石羊河下游人工固沙灌木林衰败现象  

Artificial Sand-fixing Shrubbery Decline Phenomenon in the Lower Reaches of Shiyang River

作　　者：王红梅 许丽[1] 刘永刚[1] 姜俊基 王菊莲 李英 WANG Hongmei;XU Li;LIU Yonggang;JIANG Junji;WANG Julian;Li Ying(Shiyang River Forestry Center of Wuwei City,Minqin Gansu 733399,China)

机构地区：[1]甘肃省武威市石羊河林业总场,甘肃民勤733399

出　　处：《甘肃林业科技》2022年第4期22-24,共3页Journal of Gansu Forestry Science and Technology

基　　金：石羊河下游人工灌木混交林生长现状及土壤理化性质研究(甘肃省林草局自列科技项目,2022kj056);石羊河下游荒漠区盐碱地人工造林植被恢复技术研究及成效评价(武威市科技局自然科学基金项目,WW2202RPZ030)。

摘　　要：石羊河下游人工固沙灌木林出现衰败现象。在石羊河林业总场大滩分场采用样地法调查2003、2006年营造的固沙灌木,通过林分高、平均冠幅、林木衰败指数评估固沙作用。结果表明:2003、2006年营造的梭梭纯林、梭梭-柠条同穴混交林4类林分形态相同,同穴混交柠条明显减轻梭梭衰败现象。研究认为,林龄>16 a时,梭梭纯林和梭梭-柠条同穴混交林的固沙作用相同;梭梭-柠条同穴混交林固沙作用比梭梭纯林更稳定。In the lower reaches of the Shiyang River,the artificially fixed shrubbery appears to decline.The sand-fixing shrubs constructed in 2003 and 2006 were investigated by sample plot method in Datan branch of Shiyang River Forestry Farm.The sand-fixing effect was evaluated by stand height,average canopy width and tree decay index.The results showed that in 2003 and 2006,the four types of stands were the same,and the mixed Caragana korshinskii forest with the same hole significantly reduced the decay of Haloxylon ammodendron.It was concluded that when the stand age was more than 16 years,the sand-fixation effect of Haloxylon ammodendron pure forest and Haloxylon ammodendron-Caragana korshinskii mixed forest was the same.The sand-fixation effect of the Haloxylon ammodendron-Caragana korshinskii mixed forest was more stable than that of the Haloxylon ammodendron pure forest.

关 键 词：石羊河 退耕还林 固沙灌木林 衰败 

分 类 号：S759.2[农业科学—森林经理学]