首页|秦岭中段北麓农耕地秸秆还田对土壤团聚体及可蚀性季节性变化的影响

秦岭中段北麓农耕地秸秆还田对土壤团聚体及可蚀性季节性变化的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
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选取秦岭中段北麓陕西关中地区典型农业土壤塿土,添加小麦、大豆、玉米秸秆,并选择无秸秆添加作为对照.秸秆混入375 d,共采集样品11次,探究秸秆混入对团聚体特征及可蚀性季节性变化的影响.结果表明:(1)土壤有机质呈现明显的季节性变化,随着秸秆混入时间的延长,土壤有机质含量呈上升趋势;与混入前相比,实验结束时添加小麦、大豆、玉米秸秆的处理有机质含量分别提高了 19.56％、18.28％、18.61％.(2)秸秆混入降低了小于1 mm团聚体比例,增加了大于1 mm团聚体占比;与混入前相比,实验结束时添加小麦、大豆和玉米秸秆三种处理的平均重量直径(MWD)分别提高了 67.31％、68.53％、56.98％,几何平均直径(GMD)分别提高了 45.77％、35.00％、40.25％.(3)与裸地相比,混入秸秆样地的土壤可蚀性值均显著降低,添加小麦、大豆、玉米秸秆处理的土壤可蚀性平均值分别降低了 28.92％、23.33％、26.40％.研究结果探明了秸秆混入对土壤团聚体特征和土壤可蚀性的季节性变化的影响,对我国南北过渡带水土流失区农业生产实践具有重要的参考价值.
Effects of Straw Returning on Soil Aggregate and Seasonal Variation in Soil Erodibility for Agricultural Area in the Northern of the Middle of Qinling Mountains
A typical agricultural small soil in the mid-northern foothills of the Qinling mountains-Guanzhong region of Shaanxi province was selected with wheat,soybean and maize straw additions and no straw addition as a control.Samples were collected 11 times over 375 days to investigate the effects of straw addition on seasonal changes in agglomerate properties and erodibility.The results showed that:(1)The soil organic matter showed obvious seasonal changes,with the extension of the time of straw mixing,the soil organic matter content showed an upward trend;compared with the pre-mixing,the organic matter content of the treatments with wheat,soybean and maize straw added at the end of the experiment increased by 19.56％,18.28％and 18.61％,respectively.(2)Straw incorporation decreased the proportion of agglomerates smaller than 1 mm and increased the proportion of agglomerates larger than 1 mm;compared to the pre-mixing period,the MWD of the three treatments with wheat,soybean and maize stover at the end of the experiment increased by 67.31％,68.53％and 56.98％,respectively,and the GWD increased by 45.77％,35.00％and 40.25％,respectively.(3)The soil erodibility values of the straw-mixed sample plots were significantly reduced compared to the bare soil,and the mean soil erodibility values of the wheat,soybean and maize straw-mixed treatments were reduced by 28.92％,23.33％and 26.40％,respectively.The results of demonstrated the effects of straw mixing on the seasonal changes of soil aggregate properties and soil erodibility,which is of great practical value for agricultural production practice in the soil erosion zone of the north-south transition zone in China.

straw returning to fieldsoil aggregatesoil erodibilityan average weight diameter(MWD)

崔越、刘明华、李秀美、莫佳佳

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信阳师范大学地理科学学院,河南信阳 464000

信阳师范大学文学院,河南信阳 464000

信阳师范大学信阳市气候变化与环境演变重点实验室,河南信阳 464000

西北农林科技大学水土保持科学与工程学院,陕西杨凌 712100

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秸秆还田 团聚体 土壤可蚀性 平均重量直径(MWD)

国家自然科学基金项目河南省科技攻关计划项目河南省高校人文社会科学研究一般项目信阳师范大学青年科研基金项目信阳师范大学2023年度校廉政专题研究项目

419011052221023201282024-ZZJH-2162300632324

2024

10.3969/j.issn.1003-0972.2024.03.006

信阳师范学院学报(自然科学版)
信阳师范学院

信阳师范学院学报(自然科学版)

CSTPCD
影响因子：0.446
ISSN：1003-0972
年,卷(期)：2024.37(3)
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