干旱区生态环境知识资源中心(Arid): 土壤研磨粒径和硫酸钾浸提浓度对可溶性有机碳测定的影响

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	土壤研磨粒径和硫酸钾浸提浓度对可溶性有机碳测定的影响
其他题名	Effects of Particle Size and Leaching Solution Concentration on the Analytical Methods of Soil Dissolved Organic Carbon
	杨金钰; 马雪琴; 唐光木; 王治国; 许咏梅
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2015
卷号	52 期号:1 页码:151-156
中文摘要	【目的】明确土壤不同研磨粒径和硫酸钾浸提剂浓度,对土壤可溶性有机碳测定结果的影响。【方法】以新疆灌耕土、灰漠土为研究对象,将土壤样品研磨处理为2、1和0.25 mm三种粒径,浸提剂K_2SO_4采用0.25和0.5 mol/L两种浓度,浸提后采用TOC仪测定土壤可溶性有机碳(DOC)。【结果】在2 mm粒径,K_2SO_4 0.25 mol/L浓度浸提条件下测试的土壤DOC含量显著高于其余处理(P <0.05),平均浸提率最高,为2.96%;而1 mm粒径、K_2SO_4 0.25 mol/L和1 mm粒径、K_2SO_4 0. 5 mol/L浓度浸提的土壤DOC含量最低(P< 0.05),平均浸提率为1. 25%、1. 97%,显著(P <0. 05)低于其他方法。测试数据的变异系数表明,研磨粒径2 mm、K_2SO_4浸提剂浓度0. 5 mol/L时获得的DOC测试结果变异系数最小,测定的土壤DOC含量与土壤有机碳、全氮之间呈显著或极显著正相关关系,与速氮含量相关性不显著。研磨粒径1 mm、K_2SO_4浓度0.25 mol/L 时的测定结果变异系数最大。【结论】土壤研磨粒径2 mm,浸提剂K_2SO_4浓度0.5 mol/L时,新疆灌耕土和灰漠土 DOC测定的结果一致性好,可靠性高。
英文摘要	【 Objective】 To discuss the effects of particle size and leaching solution concentration on the analytical methods of soil dissolved organic carbon. 【 Method】 Cultivation - farming soil and grey desert soil were taken as the subjects, and three particle sizes, two leaching solution concentrations were applied to measure the soil dissoluble organic carbon by TOC analyzer. 【Result 】 Compared with the results,average DOC contents were relatively high by 2 mm -0. 25 mol/L K_2SO_4,and relatively low by 1 mm -0. 25 mol/L K_2SO_4. 2 mm -0. 5 mol/L K_2SO_4 with the least variation coefficient of 0. 30%,method 2 displayed the maximum variation coefficient of 6. 44% . Compared with the eciencies of extractants, the highest was method 1, method 4 was the second,method 6 was the third,the lowest was 1 mm -0. 25 mol/L K_2SO_4. The concentrations of DOC by 2 mm-0.5 mol/L K_2SO_4 extracting had a significant correlation (P<0.05) with soil organic carbon and total nitrogen.【Conclusion 】Therefore, taking the extraction rate and the stability and the correlation with soil properties into account,2 mm -0. 25mol/L K_2SO_4 was the best method to extract the DOC concentration of cultivation - farming soil and grey desert soil.
中文关键词	土壤研磨粒径 ; 硫酸钾浸提浓度 ; 可溶性有机碳
英文关键词	soil particle size leaching solution concentration dissoluble organic carbon
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5381527
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233527
作者单位	新疆农业科学院土壤肥料与农业节水研究所/绿洲养分与水土资源高效利用重点实验室, 乌鲁木齐, 新疆 830091, 中国
推荐引用方式 GB/T 7714	杨金钰,马雪琴,唐光木,等. 土壤研磨粒径和硫酸钾浸提浓度对可溶性有机碳测定的影响[J],2015,52(1):151-156.
APA	杨金钰,马雪琴,唐光木,王治国,&许咏梅.(2015).土壤研磨粒径和硫酸钾浸提浓度对可溶性有机碳测定的影响.新疆农业科学,52(1),151-156.
MLA	杨金钰,et al."土壤研磨粒径和硫酸钾浸提浓度对可溶性有机碳测定的影响".新疆农业科学 52.1(2015):151-156.