Method for detecting and analyzing field decomposition rate of leguminous sand-fixing shrub litters

By using a systematic grid method to screen sample areas and measure the net increase in soil nitrogen in the detection of decomposition rate of litter from leguminous sand-fixing shrubs, and dynamically adjusting the lateral diffusion boundary of nitrogen, the problems of inaccurate nitrogen flux estimation and insufficient spatial heterogeneity in the existing technology were solved, and more accurate decomposition rate calculation was achieved.

CN121008029AActive Publication Date: 2025-11-25河套学院 +1
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Patent Information

Application Number
CN202511537509.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-27
Publication Date
2025-11-25
Estimated Expiration
2045-10-27

AI Technical Summary

Technical Problem

Existing technologies for detecting the field decomposition rate of litter from leguminous sand-fixing shrubs neglect the crucial process of litter releasing nutrients into the soil, leading to inaccurate nitrogen flux estimations and failing to dynamically adjust for spatial heterogeneity, resulting in errors in decomposition rate calculations.

Method used

The system grid method was used to screen sample areas. Soil nitrogen was measured at different distances using litter bags. The net increase in soil nitrogen was calculated, the lateral diffusion boundary of nitrogen was dynamically determined, and the litter decomposition rate was calculated in combination with nitrogen balance calibration.

Benefits of technology

This improved the ability of the decomposition kinetic model to reflect the actual nutrient cycle process, reduced the uncertainty in the calculation of the decomposition rate, and ensured the reliability and comparability of the experimental data.

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Abstract

The invention belongs to the technical field of ecology and environmental monitoring, and relates to a field decomposition rate detection and analysis method for leguminous sand-fixing shrub litters. The method comprises the following steps: screening a sample area through a system grid method, collecting and arranging litter bags, synchronously measuring initial and current nitrogen contents of soil, calculating a soil nitrogen net increment, determining a nitrogen transverse diffusion boundary, and further obtaining the nitrogen absorption amount of the soil; the equivalent dry matter loss amount is obtained based on nitrogen element balance calibration, and finally the litter decomposition rate is determined through exponential decay fitting. According to the method, the problem of decomposition rate estimation deviation caused by nitrogen migration and soil absorption in traditional detection is solved, the actual field decomposition process can be reflected more accurately, the reliability of monitoring data is improved, and reliable technical support is provided for desert ecosystem nutrient cycle research and ecological restoration effect evaluation.
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