生物质炭对稻田土壤有机碳组分的持效影响  

Persistent Effects of Biochar Application on Organic Carbon Fractions of Paddy Soil

作　　者：付琳琳[1] 蔺海红 李恋卿[1] 郑金伟[1] 郑聚锋[1] 张旭辉[1] 俞欣妍[1] 王家芳[1] 潘根兴[1] 

机构地区：[1]南京农业大学农业资源与生态环境研究所,江苏南京210095

出　　处：《土壤通报》2013年第6期1379-1384,共6页Chinese Journal of Soil Science

基　　金：公益性行业(农业)科研专项经费项目(200903003)资助

摘　　要：生物质炭的应用已经被认为是以碳封存形式减轻气候变化的有效手段。本研究以一次性施用生物质炭3年后水稻土为对象，分析土壤总有机碳（TOC）、可溶性有机碳（DOC）、颗粒态有机碳（POC）、易氧化态有机碳（ROC）和微生物量碳（MBC）含量的变化，研究施用生物质炭对土壤有机碳和组分的后续影响。结果表明，在10thm-2,20thmt和40thm。的生物质炭施用水平下，显著提高土壤有机碳储量，增幅达9．15—15．49％。施用生物质炭可长期稳定提高土壤TOC、ROC、POC和MBC分别达12．75％～23．36％、12．60％～28．00％、10．88％～34．00％和7．97％～12．35％，且土壤TOC与ROC、MBC极显著正相关，ROC与POC、MBC也存在极显著正相关，这可能与生物质炭可改善土壤结构、促进作物生长有关。因此，施用生物质炭是长期提高水稻土土壤碳储量和活性有机碳含量的有效措施。。Biochar （BC） application has bee n suggested as an effective means of abating climate change by sequestering carbon. In this study,a 3-year field experiment was conducted to investigate the effect of biochar on soil organic carbon （SOC） cycling. BC was applied as a basal soil amendment in 2009 at the rates of 0, 10, 20 and 40 t hm-2, and soil total organic carbon （TOC）, dissolved organic carbon （DOC）, readily oxidizable organic carbon（ROC）, particulate organic carbon （POC） and microbial biomass carbon （MBC）were monitored in 2012. BC applications significantly increased SOC storage by 9.15 - 15.49%, and TOC, ROC, POC and MBC were also increased by 12.75 23.36%, 12.60 - 28.00%, 10.88 N 34.00%,7.97 - 12.35% by BC application, respectively. The results suggested biochar-sourced organic carbon could be steadily maintained in soils for long run （3 years at least）. TOC was very significantly correlated with ROC and MBC, while there was a very significantly correlated between ROC and POC, MBC, which were related to the capabilities of BC to improve soil structure and promote crop growth. Thus, BC application is a continuous effective measure to improve organic carbon storage and the contents of soil active organic carbon of paddy soil.

关 键 词：生物质炭 有机碳 活性有机碳 水稻土 

分 类 号：S147.2[农业科学—肥料学]