生态环境学报2018，Vol.27Issue(2)：356-363,8.DOI:10.16258/j.cnki.1674-5906.2018.02.021
农业废弃物生物炭理化性质的差异及对菜心产量的影响
Physicochemical Properties of Biochars Originated from Different Agricultural Wastes and Their Impact on the Yield of Brassica campestris L.
摘要
Abstract
To explore the physicochemical properties of biochars of different origins and their impact on crop growth, biochars made from eight kinds of typical agricultural wastes of Guangdong Province were analyzed and tested in a pot experiment using Brassica campestris.Results showed that biochars of different origins displayed significant physicochemical differences,including the content of available K, Na, Ca, Mg, etc. Available K content was the main impact factor of different biochars. When available K content of biochars ranged from 0.66~7.47 g·kg-1, the application of 60 g·kg-1biochar increased the soil pH from 4.77 to 5.26~6.15, and stimulated the growth of B.campestris by 112%~168%.When available K content was more than 18.0 g.kg-1,the biochar application increased the soil pH above 7.2,but had no or even negative effect on the yield of B.campestris.Factor analysis showed that four factors could be drawn from the physicochemical parameters of biochars, and the factor 3 that mainly represented available K, available phosphorous,dissolved organic carbon(DOC),C and Cr was the main factor affecting the yield of B.campestris.Cluster analysis showed that the eight kinds of biochars could be divided into two groups: (I) biochars made from bagasse, peanut shell and rice husk, and (II) biochars made from water hyacinth, rice straw, luffa, corn straw and peanut straw. These results indicate that available K content is the key factor for the application of biochar to remediate acidic vegetable soils and increase crop growth. This study can also guide the use of agricultural wastes in Guangdong Province.关键词
生物炭/理化性质/聚类分析/菜心Key words
biochar/physical and chemical properties/cluster analysis/Brassica campestris分类
农业科技引用本文复制引用
黄永东,杜应琼,陈永坚,管颐雯,李蕾,徐爱平,邓腾灏博,柳勇..农业废弃物生物炭理化性质的差异及对菜心产量的影响[J].生态环境学报,2018,27(2):356-363,8.基金项目
广东省自然科学基金(2014A030313570) （2014A030313570）
广东省科技计划项目(2014A020208067 （）
2015A020208009 （）
2014B020206001) （）
广东省农业面源污染防控与产地环境安全共性技术创新团队(2017LM2149) （2017LM2149）
广东省农业科学院院长基金项目(201802) （201802）
