干旱地区农业研究2017，Vol.35Issue(1)：1-7,7.DOI:10.7606/j.issn.1000-7601.2017.01.01
不同耕作措施下陇中黄土高原旱作农田土壤活性有机碳组分及其与酶活性间的关系
The relationship between soil labile organic carbon fractions and the enzyme activities under different tillage measures in the Loess Plateau of central Gansu province
摘要
Abstract
Based on long-term conservation tillage experiments at Dingxi in the rain-fed field of western Loess Plateau in Gansu province,we investigated the effects of four types of tillage methods,including conventional tillage(T), no tillage no stubble retention (NT),no tillage with stubble retention(NTS)conventional tillage with stubble retention (TS),on soil organic carbon,soil labile organic carbon,soil microbial biomass carbon,carbon pool management and four kinds of soil enzymes involved in carbon cycling were invertase,diastase,cellulase and peroxidase .Aanalysis of the relationship between soil organic carbon and labile carbon fractions and soil enzymes showed that compared with T treat-ment NTS improved soil organic carbon,soil active organic carbon,soil microbial biomass carbon and carbon pool man-agement index,by 16 .3%,28 .26%,41 .88%,37 .04%,respectively .Compared with T,NTS,TS,NT improved the soil invertase,diastase,cellulase,peroxidase activities in 0~30 cm depth of soil,invertase activity were increased by 33 .84%,21 .59%,25 .15%,diastase activity by 20 .90%,13 .43%,12 .69%,cellulase activity by 39 .13%, 17 .39%,4 .34%,peroxidase activity by 7 .81%,2 .08%,3 .65%.Soil invertase,diastase,cellulase,peroxidase and labile organic carbon fractions and carbon pool management index were significantly positive correla-tion .With the increase in invertase activities,it was benefit to increase the concentration of total organic carbon,soil labile organic car-bon and soil microbial biomass carbon,and the invertase played a vital role in the accumulating of soil organic carbon pool,soil cellulase has great effect on soil organic carbon and soil labile organic carbon .Peroxidase favourable for the ac-cumulation of total organic carbon .No tillage with straw cover is suitable for the healthy and stable development of the farmland ecosystem in this region as an important way to reduce losses for carbon pool .关键词
耕作措施/土壤有机碳/土壤酶/活性碳组分Key words
tillage methods/soil organic carbon/soil enzymes/soil labile organic carbon fractions分类
农业科技引用本文复制引用
张英英,蔡立群,武均,齐鹏,罗珠珠,张仁陟..不同耕作措施下陇中黄土高原旱作农田土壤活性有机碳组分及其与酶活性间的关系[J].干旱地区农业研究,2017,35(1):1-7,7.基金项目
国家自然科学基金（31160269，31571594）；“十二五”循环农业科技工程项目（2012BAD14B03）；甘肃省干旱生境作物学重点实验室-省部共建国家重点实验室培育基地开放基金（GSCS－2013－13）；甘肃省高等学校科研项目 （）
