生物质炭输入对盐化灰漠土壤水分运移的影响
发布时间：2018-05-19 21:00
本文选题：生物质炭 + 灰漠土盐化土壤 ； 参考：《新疆农业科学》2017年02期
【摘要】：【目的】研究生物质炭输入对氯化物—硫酸盐盐化灰漠土水分垂直运移的影响。【方法】轻、中、重盐渍化土壤输入不同量生物质炭,以不添加生物质炭为对照,通过滴加去离子水,观测湿润锋和累计入渗量随入渗时间的变化。【结果】各程度盐渍化土壤不同生物质炭输入量处理,湿润锋垂直运移距离和累计入渗量随入渗时间的持续均显著增大(P㩳0.05);生物质炭输入阻碍水分在中、重度氯化物-硫酸盐盐化灰漠土入渗,低生物质炭输入量(≤4%)促进水分在轻度盐渍化土壤垂直运移;轻、中度盐化灰漠土输入大量(≥6%)生物质炭可增加累计入渗量,重度盐化土壤累计入渗量随生物质输入量增加而降低;不同生物质炭输入量处理间垂直湿润锋深度的累积入渗量变化无规律。【结论】生物质炭输入比例、盐渍化程度及两者的交互效应对土壤水分的入渗效率和累计入渗量均有显著影响:对中度盐渍化土壤入渗速率和入渗量促进作用突出;低量输入对轻度盐渍化土壤水分运移有促进作用;对重度盐渍化土壤累计入渗量和入渗速率均有抑制作用。
[Abstract]:[objective] to study the effect of carbon input on vertical water migration in chlorine-sulfate ash desert soil. [methods] different amounts of biomass carbon were imported into light, medium and heavy salinized soil, and the control was not added to biomass carbon. The changes of wetting front and accumulative infiltration amount with infiltration time were observed by adding deionized water. [results] the different biomass carbon input amount of different salinized soil was treated. The vertical migration distance and cumulative infiltration amount of wetting front increased significantly with the duration of infiltration, and biomass carbon input hindered the infiltration of heavy chlorine-sulfate ash desert soil. Low biomass carbon input (鈮，
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