| Effects of tillage methods and straw return on soil properties, metabolism of microbial carbon source and wheat yield |
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| DOI：10.7606/j.issn.1000-7601.2019.06.21 |
| Key Words: tillage methods returning straw to field soil properties soil microbial carbon source metabolism capacity wheat |
| Author Name | Affiliation | | WEI Anpei | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | DING Wenchao | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | HU Hengyu | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | SUI Yewei | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | LIU Shaomei | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | CHEN Ziming | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China | | LI Jing | Key laboratory of soil and water conservation and environmental conservation in Shandong Province, College of resources and environment, Linyi University, Linyi, Shandong 276000, China |
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| Abstract: |
| Using wheat 22 as test material, this experiment adopted a split\|plot design, with tillage methods as main treatments including conventional tillage (C), subsoiling (S) and rotary tillage (R), with straw returning amount as sub treatments including straw returning (P) and no straw returning(A).We used Biolog Eco technology to measure metabolism function of carbon source of soil microorganisms, and analyzed basic physical and chemical properties of soil and crop yield. The results showed that, subsoiling and straw returning significantly enhanced soil water and organic carbon content, with 0~15 cm soil layers increased by 9.78% and 24.00%, 15~30 cm soil layers increased by 7.08% and 15.81%, respectively. Also, subsoiling increased the pH in 15~30 cm soil layer by 6.67%, and straw returning increased the pH of 0~15 cm soil layer by 4.32%. Subsoiling and straw returning significantly increased the metabolic diversity (richness index, aroma diversity index) and carbon metabolism intensity, 0~15 cm soil layer increased by 26.84%, 3.84% and 38.02%, and 15~30 cm soil layer increased by 11.87%, 3.63% and 14.74%, respectively. Principal component analysis showed that the metabolic functions of carbon source between AC and AR were similar, and the metabolic functions of carbon source between PC and PS were similar in 15~30 cm soil layer. Both subsoiling and straw returning significantly increased wheat yield by 5.82% on average, and the microbial carbon metabolism function had a very significant correlation with wheat yield. |
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