Higher improvement in soil health by animal-sourced than plant-sourced organic materials through optimized substitution
Higher improvement in soil health by animal-sourced than plant-sourced organic materials through optimized substitution
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DOI：
10.1016/j.agee.2023.108875
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发表时间：
2024-04
期刊：
影响因子：
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通讯作者：
Chang Shi;Qingwen Zhang;Bowei Yu
中科院分区：
文献类型：
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作者：
Chang Shi;Qingwen Zhang;Bowei Yu
有机物料的投入可以改善土壤健康，减轻对环境的不利影响;然而，由于缺乏农业来源的不同有机物料对土壤健康影响的定量信息，有机物料投入对土壤健康的促进作用存在争议。本研究提出了一种新的土壤健康评价方法，使用树结构机器学习算法定量评估动物源（AS）和植物源有机材料（PS）对土壤健康的影响。结果表明，随机森林回归因子（RFR）和光梯度增强机回归因子（LightGBMR）两个集成模型在测试集中的决定系数（R2）分别为0.879和0.877，相对百分偏差（RPD）分别为2.83和2.84（P<0.0 0 1）。我们的研究结果表明，与PS相比，AS的应用导致水稻、小麦和玉米土壤健康的上级改善。与化肥（CF）相比，AS使水稻、小麦和玉米的土壤健康指数（SHIs）提高了23.8- 39.8%，PS使水稻、小麦和玉米的土壤健康指数提高了13.4- 24.4%，AS+ PS使水稻、小麦和玉米的土壤健康指数提高了16.0-35.4%（P< 0.001）。此外，AS对SHIs的正效应大于PS。水稻、小麦和玉米的SHI与PS相比，AS提高了7.34-14.9%（P< 0.001）。水稻、小麦和玉米的合理施氮量分别为262-290、235-259和299-331 kg ha− 1/a − 1。基于对土壤健康的正反馈效应，水稻、小麦和玉米的合理替代率分别为26.4- 29.2%、27.0- 29.8%和29.6- 32.8%。这项研究证实，有机材料通过优化替代改善土壤健康，从而有助于可持续农业管理和减少对环境的不利影响。
Organic material input can improve soil health and mitigate adverse environmental consequences; however, there is controversy regarding the promoting effects of organic material inputs on soil health due to a lack of quantitative information on the effects of different organic materials from agricultural sources on soil health. This study proposed a novel soil health evaluation method using tree-structured machine learning algorithms to quantitatively assess the effects of animal-sourced (AS) and plant-sourced organic materials (PS) on soil health. The results demonstrated that in the testing set, the two ensemble models, random forest regressor (RFR) and light gradient boosting machine regressor (LightGBMR), showed high coefficient of determination (R 2) of 0.879 and 0.877, respectively, and relative percent deviation (RPD) of 2.83 and 2.84, respectively (P< 0.001). Our findings indicated that the application of AS resulted in superior improvement of soil health for rice, wheat, and maize in comparison to PS. Compared with chemical fertilizer (CF), AS improved soil health indices (SHIs) for rice, wheat, and maize by 23.8–39.8%, PS improved SHIs for rice, wheat, and maize by 13.4–24.4%, and AS+ PS improved SHIs for rice, wheat, and maize by 16.0–35.4%(P< 0.001). In addition, the positive effect of AS on SHIs was greater than that of PS. Compared with PS, the SHIs for rice, wheat, and maize increased by 7.34–14.9% for AS (P< 0.001). The reasonable nitrogen (N) application rates for rice, wheat, and maize were 262–290, 235–259, and 299–331 kg ha− 1 year− 1, respectively. Based on the positive feedback effects on soil health, the reasonable AS substitution rates for rice, wheat, and maize were 26.4–29.2%, 27.0–29.8%, and 29.6–32.8%, respectively. This study confirmed that organic materials improve soil health through optimized substitution, thus contributing to sustainable agricultural management and reducing adverse environmental impacts.