生态学杂志2017，Vol.36Issue(10)：2903-2909,7.DOI:10.13292/j.1000-4890.201710.027
连续施用炭基肥及生物炭对棕壤有机氮组分的影响
Effects of continuous application of biochar-based fertilizer and biochar on organic nitrogen fractions in brown soil
摘要
Abstract
To clarify the change of organic nitrogen fractions with continuous fertilization,a sitespecific plot experiment was used to study the effects of continuous application of biochar-based fertilizer and biochar on the fractions of organic nitrogen in brown soil.Five treatments were employed,including the control without fertilization (CK);low application level of biochar;high application level of biochar;nitrogen,phosphorus and potassium combined fertilization;and biochar-based fertilizer.Soil samples were collected in 0-20 and 20-40 cm soil layers after the harvest of peanut in 2014.An organic N fractionation method by Brenmer was used to determine soil organic nitrogen fractions.The results showed that after 4 consecutive years of fertilization treatments,total soil nitrogen increased for all the treatments.The total soil nitrogen of biochar-based fertilizer treatment was significantly higher than that in the original soil and CK group,with increases of 69.8％ and 4.8％ respectively.The contents of soil organic nitrogen fractions in different fertilization treatments were in the order of ammonium N ＞ amino acid N ＞ non-hydrolysable N ＞ hydrolysable unidentified N ＞ amino sugar N.The input of biochar-based fertilizer significantly increased the contents of ammonium N and amino acid N in acid hydrolysable organic nitrogen of soil.Compared with the original soil,the input of biochar-based fertilizer increased the contents of ammonium N and amino acid N by 65.9％ and 128.0％ respectively.As the application rate of biochar increased,ammonium N content showed an increasing trend,but such increment in the biochar treatments was far lower than that in the biochar-based fertilizer treatment.The applications of biochar,NPK fertilizers and biochar-based fertilizer increased the content of hydrolysable unidentified N,and the total content of non-hydrolysable organic nitrogen,but the differences among the treatments were not significant.Overall,continuous application of biocharbased fertilizer or biochar significantly increased the contents of ammonium N and amino acid N from acid hydrolysable organic nitrogen in soil,promoted the activation of nitrogen,and benefited the uptake and transport of nitrogen of low-and middle-yield peanut field.关键词
炭基肥/生物炭/棕壤/有机氮组分Key words
biochar-based fertilizer/biochar/brown soil/organic nitrogen fraction引用本文复制引用
李玥,余亚琳,张欣,杨青城,曾宇晴,韩晓日,杨劲峰..连续施用炭基肥及生物炭对棕壤有机氮组分的影响[J].生态学杂志,2017,36(10):2903-2909,7.基金项目
国家自然科学基金项目(41371287)、国家现代农业产业技术体系建设专项(CARS-14)和公益性行业专项(201203030-04-03)资助. （41371287）
