU Zhe^1,2, HAN Jichang^1,2, CHEN Qian^1,2, YU Zhenghong³, ZHANG Weihua^1,2, GAO Hongbei^1,2; 1. Shaanxi Province Land Engineering Construction Group, Xi’an 710075, China;
2. Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Land and Resources of China, Xi’an 710075, China;
3. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China

Keywords:: water-stable aggregates; soil type; aggregate stability; rice straw

CLC:: S152.4⁺81

DOI:: -

Abstract:: An indoor incubation experiment of red soil, aquatic soil and mortar black soil under incubation at 28℃ for 120 days was conducted to study effects of application of rice straw on distribution and stability of water-stable aggregates in three soil types. The results showed that the contents of microaggregates(<250 μm) in three soil types with no-application of rice straw were most and the contents of >2 000 μm macroaggregates were the least, compared with the control, >2 000 μm waterstable aggregates significantly increased under the application of rice straw (p<0.05), while the macroaggregates (>250 μm) became the most, the macroaggregates (>250 μm) of red soil, aquatic soil and mortar black soil increased by 35.6%,41.1% and 22.0%, respectively, compared with the control, the increasing proportion of aquatic soil was the most. At the same time, the mean weight diameter (MWD) and geometric mean diameter (GMD) of water-table aggregates significantly increased (p<0.05), the value of fractal dimension (D) and unstable aggregate index (E_LT) were lower than the control, the structure and erosion resistance of three soil types were obviously improved, while the improvement effects of stability index and aggregate structure of the aquatic soil were the best. The macroaggregates (>250 μm) and GMD,MWD had the significant positive correlation (p<0.001).

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