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科尔沁沙地小叶锦鸡儿更新方式研究 被引量:5

Regeneration Patterns of Caragana Microphyllain Horqin Sandy Land
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摘要 以不同恢复年限的人工和天然小叶锦鸡儿为研究对象,采用样地调查和室内外实验相结合的方法对小叶锦鸡儿的更新方式进行了研究。结果表明,不同年限小叶锦鸡儿结种量和百粒重差异明显;小叶锦鸡儿土壤种子库丰度随时间降低很快;虽然沙埋有助于提高种子萌发率,但野外条件下小叶锦鸡儿幼苗很难存活;平茬处理后小叶锦鸡儿枝条长势良好;小叶锦鸡儿到达一定年限后可通过自然萌生进行更新。说明在自然条件下,小叶锦鸡儿难以实现种子更新;自然萌生和人工平茬是其主要且有效的更新方式。 Caragana microphylla is one of the key species for vegetation restoration in Horqin sandy land. Using field investigation and indoor and outdoor experiments, the regeneration of C. microphylla with dif- ferent ages were studied. The results show that there were obvious differences in seed yield and lO0-seed weight among C. microphylla with different ages. Seed density in soil decreased quickly with time. Seed- lings could hardly survive under natural conditions, although sand burial increased the seed germination rate. The branches grew well after stumping treatment. C. microphylla could regenerate through sprouting after a few years. In summary, it is difficult to implement seed regeneration for C. rnicrophylla under natural con- ditions, and sprouting and artificial stumping are the effective regeneration patterns for C. microphylla in the study area.
出处 《水土保持通报》 CSCD 北大核心 2012年第4期176-179,共4页 Bulletin of Soil and Water Conservation
基金 河南理工大学博士基金项目"气候变化背景下洪涝灾害风险评估与风险管理研究"(B2011-017) 国家"十一五"科技支撑计划项目"内蒙古东部沙地草场风蚀沙化控制技术研究与试验示范"(2006BAD26B04)
关键词 小叶锦鸡儿 更新方式 平茬处理 萌生 Caragana microphylla regeneration patterns stumping treatment sprouting
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