不同管理措施对铝矿废弃地复垦区土壤有机碳的影响  

Effects of Different Management Measures on Soil Organic Carbon of Reclaimed Minesoils in Abandoned Aluminum Mining Land

作　　者：原芩[1] 梅娟[1] 李华[1] 张强[2] 郜春花[2] 张秋华[1] 

机构地区：[1]山西大学环境与资源学院,太原030006 [2]山西省农业科学院农业环境与资源研究所,太原030006

出　　处：《农业环境科学学报》2012年第7期1374-1380,共7页Journal of Agro-Environment Science

基　　金：国家科技支撑计划项目(2008BAD95B04)

摘　　要：试验设置于山西省孝义铝矿废弃地复垦区,采用施肥及轮作双因素完全随机区组设计,研究铝矿废弃地复垦过程中不同管理措施对玉米田土壤有机碳的影响。结果表明,不同管理措施下,土壤有机碳含量随着土层深度的增加而降低,土壤δ13C值随着土层深度的增加而增加;施肥能显著提高土壤有机碳含量,其中以有机+无机肥为最佳施肥方式,与对照相比,在前茬种植晋豆28和晋豆25条件下,土层0～20cm的有机碳含量分别提高了1.85、1.35g.kg-1,土层20～40cm的有机碳含量分别提高了1.50、1.45g.kg-1;与前茬种植晋豆25的轮作方式相比,前茬种植晋豆28处理的土壤δ13C值普遍偏低;玉米籽粒δ13C值显著高于秸秆,说明玉米籽粒比秸秆更容易富集13C,但玉米籽粒和秸秆的δ13C值之间无显著相关性;豆科作物-玉米轮作的土壤有机碳主要来源于豆科作物,前茬晋豆28和晋豆25对土壤有机碳的贡献率分别为64.82%、60.64%。以上结果表明,在铝矿废弃地的复垦过程中,采取施肥配合轮作的管理措施有利于土壤有机碳的积累。This field study was conducted in a corn cropping system in reclaimed minesoils of the aluminum mining wasteland in 2010 in Xi- aoyi County, Shanxi Province in north of China. The purpose is to characterize the soil organic under different applications of：organic ma- nures, organic manures compound with inorganic fertilizer, inorganic fertilizer, and control treatment, i.e. without any fertilizer in the inter- planting system of bean（Jindou28 and Jindou25 ） and maize （Yitian 18 ）. The randomized complete block design was used in reclaimed mine- soils with each treatment in triplicate. Results showed that deeper soil corresponded to reducing soil organic carbon but increasing δ^13C val- ues. Fertilization significantly increased soil organic carbon content, and organic manures compound with inorganic fertilizer was the best fer- tilization pattern. In the field previously planted with Jindou28 and Jindou25, the organic carbon content increased by 1.85 g.kg^-1 and 1.35 g.kg^-1 at 0-20 cm soil layers and by 1.50 g.kg^-1 and 1.45 g.kg^-1 at 20-40 cm soil layers. On the other hand the field previously planted with Jindou25 showed better results than Jindou28 in terms of δ^13C values in soil. Maize grain accumulated much more ^13C than stem, as evidenced by the statistically significant difference, in spite that no significant correlation was found. It was noted that the organic carbon mainly came from leguminous plants in both crop rotation patterns with beans and corn, and the contributions of Jindou28 and Jindou25 in soil organic carbon were 64.82% and 60.64%. Overall, both fertilization and rotation can improve the accumulation of soil organic carbon in aluminum mining wasteland.

关 键 词：铝矿废弃地 复垦区 土壤有机碳 施肥 轮作 

分 类 号：S153.6[农业科学—土壤学]