摘要
[目的]研究不同造林密度对油松人工林林下植物群落结构、物种多样性及土壤理化性质的影响,确定适宜的水土保持林经营管理密度,为砒砂岩区油松人工林生态功能提升和可持续发展提供参考依据。[方法]以准格尔旗西黑岱徐家门前沟坡面油松人工林为研究对象,通过野外取样调查及室内实验,探究4种造林密度(950,2000,3250,4300株/hm^(2))条件下林下草本植物群落组成、物种多样性和土壤理化性质的相互关系。[结果]①研究区林下草本植物共有9科19属33种,植物种数在造林密度为3250株/hm^(2)时最多。油松林下草本植物群落主要以禾本科(Gramineae)、菊科(Compositae)、豆科(Fabaceae)、蔷薇科(Rosaceae)植物为主,随着造林密度增加,伴生优势种由阳生、中生性物种向阴生性物种过渡。②不同造林密度处理下,林下草本层物种多样性指数、植株高度、生物量以及土壤有机质、速效氮磷钾含量、土壤含水量均表现为:3250株/hm^(2)>4300株/hm^(2)>950株/hm^(2)>2000株/hm^(2)。③造林密度对林下土壤含水量、有机质以及速效氮磷钾含量影响显著(p<0.05),对植物物种多样性指数则无显著影响(p>0.05)。在相关性分析中,土壤有机质、速效氮磷钾含量与草本层物种多样性指数之间关系最为密切。[结论]准格尔旗砒砂岩区油松人工林造林密度在3250株/hm^(2)时更利于其林下植物的生长和土壤肥力的改良。
[Objective]The effects of different planting densities on plant community structure,species diversity,and soil physicochemical properties of Pinus tabulaeformis plantation were studied,and the appropriate management density of soil and water conservation forest were determined to provide reference for the improvement of ecological function and sustainable development of P.tabulaeformis plantation in the arsenic sandstone area.[Methods]Taking P.tabulaeformis plantation on the slope of Xujiamen Qiangou in Xiheidai of Zhungeer Banner as the research site,the relationship between understory herbaceous plant community composition,species diversity and soil physical and chemical properties under four planting densities(950,2000,3250,4300 plant/hm^(2))was explored through field sampling and indoor investigation.[Results]①There were 33 species from 9 families and 19 genera in the study area,and the number of plant species was the highest when the afforestation density was 3250 plant/hm^(2).The understory herbaceous plant communities of P.tabulaeformis were mainly Gramineae,Compositae,Fabaceae and Rosaceae.With the increase of afforestation density,the associated dominant species transited from sunny and mesophytic species to shady species.②The species diversity index,plant height,biomass,soil organic matter,available nitrogen,phosphorus and potassium content,and soil water content in the understory herbaceous layer were 3250 plants/hm^(2)>4300 plants/hm^(2)>950 plants/hm^(2)>2000 plants/hm^(2).③Afforestation density had significant effects on soil water content,organic matter and available nitrogen,phosphorus and potassium content(p<0.05),but had no significant effects on plant species diversity index(p>0.05).In the correlation analysis,soil organic matter,available nitrogen,phosphorus and potassium content were most closely related to the species diversity index of herbaceous layer.[Conclusion]The planting density of 3250 plant/hm^(2) was more conducive to the growth of understory plants and the improvement of soi
作者
樊东
杨振奇
秦富仓
张铁军
王鑫
Fan Dong;Yang Zhenqi;Qin Fucang;Zhang Tiejun;Wang Xin(College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China;Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Inner Mongolia Academy of Forestry Sciences,Hohhot,Inner Mongolia 010010,China)
出处
《水土保持通报》
CSCD
北大核心
2024年第6期68-76,共9页
Bulletin of Soil and Water Conservation
基金
内蒙古自治区科技计划项目“黄河十大孔兑流域生态修复空间精准识别与智慧水土保持技术”(2021GG0052)
内蒙古自治区“科技兴蒙”行动重点专项(2022EEDSKJXM003)
鄂尔多斯重点水土流失区生态系统(西黑岱流域)水土保持综合整治技术集成效益评估项目
国家自然科学基金项目(42307463)
内蒙古自然科学基金项目(2021BS04009)。
关键词
林下植物多样性
造林密度
植被恢复
油松人工林
砒砂岩区
understory plant diversity
afforestation density
vegetation restoration
Pinus tabulaeformis plantation
arsenic sandstone area
