Throughfall kinetic energy and its spatial characteristics under rubber-based agroforestry systems
Throughfall kinetic energy and its spatial characteristics under rubber-based agroforestry systems
复制标题
橡胶农林系统下的穿透动能及其空间特征
DOI：
10.1016/j.catena.2017.10.014
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发表时间：
2018-02
期刊：
影响因子：
6.2
通讯作者：
Zhu Kai
中科院分区：
文献类型：
--
作者：
Liu Jiaqing;Liu wenjie;Zhu Kai
橡胶通常作为单一作物种植，但最近尝试鼓励以橡胶为基础的农林系统，以减少对环境的不利影响，包括减少中国西南部西双版纳的土壤侵蚀。为评价不同类型橡胶复合农林系统对土壤侵蚀过程的影响，利用640个Tübingen溅杯测量了不同植被类型下的穿透雨动能。本研究以西双版纳热带植物园为研究对象，在自然降雨条件下进行。结果表明，无论是橡胶林复合系统还是橡胶单作系统，总干物质交换量与降雨量均呈显著的线性正相关。降雨量是导致该地区橡胶园土壤剥离的关键因素。橡胶种植园条件下的TKE明显高于露地条件（1.84 ~ 2.32倍）。而在多冠层单作条件下，差异不显著. compared.to不同胶基农林复合系统下的TKE值与冠层结构密切相关，TKE与叶面积指数呈显著负相关。橡胶农林复合系统中TKE的空间变异性高于橡胶单作系统。此外，TKE通常集中在3-4米的波段，没有亚冠层的保护。橡胶复合农林业的TKE仍然很高，这一事实erosion.by
Rubber is usually grown as a monoculture but there have been recent attempts to encourage rubber-based.agroforestry systems to reduce adverse environmental impacts, including the reduction of soil erosion in.Xishuangbanna, SW China. To estimate the influence of different types of rubber-based agroforestry systems on.soil erosion processes, we measured the throughfall kinetic energy (TKE) under different vegetation types by.using 640 sand-filled Tübingen splash cups. This study was conducted in Xishuangbanna Tropical Botanical.Gardens under natural rainfall conditions. Our results indicated that in both rubber-based agroforestry systems.and rubber monocultures, a significant linear positive correlation exists between TKE and rainfall amount..Rainfall amount is a critical factor that contributes to soil detachment in rubber plantations in this region. TKE.under rubber plantation conditions was found to be notably higher than under open field conditions (ranging.from 1.84 to 2.32 times greater). However, there was no significant difference under multiple canopies compared.to monoculture. TKE values under the different rubber-based agroforestry systems were closely related to.the canopy structure, and TKE and leaf area index were significantly negatively correlated. The spatial variability.of TKE was higher in rubber-based agroforestry systems than in rubber monocultures. In addition, TKE was.usually concentrated in 3–4 m bands that did not have the protection of a sub-canopy. The fact that the erosion.by TKE under rubber-based agroforestry was still high highlights the importance of selecting intercrops when.constructing rubber-based agroforestry systems and of improving planting patterns.
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影响因子：
5.2
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
T. Edition;R. P. C. Morgan;Msepr
影响因子：
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作者：
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通讯作者：
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