黄豆生长对黄土高原缓坡坡耕地坡面侵蚀季节变化的影响

IF 3.6 2区农林科学 Q2 ENVIRONMENTAL SCIENCES

Land Degradation & Development Pub Date : 2025-05-01 DOI:10.1002/ldr.5611

Chong Yao, Songzhu Ye, Siyuan Chen, Mingjun Zhang, Ming Zhu, Faqi Wu

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引用次数: 0

摘要

随着作物生长，近土壤表面性状的变化可以强烈影响降雨期间的侵蚀过程，并为农田管理提供有价值的见解。本研究探讨了作物生长诱导的近土壤表面性状变化对缓坡农田土壤侵蚀的影响。在5 m × 1.4 m、坡度为5.24%和8.75%的粘土壤土径流地块上进行了降雨强度为80 mm h−1的降雨模拟试验，试验时间为大豆生长的5个阶段（G1‐播种、G2‐拔节、G3‐开花、G4‐籽粒形成和G5‐成熟）。测量了近土壤表面特征，并收集和测量了径流和沉积物样品。结果表明，近地表性状的变化具有时间依赖性，表现为弱至强的时间变化。总体而言，测量的径流和泥沙率在生长季节随作物生长先减小后增大。与裸地相比，平均径流量、产沙率和含沙量分别降低8% ~ 75%、13% ~ 92%和5% ~ 73%。径流速率、产沙速率、总径流量和总产沙量的季节变化与作物生长相关的近地表性状变化密切相关。径流量与近地表性状之间存在线性或指数函数关系。该研究反映了作物生长对减少土壤侵蚀的积极影响，为坡耕地水土保持提供理论指导。

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The Effect of Soybean Growth on the Seasonal Variation of Hillslopes Erosion in Gently Sloping Farmland on the Loess Plateau

Changes in near soil‐surface traits with crop growth can strongly influence erosion processes during rainfall events and provide valuable insights for farmland management. This study explored how crop growth‐induced variations in near soil‐surface traits affect soil erosion on gently sloping farmlands. A rainfall simulation experiment with a rainfall intensity of 80 mm h−1 was carried out in runoff plots (5 m × 1.4 m) filled with clay loam with slope gradients of 5.24% and 8.75% at five soybean growth stages (G1‐seeding, G2‐jointing, G3‐final flowering, G4‐grain forming, and G5‐ripening). Near soil‐surface traits were measured, and runoff and sediment samples were collected and measured. The results indicated that the variation in near soil‐surface traits was time‐dependent and showed weak to strong temporal variations. Overall, the measured runoff and sediment rates showed temporal variations, first decreasing and then increasing with crop growth during the growing season. The mean runoff rate, sediment rate, and sediment concentration decreased by 8%–75%, 13%–92%, and 5%–73%, respectively, in comparison with the bare soil. Seasonal variations in the runoff rate, sediment rate, total runoff volume, and total sediment yield were closely related to changes in near soil‐surface traits related to crop growth. Linear or exponential functional relationships were found between the runoff volume and near soil‐surface traits. This study reflects the positive impact of crop growth on reducing soil erosion and provides theoretical guidance for soil and water conservation in sloping farmlands.

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来源期刊

Land Degradation & Development 农林科学-环境科学

CiteScore

7.70

自引率

8.50%

发文量

379

审稿时长

5.5 months

期刊介绍： Land Degradation & Development is an international journal which seeks to promote rational study of the recognition, monitoring, control and rehabilitation of degradation in terrestrial environments. The journal focuses on: - what land degradation is; - what causes land degradation; - the impacts of land degradation - the scale of land degradation; - the history, current status or future trends of land degradation; - avoidance, mitigation and control of land degradation; - remedial actions to rehabilitate or restore degraded land; - sustainable land management.