摘要
研究不同复垦模式对采煤沉陷区复垦土壤团聚体分布特征及稳定性的影响,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),分析土壤机械稳定性和水稳性团聚体含量以及团聚体稳定性。结果表明:不同复垦模式机械稳定性团聚体均以>0.25mm大团聚体为主,最高的文冠果植被复垦地达到了86.36%;水稳性团聚体含量中大团聚体含量有所下降,0-20cm表层土壤中文冠果植被的大团聚体含量极显著高于对照,20-40cm的下层土壤欧李和长柄扁桃的大团聚体含量显著高于文冠果复垦地。土壤团聚体稳定率表现为0-20cm表层土壤文冠果复垦模式显著高于对照,文冠果复垦地团聚体稳定性最好,而20-40cm下层土壤以长柄扁桃复垦地团聚体稳定性最好。结合当地生长条件以及植被的长势得出文冠果可以作为采煤沉陷区复垦的首选植被,值得在神府东胜采煤沉陷区推广应用。
Composition and stability of soil aggregates among reclaimed soil of coal-mining subsidence were studied under different reclamation method in Shenfudongsheng coal mining subsidence reclamation soil,which provides a theoretical basis for the selection of suitable vegetation and enhancement of soil fertility. Treatments were control,Xanthoceras sorbifolia,Cerasus humilis and Amygdalus pedunculata. The results showed that content of soil mechanical-stable aggregates（〉 0. 25mm） was the most. The most content was at X. sorbifolia reclamation land,and reached 86. 36%. Content of big aggregates was decreased in water-stable aggregates. Content of big aggregates in X. sorbifolia reclamation land was significantly higher than that of control in 0-20 cm top soil. Content of big aggregates in C. humilis and A. Pedunculata reclamation land were significantly higher than that of X. sorbifolia vegetation. Stability rates of soil aggregates in X. sorbifolia vegetation reclamation land was significantly higher than that of control in 0-20 cm top soil and was the best in 0-20 cm top soil. While it was the best in 20-40 cm subsoil of A. Pedunculata reclamation land. So,combined with the local growing conditions and vegetation growing,X. sorbifolia can be drawn as the preferred vegetation for reclamation of coal mining subsided land in Shenfudongsheng coal mining area.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2016年第12期170-174,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
土壤团聚体
稳定性
采煤沉陷区
复垦
神府东胜矿区
soil aggregates
stability
coal mining subsidence
reclamation soil
Shenfudongsheng coal mining
