酸雨对菜园土总氮淋失影响的研究  

Effects of Simulated Acid Rain on Nitrogen Leaching in Vegetable Garden Soils with Application of Compound Fertilizer

作　　者：麦志宏 Mai Zhihong(Ecological Environmental Protection and Water Integrated Service Center,Yongning Street,Zengcheng District,Guangzhou 510000,China)

机构地区：[1]广州市增城区永宁街生态环境保护和水务综合服务中心,广东广州510000

出　　处：《广东化工》2023年第19期136-138,共3页Guangdong Chemical Industry

摘　　要：为了解酸雨对菜园土中总氮淋失的影响,通过土柱模拟淋洗试验,对使用等量复合肥条件下,不同酸度模拟酸雨对菜园土总氮淋失特征进行了试验研究。结果表明,各模拟酸雨对菜园土中总氮淋失总量占肥料氮的46.06%~53.13%。模拟酸雨pH值在2.0~5.0范围内,pH值降低,总氮淋失量增大,pH为2.0模拟酸雨处理的总氮淋失量最大,达956.41 mg,pH为5.0的模拟酸雨处理总氮淋失量最低,为829.37 mg。试验结果还表明,不同pH值的模拟酸雨处理下淋滤液总氮浓度均随淋溶次数的增加呈不断下降趋势,淋滤液总氮浓度最大值为923.52 mg/L(pH 2.0,第1次淋滤液),最小值为94.56 mg/L(pH 5.0,第8次淋滤液)。不同酸度模拟酸雨处理下对菜园土的淋滤液累计淋失总氮量随淋溶次数的增加而增加,至第8次淋溶,各处理的累计淋失总氮量达到最大值。A soil column method was applied to study influences of simulated acid rain on leaching loss of total nitrogen from compound fertilizer in vegetable soil.Results showed that leaching loss amounts of total nitrogen were always large,occupied 46.06%to 53.13%in nitrogen of compound fertilizer under different treatments.Leaching loss amounts of TN increased with decrease of pH value of the simulated acid rain.The largest leaching loss amount of total nitrogen was 956.41 mg(pH=2.0),and the smallest was 829.37 mg(pH=5.0).Results also indicated that the concentration of total nitrogen decreased with leaching times increased.The max concentration of TN in leachate was 923.52 mg/L(pH=2.0 at first leaching).Strong acid rain enhanced nitrogen leaching while the acid rain with acidity slighter to the soil(pH=5.0)caused slightest nitrogen leaching loss.With increase of leaching times,concentration of total nitrogen in leachate decreased.The accumulative leaching loss amounts of total nitrogen was similar among all the different pH value of simulated acid rain.

关 键 词：菜园土 模拟酸雨 总氮 淋失 

分 类 号：TQ[化学工程]