生物炭添加对皖南旱地土壤物理性质及水分特征的影响

发布时间：2018-04-11 01:17

本文选题：生物炭 + 土壤容重与孔隙度　；参考：《土壤通报》2016年02期

【摘要】：为明确生物炭添加对皖南旱地典型土壤供水能力的影响,采用室内模拟实验,研究了3种生物炭(竹炭、稻炭和烟炭)及3种添加比例(2%,5%,10%)对皖南旱地土壤物理性质及水分特征的影响。结果显示:土壤容重随生物炭添加量的增加而减小,土壤总孔隙度、毛管孔隙度、吸湿系数、凋萎湿度、饱和持水量及田间持水量随生物炭的添加而呈增加的趋势,竹炭2%、5%和10%添加处理及稻炭与烟炭5%和10%添加处理在降低土壤容重、增加孔隙度、吸湿系数、凋萎湿度、饱和持水量和田间持水量较对照有差异显著(P0.05)。随着生物炭添加量的增加,土壤有效水分范围进一步增大,速效水与中效水含量增加,提高了土壤对作物的供水能力;同时,生物炭在一定程度上减少了水分蒸发,提高了土壤的保水保湿能力。因此,合理施用生物炭对改善土壤供水能力有着重要作用,在我国南方红壤旱地中有很强的适用性。
[Abstract]:In order to clarify the effect of biochar addition on the water supply capacity of typical soils in southern Anhui, three kinds of biochar (bamboo charcoal) were studied by laboratory simulation experiments.The effects of rice charcoal and tobacco charcoal) and three kinds of additive ratio of 2% and 10% on the physical properties and water characteristics of dry land soil in southern Anhui Province.The results showed that the soil bulk density decreased with the increase of biochar addition, and the soil total porosity, capillary porosity, moisture absorption coefficient, wilting humidity, saturated water holding capacity and field water holding capacity increased with the addition of biochar.The treatments of 5% and 10% of bamboo charcoal and 5% and 10% of rice charcoal and tobacco charcoal had significant differences in reducing soil bulk density, increasing porosity, moisture absorption coefficient, wilting humidity, saturated water holding capacity and field water holding capacity compared with the control.With the increase of the amount of biochar, the range of soil available water increased, the content of available water and medium effective water increased, the ability of soil water supply to crops was improved, and the evaporation of water was reduced to a certain extent by biochar.The water and moisture retention ability of the soil is improved.Therefore, the reasonable application of biochar plays an important role in improving soil water supply capacity, and has a strong applicability in the red soil upland of southern China.
【作者单位】：中国科学院南京土壤研究所土壤与农业可持续利用国家重点实验室;上海烟草集团责任有限公司;
【基金】：沪皖现代烟草农业高科技示范园科技项目专项(CF56.1-ZJ1)资助
【分类号】：S152

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