库布齐沙漠沙柳林复壮更新技术措施研究

Research on Rejuvenation Technology of Salix psammophila in the Hobq Desert

沙柳是干旱、半干旱地区重要的防风固沙树种和工业用材林树种。研究沙柳复壮更新技术措施对于维护区域生态环境,促进沙柳相关产业的快速、可持续发展具有重要的现实意义。本文以库布齐沙漠东段衰退的沙柳林为研究对象,探讨了"设置沙障"、"地表平茬"、"常规平茬"、"施肥"和"不同密度造林"对沙柳高生长和地径两个形态指标的影响。试验结果表明:5种不同复壮更新技术措施对沙柳的高生长和地径生长均有显著促进作用(P<0.05);其中,密度为4 m×2m、3 m×2m的设置对沙柳的高生长和地径增长均有显著促进作用,"施肥"的处理对沙柳的高生长效果比较显著,"设立沙障"的处理对沙柳的地径生长效果更好。

Salix psammophila is an important species for windbreak, sand - fixation and industrial timber forest in arid and semiarid area. It is important to research on rejuvenation and replacement cultivated technology of Salix psammophila for protection and construction of ecological Environment. It can also promote the sustainable development of industries which related to Salix psammophila. The research took the declined Salix psammophila in the east of the Hobq Desert as study object. Five kinds of different treatments were conducted to find the effect factors on Salix psammophila height growth and stem growth, including installation of artificial sand - break, leveling stubble along the surface of the ground, usual leveling stubble, fertilization, different densities of afforestation. The results showed that five kinds of different treatments were all benefit to rejuvenation and replacement of Salix psammophila （P 〈0.05 ）. Comprehensive effect of densities （4 m × 2m or 3 m × 2m） was better. Otherwise, comprehensive effect of fertilization was beneficial to height growth of Salix psammophila. On the other hand, installation of artificial sand - break had much more effect on stem growth.