五道沟林场沙荒地造林及林下物种多样性研究

为了揭示木兰围场五道沟林场沙荒地造林技术效果,以油松、樟子松和黄柳恢复植被为研究对象,对3种栽植苗木成活率、树高、地径、冠幅以及恢复植被林下物种多样性进行研究,结果表明:3种苗木成活率均在98%以上,且长势良好;植被恢复林内灌木以黄柳和苦参为主,草本植物主要为1a生和多年生草本植物;2016年灌木和草本植物优势度指数分别是2015年的0.54和0.77倍;2016年草本Shannon-Wiener多样性指数是2015年的0.69倍;2016年灌木和草本植物的辛普森多样性指数、均匀度和丰富度指数均大于2015年。

Research on sandy wasteland afforestation and understory species diversity in Wudaogou forest farm

In order to reveal the land afforestation effect in Wudaogou forestry station of Mulanweichang,three kinds of planting seedlings of Pinus tabulaeformis,Pinus sylvestris var.mongolica and Salix gordejevii were used as the research objects in this paper and the survival rate,height,ground diameter,crown growth and understory species diversity were discussed.The research results are as follows:The survival rates of 3 kinds of seedlings were all above 98 ％,with good growth conditions.The dominance index of shrubs and herbs in 2016 were 0.54 and 0.77 times of that in the year of 2015;the Shannon-Wiener diversity index of herbs in 2016 was 0.69 times of that in the year of 2015;the Simpson index,evenness and richness index of shrubs and herbs in 2016 were all higher than that of 2015.