Vegetation characteristics and soil properties of artificially remediated grasslands:The case study of the Shimenhe mining area in Qilian Mountains,northwest China

The mining of limestone mines plays a crucial role in societal and economic advancement.However,mining activities have led to destructive variations in grassland ecology and soil,causing numerous environmental problems,and effective artificial restoration measures have been used to restore grasslands in the Shimenhe mining areas to different degrees.In this study,we investigated,examined and analyzed plant community structure and its correlation with soil properties across varying degrees of alpine grassland restoration in Qilian Mountains Shimenhe restoration mines using the sample method,and studied the changes in species diversity using five diversity indexes(Simpson index,Shannon index,Margalef index,Dominance index and Evenness index).This study showed that the plant community characteristics with high recovered degree(HRD)>middle recovered degree(MRD)>low recovered degree(LRD)>very low recovered degree(VLRD),11 plant genera comprising 11 species across 10 families were identified.Dominant families with robust ecological adaptability included Leguminosae,Rosaceae,Gramineae,Asteraceae,and Salicaceae.The highest Simpson,Shannon,Margalef and Evenness index of HRD grassland community species were 0.82,1.96,1.66 and 0.89,respectively.The highest Dominance index of VLRD grassland community species was 0.34,which required several restoration methods such as spraying and mulching.Soil pH and EC tended to decrease with increasing restoration,SOC,SMC,TP,AP,NH4-N,TN,AN and NO3-N tended to increase and the content of soil environmental factors contributed to vegetation growth across various restoration levels the mine grassland.In conclusion,our study indicated that the community structure gradually diversified and soil properties changed positively with the increase of restoration degrees in the Qilian Mountains Shimenhe mine,and the best results of HRD restoration were obtained.This study provides the theoretical basis for the restoration and conservation of grasslands in mining areas by demonstrating examined the correlation between plant characteristics and soil properties in restored grasslands in alpine mining areas.

Ecological Restoration Technology and Carbon Reduction Paths of Abandoned Mines in Zoige Alpine Grassland Area

At first,the ecological restoration technology of abandoned mines is summarized,and the paths and models of mine ecological restoration in Zoige grassland area under the background of carbon neutrality are analyzed.Moreover,the problems and deficiencies in the current research on mine ecological restoration in Zoige grassland area are initially identified,and the future research trend is prospected to provide a reference for the path of carbon reduction by mine ecological restoration in Zoige grassland area and other alpine grassland areas in the future.

Grasshopper Species-Area Relationship on Ungrazed and Overgrazed Grasslands

The species richness and abundance of rangeland grasshoppers were investigated at 6 sites of ungrazed and overgrazed pastures in Inner Mongolia during the autumn of 1994.The ungrazed sites supported higher richness and density of grasshoppers than the overgrazed sites.The effects of overgrazing and ungrazing on the species-area relationships of grasshoppers were directty measured.The grasshopper assemblages from the 6 sites differed significantly in the intercept or in the slopes of their species-area regressions.The greater intercept and slope values of their species-area regression were found in grasshopper assemblages on ungrazed sites.In contrast to species-area relationship regression,the species increase rate with individual number was more rapid at overgrazed sites.Implications for conservation are discussed.

Application of Self-pressure Sprinkler Irrigation Technology to Grassland Vegetation Restoration in Alpine Arid Areas

To study the application of self-pressure sprinkler irrigation technology to vegetation restoration of grassland in alpine arid areas,three treatments including fenced grassland(FG),fencedirrigated grassland(FA),and free grazing grassland(CK) were compared in respect of primary productivity.The results showed that the community coverage of FA was only 35.96% higher than that of FG and 152.69% higher than that of CK;the plant height of FA was only 76.71% higher than that of FG and 155.77% higher than that of CK;the productivity of the community in FA was only 24.10% higher than that of FG and 110.00% higher than that of CK.It indicates that the self-pressure sprinkler irrigation technology has certain demonstration and promotion potential in vegetation restoration of grassland in alpine regions and can provide a new way for the sustainable development of grassland animal husbandry in Tibet.

Study on Vegetation Characteristics & Soil Properties of Secondary Grassland in Farmland Areas Abandoned for Different Years in Minqin Oasis

[Objectives]This study was conducted to investigate the vegetation community characteristics and soil properties of secondary grassland in abandoned farmland areas of different years in Minqin Oasis. [Methods] By the method of space-for-time substitution, the changes of vegetation community characteristics(species composition, structural characteristics and important values) and soil microbial and enzyme activity were determined, and the correlation between various soil factors was analyzed. [Results](1) There were 39 species belonging to 32 genera of 15 families in the research area, including 8 shrub plants, 15 perennial herbs and 16 annual herbs.(2) Soil microbial biomass carbon, nitrogen and phosphorus contents were higher in the upper layer than in the lower layer, and the phenomenon of “surface aggregation” was obvious. The differences were different with the change of abandoned years.(3) Soil catalase content was the highest among different plots, and soil phosphatase, sucrase and urease all showed a trend of fluctuating decline with the increase in abandoned years. Soil enzyme changes were different in different soil layers. [Conclusions] This study can provide a theoretical basis for the restoration, reconstruction and rational protection and utilization of secondary grassland in abandoned farmland.

The Space Dissimilation of Stakeholders' Environment Cognitive and Behavior Preference Response in the Area from Returning Fazing Land to Grasslands

The cognition and attitudes of resources environment affect environmental behavior of behavior subject,the changes of attitude and behavior become one of the key factors of influencing harmonious and healthy development of ecological environment. With PRA survey method for obtaining questionnaire data and based on behavior geography and social psychology theory,farming-pastoral,dry grassland,desert grassland, typical project village alpine grassland of returning fazing land to grasslands as an example,with main body cognitive perspective of the aid of resources,the article analyzed space dissimilation of stakeholders environmental cognitive and behavior preference response in the area of returning grazing land to grasslands from ecological environment from policy environment,ecological environment and family economic environment aspects. The results showed that： stakeholders judgment of Grassland degradation in different ecological function area had obvious regularity,the cognitive proportion of Grassland degradation gradually increase from farming-pastora to alpine savanes. The satisfaction from returning grazing land to grasslands showed a changing tendency of reversed U. stakeholders had more strongly negative cognition in the area of dry steppe and desertsteppe. From farming-pastoral to alpine savanes,the economic environment tend to worse situation. Negative environmental behaviors tend to increase,Positive behavior on the contrary.

基于MaxEnt生态位模型预测当前气候条件下顶羽菊在中国的潜在适生区

顶羽菊Rhaponticum repens(L.)Hidalgo又称匍匐矢车菊,为我国进境植物检疫性有害生物,是一种繁殖力、抗逆性强且难以防除的杂草,可对农作物及牧草等造成危害。本研究基于顶羽菊在全球范围内的地理分布数据,以及当前条件下影响物种分布的环境因子,利用MaxEnt生态位模型预测顶羽菊在我国农田和草地区域的潜在分布。结果表明,影响顶羽菊潜在分布的主要环境变量为最干月份降水量、年平均温度、昼夜温差与年温差比值、最暖季度平均温度、最湿月份降水量、降水量季节性变异系数、最热月最高温度以及最干季度降水量。预测结果表明,顶羽菊在我国36°N-48°N,75°E-108°E范围高度适生,包括新疆西部、甘肃、宁夏、内蒙古三省交界处及周边地区;新疆东北部、宁夏南部、甘肃东南部、内蒙古中部、陕西和山西大部分地区、云南、西藏、四川、辽宁、黑龙江少许地区为中适生区。此外,顶羽菊对我国农田潜在危害面积达4.536万km^(2),占我国农田总面积的25.34%,对我国草地潜在危害面积达8.875万km^(2),占我国草地总面积的29.05%。综上所述,建议将我国内蒙古、宁夏、甘肃、新疆等地区列为顶羽菊高风险重点监测区,尽早采取防控措施,防患于未然。

高原牧区不同害鼠胃肠内容物对D型肉毒神经毒素的破坏强度分析

为探明高原牧区不同害鼠胃肠内容物对D型肉毒毒素的破坏强度与害鼠对毒素的敏感性之间的关系,采用霍恩氏法测定了D型肉毒毒素对高原鼠兔(Ochotona curzoniae)、高原鼢鼠(Eospalax baileyi)及青海松田鼠(Neodon fuscus)的灌胃半数致死剂量(LD50),并测定3种害鼠胃肠内容物及其上清液与D型肉毒毒素作用后的毒素残留量。结果表明:D型肉毒毒素对高原鼠兔、高原鼢鼠及青海松田鼠的LD50分别为5110、5840、50100 MLD/kg。害鼠胃肠内容物对毒素的破坏强度由高到低依次是青海松田鼠、高原鼢鼠、高原鼠兔。3种害鼠胃肠内容物对D型肉毒毒素的破坏作用存在差异,且LD50与毒素残留量之间呈正相关性。胃肠道环境差异是导致不同害鼠对D型肉毒毒素产生敏感性差异的原因之一,研究结果对今后选育高效、特异性D型肉毒毒素生物灭鼠剂具有指导意义。

2005-2020年中国干旱半干旱区典型草地和荒漠生态系统植被地上生物量数据集

植被生物量是全球碳循环的重要组成部分,是陆地生态系统与大气之间碳交换的重要环节,是定量研究全球气候变化与草地、荒漠生态系统之间的反馈调节作用等的基础。中国干旱半干旱区的草地、荒漠生态系统是重要的碳库类型,本文选取中国生态系统研究网络(Chinese Ecosystem Research Network,CERN)中位于中国干旱半干旱区的2个草地生态系统观测研究站(海北站、内蒙古站)和5个荒漠生态系统类型观测研究站(鄂尔多斯站、阜康站、临泽站、奈曼站、沙坡头站)的典型生态系统,对其按照CERN生态系统长期观测规范开展长期观测获取的植被地上生物量的2005–2020年间生长季的月动态实测数据进行了收集整理与质量控制,并开展了样方原始调查数据到样地尺度观测数据的统计计算,生成了植被地上生物量数据集,可为中国干旱半干旱区草地和荒漠生态系统对全球气候变化响应及植被保育与可持续发展等研究提供地面观测数据支撑。

云南省岩溶地区石漠化草原现状及分区保护与修复策略

据最新调查数据,云南省石漠化草原主要分布于曲靖、昆明、红河等5个州(市),总面积37.97万hm2,占岩溶土地面积的3.53%,其分布最广的海拔区间为1 500~2 500 m,占比47.85%,基岩裸露度分布区间为30%~94%,以植被盖度为10%~19%的分布区间面积最广,占比37.85%,绝大部分分布于土层薄甚至极薄区域,占比达92.10%。根据石漠化草原空间分布特征,在充分衔接各大生态保护和修复工程建设规划基础上,统筹考虑岩溶生态系统的完整性、地理单元的连续性和经济社会发展的可持续性,将云南省石漠化草原区划为6个分区,分区阐述石漠化草原生态保护与修复策略。

中国北方草地生态系统服务评估

北方草地是我国天然草地主体部分,其生态功能对提升生态系统稳定性、保障国家生态安全具有重要的作用。在北方草地生态功能分区基础上,开展2011—2015年不同功能区内防风固沙、土壤保持、水源涵养等生态功能评估,探明其现状和空间格局,为北方草地生态功能分区研究提供评估数据,也为推进草地生态系统保护与修复工作提供科技支撑。结果表明:(1)北方草地防风固沙能力为32.44 t hm^(-2) a^(-1),防风固沙量为89.22亿t/a。半干旱草原区防风固沙能力和固沙量最大,分别为68.76 t hm^(-2) a^(-1)和29.16亿t/a,其固沙量占北方草地固沙总量的32.68%。(2)北方草地土壤保持能力为124.5 t hm^(-2) a^(-1),土壤保持量为243.59亿t/a。土壤保持功能的空间异质性较大,暖性灌草丛区土壤保持能力最大,为431.52 t hm^(-2) a^(-1);高寒草甸区土壤保持量最多,为105.36亿t/a,占北方草地土壤保持总量的43.19%。(3)北方草地水源涵养能力为93.03 m^(3) hm^(-2) a^(-1),水源涵养量为288.98亿m^(3)/a。高寒草甸区和高寒草原区水源涵养能力较大,分别为211.09 m^(3) hm^(-2) a^(-1)和118.04 m^(3) hm^(-2) a^(-1)。两个区域的水源涵养量也较多,分别为125.36亿m^(3)/a和72.13亿m^(3)/a,合占北方草地水源涵养总量的68.34%。整体上,北方半干旱草原区、暖性灌草丛区、高寒草甸区和高寒草原区对发挥我国草地防风固沙、土壤保持、水源涵养等生态多功能效益、提升生态系统服务和稳定性具有极其重要的作用。

三江源区退化高寒草甸植被生物量和养分的动态变化

[目的]探索三江源区高寒草甸草地植被-土壤系统生物量和土壤养分的动态变化,以利于草地适应性管理和开展草地生态修复相关工作。[方法]以中度退化高寒草甸为研究对象,于2020-2022年的7、8和9月持续观测高寒草甸植被生物量(地上生物量和根系生物量)、植被(地上部和根系)和土壤(0~15和15~30 cm)全氮、铵态氮、硝态氮、速效氮、有机碳、全磷和全钾含量。植被生物量、植被养分和土壤养分在不同月份间的动态变化用单因素方差分析(One-way ANOVA)进行比较。[结果]不同月份间植被生物量存在显著的递增趋势(2021年除外)(P<0.05,下同),整体表现为9月最大,地上生物量最大值分别为74.58和72.80 g/m^(2),根系生物量最大值分别为39.82和57.32 g/m^(2)。植被(地上部和根系)和土壤(0~15和15~30 cm)养分含量存在显著的月际动态,具体表现为8月达到最大值。植被生物量与植被地上部和根系的全氮含量显著相关,与土壤0~15和15~30 cm土层的全氮含量呈显著正相关。[结论]高寒草甸植被(地上部和根系)养分与土壤(0~15和15~30 cm土层)养分在8月达到峰值。研究结果可为高寒草甸养分管理领域学者凝练科学问题提供参考。

不同饲用高粱品种在榆林风沙草滩区的生产性能及营养品质综合评价

为筛选出适宜榆林风沙草滩区膜际栽培的高产优质饲用高粱品种,采用随机区组试验,设置海狮(G1)、F1497(G2)、润宝(G3)、大奖1180(G4)、陇草一号(G5)、晋甜杂3号(G6)、晋牧1号(G7)7个处理,每个处理3次重复。分析不同饲用高粱品种的农艺性状、草产量、水分利用效率、营养品质,并进行灰色关联度评价。结果显示:G1株高(350.83 cm)显著低于G2(382.90 cm)(P<0.05),但高于其他处理;G1茎粗(24.25 mm)高于其他处理。G1鲜草产量(58.77 t/hm^(2))显著低于G4(P<0.05),但显著高于除G3外的其他处理(P<0.05);G1干草产量(21.32 t/hm^(2))高于其他处理。G1水分利用效率[22.14(kg/hm^(2))/mm]高于其他处理。G1粗蛋白含量(4.10%)显著低于G5(P<0.05);G1糖锤度(17.48%)只低于G6;G1相对饲喂价值(178.19)高于G2、G3、G4。灰色关联度评价中G1关联度排序第一。研究表明,适宜榆林风沙草滩区膜际栽培的高产优质饲用高粱品种为海狮。

高寒草地牧草生长季放牧强度对藏系绵羊体增重的影响

为探讨牧草生长季不同生长时期和放牧强度对藏羊体增重的影响,以藏系绵羊为研究对象,基于不同放牧强度在高寒草地开展了重度(每公顷5.13个羊单位)、中度(每公顷3.92个羊单位)和轻度(每公顷3.03个羊单位)的藏羊放牧试验。结果表明:1)不同年际间受环境影响,藏羊日增重存在差异,不同年际当中藏羊日增重为牧草返青期和生长期高于牧草枯黄期,且在牧草枯黄期藏羊日增重存在负增长的现象,线性回归分析结果表明藏羊日增重和牧草生长时期存在斜率为显著负相关(y=0.3088−0.1107x)的直线关系;2)牧草生长季不同放牧强度下藏羊个体日增重、暖季增重、单位草地面积增重无显著差异(P>0.05),但各年际当中藏羊暖季增重均为中度高于轻度和重度,单位草地面积增重均为轻度低于中度和重度。综上所述,不同放牧强度利用高寒草地暖季放牧场,藏羊体增重从牧草返青期到生长期再到枯黄期逐渐降低,以家畜生产为主兼顾草地的合理利用,高寒草地以中度放牧利用为宜。

基于多光谱无人机的不同放牧策略对草地叶面积指数变化动态解析

针对海南岛耕地撂荒形成的草地无序放牧较为普遍的现象,以不同放牧方式(轮牧和连续放牧)、不同放牧强度(重度、中度和轻度)进行草地放牧试验,利用多光谱无人机和植被冠层分析仪,获取放牧期间日尺度草地叶面积指数(Leaf area index,LAI)信息,定量分析不同放牧策略对草地叶面积指数及牧牛行为变化的影响。研究结果表明:(1)中度放牧条件下的轮牧有利于草地LAI的提升。重度放牧时,轮牧和连续放牧草地的LAI上升的区域占草地总面积的比例分别为3.21%和12.65%;中度放牧时,轮牧和连续放牧草地的LAI上升的区域占草地总面积的比例分别为52.01%和25.83%;轻度放牧时,轮牧和连续放牧草地的LAI上升的区域占草地总面积的比例分别为61.02%和60.37%。(2)重度放牧条件下,牛的采食时间占比始终最高,随着采食时间占比的增加,草地LAI的减少量也随之增加,但当采食时间占比增加至70.88%~73.42%时,草地LAI的减少量逐渐降低。此时,草地叶面积指数下降到初始状态(第一天啃食前)的79.60%~79.90%,即牛的啃食量已经到达了草地LAI当日能够供给的极限,当超过这个极限时,草地可食用牧草大幅减少,牲畜个体采食竞争加剧,同时牛的啃食行为时间占比大大提高。研究结果有助于优选出牧场尺度下最佳的草畜管理措施,为热带草地畜牧系统的可持续发展从新的角度提供理论方法和决策支撑,助力国家生态文明试验区(海南)的建设。

低覆盖草地叶面积指数遥感估算方法

有效估算低覆盖草地叶面积指数(LAI),对监测低覆盖草地生长状况、优化完善草地管理具有重要意义。以往针对草地叶面积指数的研究大多集中于中高覆盖度草地,对低覆盖草地的研究相对较少。利用谷歌地球引擎(GEE),基于Landsat-8卫星数据提取所需特征变量,通过特征变量与叶面积指数的相关性及其在模型中的重要性进行特征优选,确定模型最佳变量个数,以此构建机器学习模型,探寻适合在低覆盖区草地估算叶面积指数的方法。结果显示,基于相关性特征优选的梯度提升回归树模型(r-GBRT)在低覆盖草地估算叶面积指数的效果较好,测试集的R 2为0.686,均方根误差(RMSE)为0.101。结果表明,基于特征优选构建的机器学习模型在低覆盖条件下估算草地叶面积指数方面具有较好的应用价值。

基于MaxEnt模型的祁连山南麓门源草原毛虫分布区预测

【目的】门源草原毛虫Gynaephora menyuanensis是为害青藏高原高寒草甸的主要害虫,严重妨碍草地生态和畜牧业发展,了解其在祁连山南麓的实际分布区和潜在适生区对门源草原毛虫的监测和防治以及草地生态的保护具有重要意义。【方法】本研究在对祁连山南麓门源草原毛虫的分布进行大量实地调查(147个位点)的基础上,采用专业统计分析软件IBM SPSS 22.0筛选影响门源草原毛虫分布的环境因子,应用生态位模型MaxEnt 3.4.4和地理信息系统软件ArcGIS 10.8预测祁连山南麓门源草原毛虫2021-2040年的适生区范围。【结果】影响门源草原毛虫分布的主要环境因子为9月平均降水量、 9月平均太阳辐射等;2021-2040年门源草原毛虫在祁连山南麓的适生区变化趋势为高适生区和非适生区的面积呈减少趋势,中适生区和低适生区面积呈增加趋势;检测模型的受试者工作特征(receiver operating characteristic, ROC)曲线下的面积(area under ROC, AUC)值为0.924,模拟结果准确性较好。【结论】本研究结果为阐明门源草原毛虫的地理分布规律及其监测防治提供了理论参考。全球气候变化为门源草原毛虫的栖息地扩张提供了适宜的条件,建议根据门源草原毛虫的潜在适生等级,构建“分级应对”的监测和早期预警体系与防控模式,以应对害虫为害。

基于OCVOR优化模型的高寒受损煤矿区人工恢复效果评价研究

为探明高寒矿区施肥和覆土的生态恢复效果及土壤速效养分对生态系统健康的影响,将生态系统健康评价指数CVOR通过优化土壤基况设计为OCVOR指数,并采用VOR、CVOR和OCVOR指数对5种施肥梯度(分别为施磷酸二铵0.0125、0.0375、0.1125 kg/m^(2)以及1年不施磷酸二铵、5年不施磷酸二铵)和3种覆土厚度(0、20~25、40~45 cm)恢复措施下的高寒矿区人工草地生态系统健康程度和恢复效果进行评价和对比分析。结果表明:3种指数对不同施肥和覆土措施的评价结果趋于一致,中施肥(磷酸二铵0.0375 kg/m^(2))和厚覆土(40~45 cm土壤厚度)是该地区适宜的恢复措施,整体上采用覆土措施的生态系统健康水平和恢复效果低于施肥措施。OCVOR指数评价结果表明,该地区采用中施肥、重施肥(磷酸二铵0.1125 kg/m^(2))措施的生态系统为不健康和一般,轻施肥(磷酸二铵0.0125 kg/m^(2))、1年不施肥、重覆土措施的生态系统为警戒和差,中覆土(20~25 cm土壤厚度)、未覆土和5年不施肥措施生态系统为崩溃和很差。8种恢复措施下VOR、CVOR和OCVOR指数分别在0.18~0.95、0.02~0.30、0.05~0.41之间,OCVOR指数评价结果介于VOR和CVOR指数之间。与VOR和CVOR指数相比,OCVOR指数评价结果更加符合破坏程度大的高寒矿区煤矸石山人工草地生态系统健康状况和恢复实际,OCVOR模型更具有客观性和科学性。

基于Beer-Lambert方法的机载LiDAR草地叶面积指数估算研究

草地叶面积指数(Leaf area index,LAI)是天然草地的重要结构参数,能够用来监测草地的生长状况和生产力水平,对草地资源可持续利用和科学管理具有重要意义。以内蒙古锡林郭勒盟典型草原为研究对象,首先使用无人机激光雷达(Airborne light detection and ranging,Air-LiDAR)草地冠层观测数据,通过解析点云数据构建冠层高度模型(Canopy height model,CHM),随后进行研究区草地冠层间隙率计算,最后基于Beer-Lambert方法进行0.05 m、0.10 m、0.15 m、0.20 m 4个不同空间分辨率采样尺度下的LAI估算,并选择CHM低值、中值、高值3个不同子区域分别进行不同冠层高度下LAI的检验和分析。结果表明:(1)草地叶面积指数与冠层高度模型数值呈正相关、与冠层间隙率呈负相关。(2)机载LiDAR草地LAI估算的最优采样尺度为0.15 m,CHM不同高度子区域LAI结果检验R^(2)和RMSE分别为:低值区为0.66和0.04;中值区为0.54和0.34;高值区为0.54和1.17,表明无人机LiDAR可捕获草地冠层观测采样存在的异质性差异分布特征。(3)不同空间分辨率0.05~0.20 m间隔采样LAI结果表明,对于CHM低值、植被分布稀疏区域不同分辨率LAI无显著空间尺度变化差异,但CHM高值、较密植被分布群落LAI会随空间分辨率表现出尺度性差异。综上所述,本研究设计完成的无人机LiDAR草地LAI估算模型,参数机理具体、流程方法可操作性强,具有较好的数值检验精度,可为激光雷达在草地植被叶面积指数遥感反演及应用提供技术参考。

商品有机肥和羊板粪对高寒矿区人工草地和土壤特性的影响

为提高木里矿区人工草地土壤肥力,促进矿区可持续修复,在青海木里矿区修复时进行了商品有机肥、羊板粪、商品有机肥+羊板粪3种施肥处理,以未施有机肥为对照,分析生长2年的植被、土壤肥力和土壤微生物群落结构。结果表明:施肥显著(P<0.05)提高了植被高度、盖度和生物量,并改善了土壤肥力,且以两种肥料混施效果最好。3种处理均显著提高了土壤细菌丰富度(P<0.05),但对土壤真菌多样性无影响。3种处理均提高了变形菌门(Proteobacteria)和子囊菌门(Ascomycota)相对丰度,降低了担子菌门(Basidiomycota)相对丰度。相关性分析表明,植被情况与土壤肥力、土壤微生物存在显著相关性,有机肥通过增加土壤肥力和改变土壤微生物群落结构促进植被生长。因此,高寒矿区生态修复时施有机肥有利于人工植被生长,改善土壤肥力和土壤微生物群落结构,且以商品有机肥+羊板粪混施效果更好。