Can intercrops improve soil water infiltrability and preferential flow in rubber-based agroforestry system?
Can intercrops improve soil water infiltrability and preferential flow in rubber-based agroforestry system?
复制标题
间作能否改善橡胶农林系统土壤水的渗透性和优先流动？
DOI：
10.1016/j.still.2019.04.017
复制
发表时间：
2019
影响因子：
6.5
通讯作者：
Jiang xiaojin
中科院分区：
文献类型：
--
作者：
Zhu xiai;Chen chunfeng;Wu junen;Yang jianbo;Zhang wanjun;Zou xin;Liu wenjie;Jiang xiaojin
由于广泛采用橡胶农林业而引起的土地使用变化影响到生态系统服务。然而，很少有人知道他们的土壤水文功能与渗透和水流行为，影响地表径流，土壤侵蚀和地下水补给。为了阐明橡胶-茶复合系统中间作是否能促进土壤水分入渗和水分运动，在西双版纳橡胶-茶复合系统原状土壤上进行了66个田间入渗试验和2个染料示踪试验。结果表明，田间饱和土壤导水率具有很强的空间异质性。茶树种植区的Ks、初始入渗速率（IIR）和实际稳态入渗速率（Is）均显著高于橡胶树种植区。随着离茶树树干距离的增加，橡胶树的Ks值逐渐减小，橡胶树行间的Ks值低于橡胶树行间的Ks值。trees.in沿着土壤物理性质的改善、根系和动物活动的增加、不均匀的裂缝和石块的增多，橡胶林土壤水分的入渗性和优先流比橡胶林高，因此，橡胶林复合系统中的茶树可以起到集水器的作用，有助于更深的排水和补给。相比之下，橡胶树消耗水分，导致土壤干燥和缺水。function.as胶-茶复合系统中不同区域土壤水力特性的差异，可导致地表水和地下水的空间再分配，增加不同根系植物的水分有效性。更好的渗透和茶树下优先流的增加可能减少径流产生和侵蚀风险，促进地下水补给，增加蓄水量，从而抵消间作和橡胶树的截留和蒸腾损失，从而有助于水资源管理。
Land-use change due to the widespread practice of rubber-based agroforestry influences ecosystem services..However, little is known about their soil hydrological functioning associated with infiltration and water flow.behaviour which affects surface runoff, soil erosion, and groundwater recharge. In order to clarify whether the.intercrop can promote soil water infiltrability and water movement in rubber-based agroforestry system, 66 field.infiltration and 2 dye tracer experiments were performed in this study on undisturbed soil in a rubber-tea.agroforestry system in Xishuangbanna, SW China. The results showed that the field saturated soil hydraulic.conductivity (Ks) exhibited a high spatial heterogeneity. The Ks, initial infiltration rate (IIR), and actual steadystate.infiltration rate (Is) were significantly higher in the tea tree planting zone (TT) than in the rubber tree.planting zone (RT). The Ks decreased with distance from the trunks of tea trees, and the Ks between rubber trees.in a row was lower than that between rubber rows. Along with improved soil physical properties, increased root.and faunal activities, and more inhomogeneous cracks and stones, there was higher soil water infiltrability and.more preferential flow in the TT than in the RT. Therefore, tea shrubs in rubber agroforestry systems may.function as water harvesters, contributing to deeper drainage and recharge. In contrast, the rubber trees function.as water consumers, causing soil desiccation and water scarcity. Differences in the soil hydraulic properties.among different zones in a rubber-tea agroforestry system can lead to the spatial redistribution of surface and.belowground water, increasing water availability for various plants with different root systems. Better infiltration.and increased preferential flow beneath tea trees potentially reduce runoff generation and erosion risk,.promote groundwater recharge, and increase water storage that may counteract the interception and transpiration.losses from intercrops and rubber trees, thereby contributing to the management of water resources.