搭配营造大芸的多种寄主林暨防风固沙林模式

Windbreak and Sand-Fixation Forest Model for Cistanche deserticola

根据实践经验和实地考察结果,提出以寄主与寄生物在生长期充分利用足够的阳光、风干、防风、固沙、提高植被覆盖率及适应现代节水技术为一体的相互独立、互不影响的搭配营造模式。模拟实验表明:①寄主树荫高度与地形条件、树的位置、树高度、树的弯度、时间及阳光照射角度有密切的关系;②主寄主菱形布置时每棵主寄主和寄生物都充分利用正常生长所需的阳光;③以高度不同的副寄主林从矮到高沿着主寄主与主风向按10°～45°布置,起减弱风速、分风及滞风的作用;④副寄主的阶梯型布置,起过滤作用;⑤副寄主的交错布置对过滤后的风起预防旋风和平衡作用。

According to practical experience and field investigation results, an independent collocation mode was put for^yard that host and parasite make full use of sunshine, air drying, windbreak, sand-fixation, improve vegetation coverage rate and adapt to the modem water sav- ing technology. Simulation results show that： （l） The host tree height is closely related with the terrain conditions, position or trees, tree height, tree bending, time and sunshine illuminate angle; （2） The main host prismatic when decorating, every tree main host and parasite are fully use normal growth required sun. （3） The vice host forest with different height arranged from low to high along the main host in 10 -45° angle play weakening wind speed, dividing wind and lagging wind effect ; （4） The vice host ladder type play the role of filtering ; （5） The vice host alternative arrangement play prevention cyclone and balance effect to filtered wind up.