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1.辽宁工程技术大学 环境科学与工程学院, 辽宁 阜新 123000
2.矿山重大灾害防治与环境;修复协同创新中心, 辽宁 阜新 123000
3.中煤平朔集团有限公司生态产业管理中心, 山西 朔州 036000
Received:25 November 2024,
Revised:2025-01-16,
Published:10 June 2025
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王东丽, 石嫱嫱, 赵晓亮, 等.平朔煤矿废弃地刺槐凋落物水文变化与养分归还潜力[J].水土保持通报,2025,45(3):1-9.
Wang Dongli, Shi Qiangqiang, Zhao Xiaoliang, et al. Hydrological shifts and nutrient return potential in Robinia pseudoacacia litters in Pingshuo coal mine wasteland[J]. Bulletin of Soil and Water Conservation,2025,45(3):1-9.
王东丽, 石嫱嫱, 赵晓亮, 等.平朔煤矿废弃地刺槐凋落物水文变化与养分归还潜力[J].水土保持通报,2025,45(3):1-9. DOI: 10.13961/j.cnki.stbctb.2025.03.004. CSTR: 32312.14.stbctb. 2025.03.004..
Wang Dongli, Shi Qiangqiang, Zhao Xiaoliang, et al. Hydrological shifts and nutrient return potential in Robinia pseudoacacia litters in Pingshuo coal mine wasteland[J]. Bulletin of Soil and Water Conservation,2025,45(3):1-9. DOI: 10.13961/j.cnki.stbctb.2025.03.004. CSTR: 32312.14.stbctb. 2025.03.004..
目的
2
研究平朔露天矿排土场20~30 a人工林凋落物的水文特征和养分归还潜力对其衰退变化的响应,为退化人工林的生态修复提供科学依据。
方法
2
以平朔矿区刺槐纯林与刺槐—榆树混交林不同衰退程度林分凋落物为研究对象,研究其存量、持水特性、养分含量及归还潜力。
结果
2
①混交林重度衰退时凋落物蓄积量较正常林明显多49.4%(
p
<
0.05)。 ②随衰退程度的增强,两种林分凋落物的最大持水量总体均呈上升趋势。吸水速率的变化过程表现为前期吸水速率降低较快,后期变化趋缓。刺槐—榆树混交林的凋落物最大持水量、最大持水率和持水率均高于刺槐纯林。 ③刺槐—榆树混交林的凋落物C含量是刺槐纯林2.11倍。刺槐纯林重度衰退时较正常林N,K含量分别显著增加0.9%,0.13%(
p
<
0.05)。刺槐—榆树混交林重度衰退时较正常林P,K含量分别显著增加0.07%,0.04%(
p
<
0.05)。不同林分不同衰退程度的C,N,K养分潜在归还量均存在差异显著性(
p
<
0.05)。
结论
2
矿区人工林衰退增强了其凋落物的持水性及养分归还潜力,有利于退化林地的改善,且刺槐—榆树混交林相对占优势。
Objective
2
The hydrological characteristics and nutrient return potential of litter in 20—30-year-old artificial forests on the Pingshuo open-pit coal mine wasteland, and their response to degradation dynamics were investigated, in order to provide a scientific basis for the ecological restoration of degraded artificial forests.
Methods
2
Taking the litterfall of different degraded
Robinia pseudoacacia
pure forest and
R. pseudoacacia
-
Elmus pumila
mixed forest in Pingshuo mining area as the research object, the stock, water-holding characteristics, nutrient content and retur
n potential were studied.
Results
2
① The litter accumulation in severely declined mixed forests was significantly higher by 49.4% compared to normal forests (
p
<
0.05). With an increasing degree of decline, the maximum water-holding capacity of litter generally increased in both forest types. The water absorption rate showed a rapid decrease in the early stage and a gradual change in the later stage. The maximum water holding capacity, maximum water holding rate, and water holding rate of litter in
R. pseudoacacia
-
E. pumila
mixed forests were higher than those in
R. pseudoacacia
forests. The carbon content of litter in
R. pseudoacacia
-
E. pumila
mixed forests was 2.11 times that in
R. pseudoacacia
forests. In severely degraded
R. pseudoacacia
forests, nitrogen and potassium contents significantly increased by 0.9% and 0.13%, respectively, compared with those in relatively intact forests (
p
<
0.05). In severely degraded
R. pseudoacacia
-
E. pumila
mixed forests, phosphorus and potassium contents significantly increased by 0.07% and 0.04%, respectively, compared with relatively intact forests (
p
<
0.05). There were significant differences in the potential return amounts of carbon, nitrogen, and potassium nutrients among the different forest types and degrees of decline (
p
<
0.05).
Conclusion
2
The decline in artificial forests in the mining area enhanced the water-holding capacity and nutrient return potential of the litter, which is beneficial for the improvement of degraded forest lands.
R. pseudoacacia
-
Elm
mixed forests exhibited relative advantages in these respects.
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