浙江农林大学学报2018，Vol.35Issue(3)：387-397,11.DOI:10.11833/j.issn.2095-0756.2018.03.001
酸化猪炭对土壤中不同形态磷质量分数及相互转化的影响
Concentration and fractionation of phosphorous in soils with acidulated pig biochar
摘要
Abstract
To determine the effect of addition of acidulated pig bio char on phosphorus (P) availability and fractionation in soils, an incubation experiment was carried out using a randomized complete block design hav-ing five treatments: an untreated control (ck), acidulated pig biochar, raw pig biochar, single superphosphate, and calcium magnesium phosphate, with three replications. Each amendment was mixed with soil at 0.1％ (w/w) and placed in a plastic pot. Soil samples were taken from each pot after a 210-day incubation period to as-sess P fractionation using modified Hedley's sequential extraction procedures. A correlation analysis was also included. Results showed that, compared to ck, electrical conductivity (EC) of the soil increased (P<0.05)with raw pig biochar (24％) and acidulated pig biochar treatments (14％), but there was no significant effect on soil pH. Compared to ck, with the same application rate acidulated biochar was more effective (P<0.05) than pig biochar for improving the proportions of soil labile and moderately labile phosphorus; whereas, no sig-nificant differences in these P proportions between the acidulated biochar and the fertilizer treatments were found. Compared to ck, the percentage of labile P pools significantly (P<0.05) increased in all treatments, but there were no significant differences between biochar and fertilizer treatments. In comparison with ck, moder-ately labile P pools increased (P<0.05) in biochar (36.2％) and fertilizer treatments (77.2％) in the following order: acidulated pig biochar > superphosphate > calcium magnesium phosphate > raw pig biochar. The percentage of stable P pools decreased (P<0.05) with addition of the amendments, and the proportion of the stable P pools was negatively correlated to the proportion of labile (R2=0.86, P<0.01) and moderately labile (R2=0.94, P<0.01) P pools. The acidulated pig biochar treatment significantly (P<0.05) increased the con-centration of all P fractions and maintained a relatively low proportion of stable P in the treated soil. In conclu-sion, with significant differences in soil P concentrations and fractionations between acidulated pig biochar and chemical P fertilizers treatments tested, it would be potentially viable to use acidulated pig biochar as an alter-native P fertilizer and substitute for superphosphate and calcium magnesium phosphate in agricultural produc-tion.关键词
土壤学/酸化/猪炭/土壤/磷/形态转化Key words
soil science/acidulate/pig biochar/soil/phosphorus/fraction and transformation分类
农业科技引用本文复制引用
王秋月,杨兴,何丽芝,陆扣萍,车磊,袁国栋,王海龙..酸化猪炭对土壤中不同形态磷质量分数及相互转化的影响[J].浙江农林大学学报,2018,35(3):387-397,11.基金项目
国家自然科学基金资助项目(21577131,41401338) （21577131,41401338）
浙江省重大科技专项(2015C03019) （2015C03019）
东莞市引进创新科研团队项目(2014607101003) （2014607101003）
