| 引用本文: | 张 菁,江 山,王改玲.安太堡露天矿不同复垦年限苜蓿地土壤养分和酶活性剖面特征[J].灌溉排水学报,2018,37(1):42-48. |
| ZHANG Jing,JIANG Shan,WANG Gailing.安太堡露天矿不同复垦年限苜蓿地土壤养分和酶活性剖面特征[J].灌溉排水学报,2018,37(1):42-48. |
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| 摘要: |
| 【目的】揭示土地复垦对矿区土壤肥力的影响。【方法】选择安太堡露天矿排土场复垦3、8和20 a的苜蓿地为研究对象，研究了苜蓿地0~10、10~20、20~30、30~40 cm土层深度中土壤养分和土壤酶活性之间的关系，同时与自然恢复土壤和原地貌土壤进行了比较分析。【结果】土壤有机质、全氮和碱解氮质量分数和土壤蔗糖酶、脲酶和碱性磷酸酶的酶活性都随复垦年限延长呈递增趋势，而土壤全磷质量分数呈递减趋势，有效磷质量分数和过氧化氢酶活性随时间变化不规律；除复垦3年苜蓿地的有效磷外，土壤有机质、全氮、碱解氮、全磷和有效磷质量分数和土壤酶活性都随着土层深度的增加而递减，0~20 cm土壤养分的质量分数明显高于底层。土壤脲酶、蔗糖酶和碱性磷酸酶与有机质、全氮、碱解氮和全磷都呈显著正相关关系，而过氧化氢酶与土壤养分的相关性不显著，说明土壤酶活性的高低可以反映土壤养分转化的强弱。【结论】多年苜蓿的复垦利于土壤养分的积累和土壤酶活性的提高，对于土壤肥力的恢复有重要意义。 |
| 关键词: 土壤养分； 土壤酶活性； 复垦年限； 剖面特征； 苜蓿地 |
| DOI：10.13522/j.cnki.ggps.2017.0287 |
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| Soil Profile Characteristics of Soil Nutrients and Enzyme Activity after Reclaiming Alfafa in Antaibao Opencast Coal Mine |
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ZHANG Jing, JIANG Shan, WANG Gailing
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College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
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| Abstract: |
| 【Objective】Study the impact of land reclamation on soil fertility in mine area. 【Method】3 alfalfa lands in Antaibao Opencast Coal Mine Dump reclaimed for 3 years, 8 years and 20 years were selected as research objects in this study, meanwhile the soil under nature restoration and original landform plots were collected as control soils. The relationship between soil nutrients and enzyme activities in 0～10, 10～20, 20～30 cm and 30～40 cm soil layers in alfalfa field were analyzed. 【Result】 The results showed that the mass fraction of organic matter, total nitrogen and alkaline hydrolysis nitrogen and the activities of invertase, urease and alkaline phosphatase increased with increase of reclamation years, while total phosphorus tended to decrease. The change trend of available phosphorus and the activity of catalase were irregular with increasing reclamation years. Except for the available phosphorus in alfalfa fields reclaimed 3 years, the mass fraction of soil organic matter, total nitrogen, total phosphorus, available phosphorus and enzyme activities were decreased with the increase of soil depth. What’s more, the mass fraction of soil nutrients in 0～20 cm was significantly higher than that in the bottom layer. A significant positive correlation was found between soil urease, invertase, alkaline phosphatase and organic matter, total nitrogen, total phosphorus and available nitrogen, but no significant correlation between catalase and soil nutrient. So soil enzyme activity level could reflect the strength of soil nutrient transformation. 【Conclusion】 It can be indicated that reclamation of mining area soil with alfalfa cultivation can improve the soil nutrients and the soil enzyme activities, which has important significance for the restoration of soil fertility. |
| Key words: soil nutrient; soil enzyme activity; reclamation years; profile characteristics; alfalfa field |
