不同pH条件下生物炭对不同土壤磷素淋失累积量的影响  

Eff ects of Biochar on Phosphorus Leaching Accumulation in Diff erent Soils Under Diff erent pH Conditions

作　　者：邱宇辉 高良敏[1] 张振 赵兴兰 张海强 慕明 Qiu Yuhui;Gao Liangmin;Zhang Zhen;Zhao Xinglan;Zhang Haiqiang;Mu Ming(School of Earth and Environment,Anhui University of Science and Technology,Anhui,232001)

机构地区：[1]安徽理工大学地球与环境学院,安徽232001

出　　处：《当代化工研究》2022年第16期1-3,共3页Modern Chemical Research

基　　金：安徽省重点研究与开发计划项目(生态环境专项)“淮河流域王蚌区间农业面源污染评估与控制关键技术研究”(项目编号:202004i07020012)。

摘　　要：生物炭作为土壤改良剂受到广泛的关注,为了探究生物炭在pH=5和pH=7的条件下对不同土壤磷素的影响。因此,采集S1、S2、S3三种不同的土壤,采用室内土柱模拟的方法,研究土壤淋溶液中总磷(TP)、溶解性总磷(DTP)和溶解性活性磷(SRP)的淋失累积质量浓度及其动态变化。结果表明:在不同pH条件下对不同土壤中TP、DTP、SRP的影响程度是不同的,模拟降雨pH=5淋溶得到的溶液的TP、DTP、SRP质量浓度比模拟降雨pH=7淋溶得到的溶液的高,这说明酸雨会破坏土壤,导致土壤中更多的磷元素流失。添加生物炭的BC组的TP、DTP、SRP淋失累积质量浓度均比CK组的低,采用生物炭混入土壤中能够抑制土壤中磷元素的淋失,增强土壤保肥能力。Biochar has attracted extensive attention as a soil modifier.In order to explore the effects of biochar on different soil phosphorus at pH=5 and pH=7.Therefore,soil samples S1,S2 and S3 were collected to study the cumulative concentration of dissolved total phosphorus(TP)and dissolved active phosphorus(SRP)in soil leaching solution and their dynamic changes by indoor soil column simulation.The results showed that different pH conditions had different effects on TP、DTP、SRP in different soils.The TP、DTP、SRP concentration of the solution leached by simulated rainfall pH=5 was higher than that of the solution leached by simulated rainfall pH=7,indicating that acid rain would damage soil and lead to more phosphorus loss in soil.The cumulative concentration of TP、DTP and SRP leaching in BC group was lower than in CK group.The application of biochar in soil can inhibit the leaching of phosphorus in soil and enhance soil fertility retention.

关 键 词：pH 生物炭 淋失累积 土壤磷 土柱 

分 类 号：X52[环境科学与工程—环境工程]