Shuitu Baochi Xuebao, 2011 通过室内土柱模拟试验,设置活性炭质量分数为0%(对照),0.1%,0.3%,0.6%,0.9%及1.2%共6个处理,研究不同活性炭施入量对土壤入渗、蒸发特性及养分淋溶损失的影响。结果显示:随着活性炭用量的增加,土壤入渗能力先增强后减弱;100min时,施加0.3%活性炭的土壤累积入渗量达到最大,高于对照的10.60%,而施加1.2%活性炭的土壤累积入渗量较对照的减少5.70%;33d的土壤累积蒸发量随着活性炭施用量的增大而逐渐减小,与对照的相比最大减小量达21.35%;土壤淋溶液中硝态氮(NO3 ...
方圆, 冯浩, 操信春, 丁奠元
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Shuitu Baochi Xuebao, 2011 采用室内人工降雨模拟试验的方法,对不同土壤前期含水量的棕壤坡耕地养分流失特征进行了实验研究.研究结果表明:土壤前期含水量低于20%时,土壤硝态氮主要是以淋溶的形式流失;高于这一含水量时,土壤硝态氮流失途径除了淋失外,还存在径流流失现象.径流中磷离子和钾离子浓度随着降雨时间的增加逐渐减少,流失量与前期含水量不呈线性关系,而是呈近似抛物线关系,在前期含水量为10%～15%之间存在拐点.通过坡面物质流失量(NO3--N、SEP、DP、K+和产沙量)与前期土壤含水量的二次多项式关系,得到最优前期含水量值为11 ...
赵野 +4 more
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