黄土区露天煤矿不同复垦模式对土壤水稳性团聚体稳定性的影响
发布时间：2018-08-20 08:30
【摘要】：为了解不同复垦模式对土壤水稳性团聚体稳定性的影响,选择山西省朔州市安太堡露天矿排土场为研究区,采取典型小区调查的方法,分析了复垦21、22 a的4种混交林复垦模式(刺槐+油松、刺槐+榆树+臭椿、刺槐+柠条+沙棘、沙棘+榆树)、2种纯林复垦模式(刺槐纯林、沙棘纯林)以及复垦耕地的土壤水稳性大团聚体的含量、土壤团聚体的稳定率(WSAR)、几何平均直径(GMD)、平均重量直径(MWD)、破坏率(PAD),并通过和原地貌及未复垦地相应指标进行对比,来研究不同复垦模式对土壤水稳性团聚体稳定性的影响。研究结果表明:经多年复垦后,土壤水稳性团聚体的稳定性有了显著提高,在团聚体DR0.25(0.25 mm团聚体质量)、WSAR、MWD和GMD值上呈现出4种混交林复垦模式2种纯林复垦模式未复垦林地,以及林地内排耕地的总体趋势;土壤水稳性团聚体PAD值呈现出相反的排序。上述复垦模式中,刺槐+油松复垦模式下土壤水稳性团聚体的稳定性最好。土壤水稳性团聚体稳定性的评价指标中,DR0.25、WSAR、MWD与GMD之间相互呈极显著正相关,且均与PAD呈极显著负相关。该研究结果可为黄土区露天煤矿土地复垦及土壤重构提供一定依据。
[Abstract]:In order to understand the influence of different reclamation models on the stability of soil water stable aggregates, the dump of Antaibao opencast mine in Shuozhou City, Shanxi Province was selected as the study area and the investigation method of typical plot was adopted. Four reclaimed models (Pinus pseudoacacia tabulaeformis, Robinia pseudoacacia Elm, Hippophae korshinskii, Hippophae rhamnoides) in the mixed forest (Pinus pseudoacacia, Pinus pseudoacacia) for 22 years were analyzed. The content of soil water stable aggregates, the stability rate of soil aggregates, the (WSAR), geometric mean diameter, (GMD), mean weight diameter, (MWD), damage rate, (PAD), and the corresponding indexes of the original landforms and unreclaimed land were compared with those of the pure Hippophae rhamnoides forest. To study the effects of different reclamation models on the stability of soil water stable aggregates. The results showed that after many years of reclamation, the stability of soil water stable aggregates was improved significantly, and there were four mixed forest reclamation models, two pure forest reclamation models, two unreclaimed woodlands on the DR0.25 (0.25mm aggregate mass) values of WSARN MWD and GMD. The PAD values of soil water stable aggregates showed the opposite order. Among the above reclamation models, the stability of soil water stable aggregates was the best under the model of Pinus pseudoacacia tabulaeformis (Pinus tabulaeformis). In the evaluation index of soil water stable aggregate stability, the correlation between DR0.25WSARMWD and GMD was very significant positive correlation, and the correlation between DR0.25WSARMWD and PAD was extremely significant negative correlation. The results can provide a basis for land reclamation and soil reconstruction in open pit coal mines in loess area.
【作者单位】： 中国地质大学(北京)土地科学技术学院;国土资源部土地整治重点实验室;
【基金】：国土资源部公益性行业科研专项——典型露天煤矿复垦生物多样性恢复研究(201411017)~~
【分类号】：S152
[Abstract]:In order to understand the influence of different reclamation models on the stability of soil water stable aggregates, the dump of Antaibao opencast mine in Shuozhou City, Shanxi Province was selected as the study area and the investigation method of typical plot was adopted. Four reclaimed models (Pinus pseudoacacia tabulaeformis, Robinia pseudoacacia Elm, Hippophae korshinskii, Hippophae rhamnoides) in the mixed forest (Pinus pseudoacacia, Pinus pseudoacacia) for 22 years were analyzed. The content of soil water stable aggregates, the stability rate of soil aggregates, the (WSAR), geometric mean diameter, (GMD), mean weight diameter, (MWD), damage rate, (PAD), and the corresponding indexes of the original landforms and unreclaimed land were compared with those of the pure Hippophae rhamnoides forest. To study the effects of different reclamation models on the stability of soil water stable aggregates. The results showed that after many years of reclamation, the stability of soil water stable aggregates was improved significantly, and there were four mixed forest reclamation models, two pure forest reclamation models, two unreclaimed woodlands on the DR0.25 (0.25mm aggregate mass) values of WSARN MWD and GMD. The PAD values of soil water stable aggregates showed the opposite order. Among the above reclamation models, the stability of soil water stable aggregates was the best under the model of Pinus pseudoacacia tabulaeformis (Pinus tabulaeformis). In the evaluation index of soil water stable aggregate stability, the correlation between DR0.25WSARMWD and GMD was very significant positive correlation, and the correlation between DR0.25WSARMWD and PAD was extremely significant negative correlation. The results can provide a basis for land reclamation and soil reconstruction in open pit coal mines in loess area.
【作者单位】： 中国地质大学(北京)土地科学技术学院;国土资源部土地整治重点实验室;
【基金】：国土资源部公益性行业科研专项——典型露天煤矿复垦生物多样性恢复研究(201411017)~~
【分类号】：S152
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