摘要
研究不同复垦模式对采煤沉陷区复垦土壤团聚体有机碳分布特征的影响,为选择适宜的复垦植被及培肥沉陷区土壤肥力提供理论依据。在神府东胜采煤沉陷区设置4种复垦模式(对照、文冠果、欧李和长柄扁桃复垦模式),分析土壤0-20cm和20-40cm两个土层机械稳定性、水稳定性团聚体有机碳以及有机碳库的构成。结果表明:文冠果植被模式提高了0-20cm表层土壤各粒级机械稳定性团聚体中有机碳的含量,欧李植被模式提高了下层土壤(20-40cm)中2-0.25mm和0.25-0.05mm机械稳定性团聚体有机碳含量,欧李和长柄扁桃植被模式对>2mm和<0.05mm水稳性团聚体有机碳形成有明显促进作用。三种复垦模式中促进作用大小顺序为欧李>文冠果>长柄扁桃。根据有机碳物理分组方法,将有机碳分为粗颗粒有机碳(c POM)、微团聚体的有机碳(m M)和粉黏粒有机碳(s+c_M),文冠果植被模式显著增加了0-20cm表层土壤19.03%的s+c_M组分有机碳,而欧李却增加了表层c POM组分的有机碳含量。下层土壤中,三种植被模式都明显增加了c POM组分的有机碳含量,以文冠果增加幅度最大。综合三种不同复垦方式,以文冠果和欧李对团聚体有机碳的贡献较大,结合当地生长条件以及植被的长势,文冠果长势优于欧李,在后续复垦植被的选择上可以选择文冠果,值得推广应用。
Organic carbon distribution in soil aggregates of coal - mining subsided field were studied under differ- ent reclamation method, which provides a theoretical basis for the selection of suitable vegetation and enhance- ment of soil fertility. Organic carbon in soil mechanical - stable aggregates, water - stable aggregates and soil or- ganic carbon pool were studied under different reclamation methods in Shenfudougsheng coal mining subsidence reclamation soil（two soil layer,0 -20cm and 20 -40cm）. Treatments were control, plantations of Xanthoceras sorbifolia Bunge, Cerasus humilis （ Bge . ） Sok and Amygdalus pedunculata Pall. The results showed that organic carbon of soil mechanical - stable aggregates in 0 - 20cm soil layer in X. sorbifolia vegetation reclamation land was increased. Organic carbon of soil mechanical- stable aggregates （2 - 0.25mm and 0.25 -0.05mm） in 20 -40cm soil layer in C. humilis vegetation reclamation land was also increased. Organic carbon of soil water - stable aggregates（ 〉 2mm and 〈0.05mm） were significantly increased in C. humilis and A. pedunculata vege- tation reclamation lands. The effects of three reclamation method were that C. humilis was the first and X. sorbi- folia was the second and A. pedunculata was the third. Based on the soil organic carbon physical fractionated SOC pools, soil organic carbon divided into coarse particulate organic matter（cPOM） and microaggregates within macroaggregates （raM） and silt plus clay fraction within macroaggregates （ s ＋ c M） physical fractionation, s ＋ c M were increased 19.03 percent in upsoil（O -20cm） in X. sorbifolia vegetation reclamation land. cPOM were increased in upsoiI （0 -20cm） in C. humilis vegetation reclamation land. cPOM were increased in subsoil in three vegetation reclamation lands and the effects of X. sorbifolia were the first, combined with the local growing conditions and vegetation growing, X. sorbifolia can be drawn as the preferred vegetation reclamation of coal min- ing subsid
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第11期105-109,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(41301605)
内蒙古自治区高等学校科学研究项目(NJZY13069)资助
关键词
采煤沉陷
土壤团聚体
稳定性
复垦
有机碳
coal mining subsidence
soil aggregates
stability
reclamation soil
organic carbon
