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Partial Organic Substitution Improves Soil Quality and Increases Latex Yield in Rubber Plantations

文献类型： 外文期刊

作者： Xu, Wenxian 1 ; Liu, Wenjie 3 ; Zhao, Congju 4 ; Zhang, Yingying 1 ; Tahir, Ashar 1 ; Guo, Xinwei 1 ; Sun, Rui 1 ; Yang, Qiu 3 ; Wu, Zhixiang 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou 571101, Peoples R China

2.Hainan Danzhou Trop Agroecosyst Natl Observat & Re, Danzhou 571737, Peoples R China

3.Hainan Univ, Ctr Ecoenvironm Restorat Hainan Prov, Sch Ecol, Haikou 570228, Peoples R China

4.Hainan Normal Univ, Sch Geog & Environm Sci, Haikou 571158, Peoples R China

关键词： leaf nutrients; soil enzyme activity; soil fertility; rubber plantation

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 8 期

页码：

收录情况： SCI

摘要： Partial organic substitution (POS) is a promising strategy to enhance soil fertility and agricultural sustainability. However, the mechanisms by which varying organic substitution ratios affect soil quality and latex yields in rubber plantations remain unclear. We conducted a two-year field experiment in a rubber plantation with six treatments: no fertilizer (CK), 100% synthetic fertilizer (NPK), and synthetic nitrogen fertilizer substituted with 25% (25 M), 50% (50 M), 75% (75 M), and 100% (100 M) manure. The results indicated that POS treatments significantly increased pH, soil organic carbon (SOC), total phosphorus (TP), total nitrogen (TN), NH4+-N, enzyme activity, and leaf nutrient (C, N, and P) content compared to NPK. Compared with NPK, the soil quality (evaluated through the soil quality index, SQI) increased by 15.30-43.42% under POS across both years, with maximal values observed at 50 M (2020) and 75 M (2021); similarly, the latex yield increased by 2.10-18.60%. SOC, NO3--N,C:P ratio, TN, and pH are the key factors that influence soil quality and latex yield. Structural equation modeling indicated that fertilization and soil factors collectively explained 82% of the variation in latex yield. These results demonstrated that POS effectively alleviated soil acidity, enhanced soil quality, and improved latex productivity, with 50% manure substitution treatment (50M) identified as the optimal short-term substitution strategy in rubber plantations.

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