石羊河下游三种立地梭梭柠条混交造林效果  

E£fects of Afforestation in Mixed Forest of Haloxylon ammodendron and Caragana at Three Site Conditions in Lower Reaches of Shiyang River

作　　者：李琰君 刘永刚[1] 许丽[1] 王菊莲 姜俊基 李英 李建庆 曾祥新 甘顺天 赵亚青 LI Yanjun;LIU Yonggang;XU Li;WANG Julian;JIANG Junji;LI Ying;LI Jianqing;ZENG Xiangxin;GAN Shuntian;ZHAO Yaqing(Shiyang River Forestry Center ofWuwei 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》2023年第1期38-41,共4页Journal of Gansu Forestry Science and Technology

基　　金：武威市自然科学基金项目(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,WW2202RPZ030);甘肃省林草局科技项目(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,2022kj056)。

摘　　要：民勤境内梭梭、柠条人工混交造林效果日趋低下。以半固定沙丘、丘间滩地、盐碱地5 a生梭梭、柠条人工混交林为对象,样地法调查土壤理化性质,及造林树种保存率、冠幅和生物量。结果表明:1)半固定沙丘、丘间滩地梭梭保护率>78%,显著优于盐碱地,丘间滩、盐碱地的柠条保存率>50%,明显优于半固定沙丘;2)梭梭枝冠生长和生物量积累均以半固定沙丘为优,以盐碱地为劣,柠条则以丘间为优,以半固定沙丘为劣;3)梭梭适应半固定沙丘风沙环境而忌避盐碱,柠条则适应丘间地土壤黏重环境而忌避风沙,相对于梭梭较耐盐碱。分析认为,3种立地上梭梭、柠条混交造林成林效果差异明显,不应一味使用相同混交模式营造防风固沙林。The artificial mixed afforestation effect of H.ammodendron and Caragana in Minqin is decreasing.In this study,the 5 year old mixed forest of H.ammodendron and Caragana in semi-fixed dune,interdune beach and saline-alkali soil was taken as the object,the soil physical and chemical properties,conservation rate,crown width and biomass of planted tree species were investigated.The results showed as follows:1)The protection rate of H.caragana in semi-fixed dune and interdune beach was 78%,which was significantly better than that in saline-alkali land;the preservation rate of Caragana in interdune beach and saline-alkali land was 50%,which was significantly better than that in semi-fixed dune;2)The crown growth and biomass accumulation of H.ammodendron were best in semi-fixed dune and worst in saline-alkali land,while Caragana was best in interhill and worst in semi-fixed dune.3)H.ammodendron adapted to the wind-sand environment of semi-fixed dune but avoided salt and alkali,while Caragana adapted to the soil viscosity environment of interdune but avoided windsand and was more salt-alkali tolerant than H.ammodendron.According to the analysis,the mixed afforestation effect of three kinds of H.ammodendron and Caragana on the site was different,so the same mixed afforestation pattern should not be used to build windbreak and sand fixation forest.

关 键 词：石羊河 梭梭 柠条 混交造林 立地 

分 类 号：S728.4[农业科学—林木遗传育种] S728.5[农业科学—林学]