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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Rice husk biochar influences runoff features, soil loss, and hydrological behavior of a loamy soil in a series of successive simulated rainfall events
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Rice husk biochar influences runoff features, soil loss, and hydrological behavior of a loamy soil in a series of successive simulated rainfall events

机译：稻壳Biochar在一系列连续模拟的降雨事件中影响遗漏土壤的径流特征，土壤损失和水文行为

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摘要

As biochar affects soil hydrological processes, a detailed laboratory experiment was run to investigate the effect of three biochar application rates of 1, 2, and 3 kg m(-2) under three successive simulated rainfall events (three rounds) with about 10-day intervals on runoff rate, soil loss, salinity of runoff and percolated water of a loamy soil. Rice husk biochar produced in 600 degrees C for four hours was mixed in the top 0-1.5 cm of the soil surface. A simulated rainfall intensity of 28 mm h(-1) was applied for 60 min over the soil bins measuring 1.4 m x 1.4 m x 0.1 m. Results showed that the 3 kg m(-2) application of biochar prevented runoff generation, and consequently there was no soil loss. The 2 kg m(-2) application of biochar significantly reduced runoff rate, runoff coefficient, and soil loss compared to the 1 kg m(-2) and the control (no biochar application). In addition, the 2 kg m(-2) application of biochar significantly increased the time to runoff generation, which clearly implies an appropriate amount of biochar could control runoff rate and soil loss. The rainfall rounds had significant effects on the time to runoff generation, total soil loss, and the peak of runoff salinity. A combined analysis showed that a power function can be satisfactorily fit to the runoff and soil loss rates. In terms of environmental concerns of biochar application, results revealed that rice husk biochar might not be an environmental threat and the salinity of runoff and percolated water were lower than 1 dS m(-1). In conclusion, this study showed that rice husk biochar at certain amounts could be used to reduce or prevent runoff and soil loss in loamy soil in a semi-region area.
机译：随着生物炭影响土壤水文过程，运行详细的实验室实验，以研究三个连续的模拟降雨事件（三轮）下的三个生物炭申请率为1,2和3kg M（-2）的效果径流率，土壤损失，径流盐度和溶解水的间隔。在600℃下生产的稻壳生物炭4小时在土壤表面0-1.5厘米的顶部0-1.5厘米。将模拟的降雨强度为28mm H（-1），在土壤箱上施加60分钟，测量1.4米×1.4m×0.1米。结果表明，Biochar的3 kg m（-2）施加径流产生，因此没有土壤损失。与1 kg m（-2）和控制（无生物炭应用）相比，Biochar的2kg m（-2）施加径流率，径流系数和土壤损失显着降低。此外，BioChar的2kg M（-2）施加显着增加了径流产生的时间，这清楚地意味着适当的Biochar可以控制径流率和土壤损失。降雨轮对径流产生，总土壤损失和径流盐度的峰值产生了显着影响。组合分析表明，功率函数可以令人满意地适应径流和土壤损失率。就生物炭申请的环境问题而言，结果显示，稻壳生物炭可能不是环境威胁，径流和渗透水的盐度低于1ds m（-1）。总之，这项研究表明，各种量的稻壳生物炭可用于减少或预防半区区域中壤土的径流和土壤损失。

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