生物炭对土壤水分蒸发的影响

发布时间：2018-05-02 16:32

本文选题：生物炭 + 粒径　；参考：《应用生态学报》2016年11期

【摘要】：为确定干旱区生物炭的合理施用量及其对土壤水文过程的影响,采用室内土柱试验,研究了3种生物炭添加量(5%、10%和15%)和4种生物炭类型(d0.25 mm竹炭、0.25 mmd1 mm竹炭、d0.25 mm木炭和0.25 mmd1 mm木炭;d为粒径)对地下水补给、土壤持水能力、土壤水分上升运动和蒸发的影响.结果表明:生物炭对地下水补给、土壤持水能力、土壤水分上升运动和蒸发都有明显影响,但生物炭原料和粒径不同,其影响效果不同;随生物炭施加量的升高,地下水对土壤补给量增大;添加生物炭可提高土壤持水能力,促进土壤水含量的上升速度,其中,添加竹炭效果大于木炭,小粒径生物炭大于大粒径生物炭;生物炭添加量较低(5%)时能有效抑制土壤蒸发,但添加量过高则可能促进土壤蒸发.干旱地区土壤适当施用生物炭可提高土壤保墒能力.
[Abstract]:In order to determine the reasonable application rate of biochar and its influence on soil hydrological process in arid area, laboratory soil column test was carried out. The effects of 10% and 15% biochar (10% and 15%) and 4 types of biochar (D0. 25 mm bamboo charcoal, 0. 25 mmd1 charcoal / d) on groundwater recharge, soil water holding capacity, soil moisture movement and evaporation were studied. The results showed that biochar had a significant effect on groundwater recharge, soil water holding capacity, soil moisture movement and evaporation, but the effect of biochar was different with the increase of the amount of biochar. The increase of groundwater supply to soil, the increase of soil water holding capacity and the increase rate of soil water content by adding biochar, in which the effect of adding bamboo charcoal is greater than that of charcoal, and that of small size biochar is larger than that of large diameter biochar. The addition of biochar can effectively inhibit soil evaporation, but excessive addition may promote soil evaporation. The ability of soil moisture conservation can be improved by proper application of biochar in arid areas.
【作者单位】：西北农林科技大学水土保持研究所;中国科学院水利部水土保持研究所;西北农林科技大学水利与建筑工程学院;
【基金】：国家高新技术研究发展计划项目(2011AA100507)资助~~
【分类号】：S152.7

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