摘要
[目的]研究高寒湿地高速公路工程干扰后不同恢复措施下边坡土壤理化性质及酶活性变化,为高寒湿地植被恢复模式的筛选,水土流失治理,改善生态环境提供理论依据。[方法]以自然演替、喷播植草、草皮回覆3种处理边坡模式为研究对象,并以原始未扰动植被作为对照,测定土壤理化指标和土壤酶活性,分析其相互关系及影响因素。[结果](1)3种恢复措施与对照相比均导致土壤pH值、全钾显著升高(p<0.05),土壤有机质、全氮、细根生物量、速效钾显著降低(p<0.05),在自然演替处理下都最小,分别为15.16±0.15,0.75±0.01,0.60±0.27,65.00±4.50;喷播植草、草皮回覆处理下土壤颗粒中黏粉粒比例显著降低(p<0.05);喷播植草、自然演替与对照相比丰富度指数显著降低(p<0.05),在自然演替下最小,为1.29±0.02,草皮回覆与喷播植草2种恢复措施的土壤pH值、有机质、全氮、速效钾、细根生物量及其丰富度指数高于自然演替。(2)与自然演替相比,喷播植草与草皮回覆能更好地恢复蔗糖酶、脲酶、碱性磷酸酶、过氧化氢酶活性,甚至过氧化氢酶活性能恢复至接近对照,酶活性在自然演替条件下都最小,分别为12.65±10.87,0.24±0.03,0.23±0.05,1.73±0.48。(3)4种酶活性与土壤理化性质之间相关性显著,脲酶活性对土壤理化性质最为敏感,能够很好评价高原湿地边坡土壤质量。[结论]采取喷播植草、草皮回覆相对于自然演替可有效改善土壤理化性质和提高土壤酶活性,土壤酶活性能作为评价高原湿地边坡土壤质量的敏感性指标。
[Objective] The effects of soil physicochemical properties and enzyme activities on slopes under different restoration measures after disturbance from alpine wetland highway projects were analyzed in order to provide a theoretical reference for the screening of alpine wetland vegetation restoration models,soil erosion control,and improvement of the ecological environment.[Methods] We compared three slope treatments(natural succession,spraying grass planting,and turf cover) against the original undisturbed vegetation(the control).Soil physicochemical indexes and soil enzyme activities were measured,and their interrelationships and influencing factors were analyzed.[Results](1) All three restoration measures resulted in a significant increase(p<0.05) in soil pH value and total potassium compared with the control.These restoration measures also resulted in a significant decrease(p<0.05) in soil organic matter,total nitrogen,fine root biomass,and available potassium under the natural succession treatment,with minimum values of 15.16(±0.15),0.75(±0.01),0.60(±0.27),and 65.00(±4.5),respectively.The proportion of clay particles in the soil was significantly lower(p<0.05) under the spraying grass planting and turf cover treatments.The richness indices of the spraying grass planting and natural succession treatments were significantly lower(p<0.05) than observed for the control,with a minimum value of 1.29(±0.02) under the natural succession treatment.Soil pH value,organic matter,total nitrogen,available potassium,fine root biomass,and richness index were higher for the two types of restoration measures(turf cover and spraying grass planting) than for natural selection.The richness indices for the two restoration measures were higher than for natural succession.(2) Compared with natural succession,spraying grass planting and turf cover could better recover sucrase,urease,alkaline phosphatase,and catalase activity,,and even catalase activity could be recovered close to that of the control.The activities of the four enzymes were the smallest under natural succession conditions,which were 12.65±10.87,0.24±0.03,0.23±0.05 and 1.73±0.48,respectively.0.48).(3) The correlations between the activities of the four enzymes and the physical and chemical properties of the soil were significant.Urease activity was the most sensitive to the physical and chemical properties of the soil,and was able to evaluate the soil quality of the slopes of the plateau wetland very well.[Conclusion] Compared with natural succession,spraying grass planting and turf cover can effectively improve soil physical and chemical properties and increase soil enzyme activity.Soil enzyme activity can be used as a sensitive indicator for evaluating the soil quality of slopes in plateau wetlands.
作者
马龙
李亚玲
刘诗琪
尹才佳
邹书珍
康迪
Ma Long;Li Yaling;Liu Shiqi;Yin Caijia;Zou Shuzhen;Kang Di(College of Life Science,West China Normal University,Nanchong,Sichuan 637001,China;Key Laboratory of Southwest Wildlife Resources Conservation,Ministry of Education(West China Normal University),Nanchong,Sichuan 637001,China)
出处
《水土保持通报》
CSCD
北大核心
2024年第4期157-167,共11页
Bulletin of Soil and Water Conservation
基金
四川省自然科学基金项目“地震退化森林木本植物功能性状与环境的协同变化机制及生态策略”(2023NSFSC0143)
四川省交通运输科技项目“高原高速公路建设湿地保护与修复技术研究”(2019-ZL-19)。
关键词
高原湿地
草皮回覆
土壤酶活性
土壤理化性质
upland wetland
turf cover
soil enzyme activity
soil physicochemical properties
