[Response Characteristics of Farmland Soil Enzyme Activity and Microbial Nutrient Restriction Under Long-term Mulching Measures in the Loess Plateau].

• DOI: 10.13227/j.hjkx.202402067
• Publication Date: 2025-02-08
• Authors: Xu Wen; Jiaqi Hao; Tingyong Jiang; Guoxi Gao; Wenqiang Wu; Yongzhong Feng; Guangxin Ren; Xing Wang
• Keywords: Soil enzyme; Loess plateau; Soil nutrients

To study the response characteristics of long-term mulching measures on soil enzyme activity and limitation microbial nutrients in Loess Plateau Region, adopted a random block design setup based field positioning experiment conducted 2008. Four types inter-field management were established, including conventional no-mulch （NM）, straw mulch （SM）, （PM）, ridge （RPM）. The changes extracellular activities, their ecological stoichiometry influencing factors under different cover measures, investigated using one-way analysis variance, stoichiometric model enzymes, redundancy （RDA）. results showed that significantly affected basal （P <0.05） dissolubility organic carbon, available nitrogen （AN）, phosphorus （AP） significant dynamic with plant growth. C, N, P cycles positive increased or changed by 21.03%-161.14%, 1.11%-60.68%, 17.55%-37.66%, respectively, effect SM RPM being more significant. During tillage, microorganisms as whole faced C N nutrient limitations. Under treatment, vector angle 11.52%-23.17% early growth stage crops, indicating was alleviated, while overall length an increasing trend 10.38%-84.38%. Additionally, level restriction became stronger over time. RDA water content, AN, AP content key affecting measurement relationship Plateau. In summary, implementation tillage practices Region had impact properties activities could be combined to achieve better results. meantime, appropriate application fertilizer should considered mitigate research can help understand influence utilization strategies agricultural land its regulatory mechanisms. Moreover, it provides theoretical foundations for sustainable development hilly area.