CAJ | 학술논문

坡位在华北落叶松人工林造林和经营措施中影响较大，坡位不适会导致森林结构的失衡和生态功能的破坏，进而引起水土流失和生物多样性降低等生态恶果。为了研究坡位对华北落叶松生长及林下物种多样性的影响，对围场县新丰林场不同坡位条件下华北落叶松人工林的生长状况及林下植被多样性进行了调查分析，结果显示：（1）坡位对林木蓄积量的影响不显著；（2）坡位对华北落叶松人工林胸径影响效果显著（在5％显著水平上），总体上呈现上坡位大于中坡位大于下坡位的趋势；（3）坡位对华北落叶松林下生物多样性的影响极显著，灌木层在不同坡位下的多样性指数和均匀度指数与草本植物层的变化趋势相似，处于上坡位的草本植物层和灌木层具有更高的物种多样性和均匀度，草本植物层的物种多样性指数平均值高于灌木层的平均值。
파위재화북락협송인공림조림화경영조시중영향교대，파위불괄회도치삼림결구적실형화생태공능적파배，진이인기수토류실화생물다양성강저등생태악과。위료연구파위대화북락협송생장급림하물충다양성적영향，대위장현신봉림장불동파위조건하화북락협송인공림적생장상황급림하식피다양성진행료조사분석，결과현시：（1）파위대림목축적량적영향불현저；（2）파위대화북락협송인공림흉경영향효과현저（재5％현저수평상），총체상정현상파위대우중파위대우하파위적추세；（3）파위대화북락협송림하생물다양성적영향겁현저，관목층재불동파위하적다양성지수화균균도지수여초본식물층적변화추세상사，처우상파위적초본식물층화관목층구유경고적물충다양성화균균도，초본식물층적물충다양성지수평균치고우관목층적평균치。
The slope has a great influence on silviculture and management measures of L arix p rincipis‐rup prechtii plantation but the discomfort slope will lead to the imbalance of forest structure and the destruction of the ecological function ,resulting in the ecological conse‐quences of soil erosion and reduction in biodiversity . To study the effect of slope on the grow th of L arix principis‐rup prechtii and the undergrow th biodiversity , the growth of L arix p rincipis‐rup prechtii plantation and diversity of undergrow th vegetation on the differ‐ent slope positions of Weichang Xinfeng Forest Farm were investigated and analyzesed .The result showed that :(1) there was no significant impact of slope positions on the forest stock volume ;(2) The slope had a significant effect on DBH of L arix p rincipis‐rup p rechtii <br> plantations at the 5% significant level ;(3) The slope had an extremely significant impact on the biodiversity of North China Larch plantatiion ,with the evenness index and species diver‐sity indices in the herb layer higher than those in the shrub layer .