西北农业学报2025，Vol.34Issue(10)：1847-1855,9.DOI:10.7606/j.issn.1004-1389.2025.10.008
秸秆带状覆盖对旱作马铃薯田土壤团聚体有机碳及其产量的影响
Effects of Straw Strip Mulching on Organic Carbon Associated with Soil Aggregates and Tuber Yield of Potato in Dryland Farming System
摘要
Abstract
To investigate the effects of straw strip mulching on soil aggregate distribution,changes in organic carbon content and potato yield in the semi-arid region of Northwest China,four treatments were implemented in the experiment:flat field without mulching(CK),2-row straw strip mulching(SSM1),3-row straw strip mulching(SSM2)and plastic film mulching(PFM).(1)Compared with CK,straw strip mulching(SSM1 and SSM2)significantly increased the content of water-stable aggre-gates＞0.25 mm in the 0-40 cm soil layer by 22.0％to 30.2％,whereas,the effect of plastic film mulching showed the opposite result.(2)Compared with CK,straw strip mulching(SSM1 and SSM2)significantly increased the mean weight diameter(MWD)and geometric mean diameter(GMD)values by 22.0％and 1.8％,respectively,in the 0-40 cm soil layer;In contrast,MWD values were signifi-cantly reduced by 21.0％and the soil aggregate destruction rate increased by 5.0％under plastic film mulching.(3)Straw strip mulching(SSM1 and SSM2),in comparison with CK,increased the organic carbon content associated with soil aggregate in the 0-20 cm soil layer by 19.9％,30.1％and 45.8％in the＞2 mm,0.25-2 mm and＜0.25 mm size fractions,and had no significant difference in the 20-40 cm soil layer,However,the effect of plastic film mulching on the organic carbon content associ-ated with soil aggregates in each soil layer was not significant.(4)Compared with CK,straw strip mulching significantly increased the contribution of soil aggregates of＞2 mm grain size in the 0-20 cm soil layer to soil organic carbon by 15.3％to 24.4％and had no significant effect on the other two sizes;plastic mulching significantly reduced the soil organic carbon contribution of＞0.25 mm by 57.9％.In the 20-40 cm soil layer,the mulching treatments did not significantly influence the contri-bution rate of organic carbon to soil aggregates in each size class.(5)Compared with CK,all mulching treatments increased both fresh and dry tuber yields,with the order of effectiveness being SSM1＞PFM＞SSM2.Correlation analysis revealed that the organic carbon content in＜0.25 mm aggregates and the content of＞2 mm soil aggregates were the main factors influencing potato yield(r=0.74**and r=0.72**).Based on the above results,straw strip mulching improves the content of large soil aggregates in the shallow soil layers,enhances soil structure,and increases the organic carbon content in aggregates of different grain sizes,and contributes significantly to carbon sequestration and yield improvement.Therefore,it is suitable for promotion and application in the semi-arid regions of North-west China.关键词
秸秆带状覆盖/地膜覆盖/土壤团聚体/土壤有机碳/马铃薯Key words
Straw strip mulching/Plastic mulching/Soil aggregate/Soil organic carbon/Potato引用本文复制引用
朱艳艳,宋文欢,马臻,李博文,韩凡香,柴雨葳,程宏波,黄彩霞,常磊..秸秆带状覆盖对旱作马铃薯田土壤团聚体有机碳及其产量的影响[J].西北农业学报,2025,34(10):1847-1855,9.基金项目
甘肃省高等学校产业支撑计划(2025CYZC-058,2022CYZC-48) （2025CYZC-058,2022CYZC-48）
国家重点研发计划(2022YFD2001304,2021YFD1900700) （2022YFD2001304,2021YFD1900700）
甘肃省技术创新引导计划(22CX8NA046). University Industry Support Program of Gansu Province(No.2025CYZC-058,No.2022CYZC-48) （22CX8NA046）
National Key Research and Development Program of China(No.2022YFD2001304,No.2021YFD1900700) （No.2022YFD2001304,No.2021YFD1900700）
Gansu Provincial Technology Innovation Guidance Program(No.22CX8NA046). （No.22CX8NA046）
