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作 者 ：孙翠玲 朱占学 王珍 佟超然

期 刊 ：林业科学 1995年 31卷 6期 页码：506-512

关键词：杨树；地力衰退；混交林；

Keywords:Poplar, Soil degadation, Mixed forest,

摘 要 ：在山东,辽宁,河南,河北,北京等五个杨树(Populus L.)栽培地区,抽样调查48块样地,并进行土壤养分化学分析,研究了杨树同代纯林,一代林、二代林生长对林地土壤肥力的影响以及杨树与刺槐(Robinia pseudoacacia L.)、沙棘(Hippophae rhamnoides L.)、紫穗槐(Amorpha fruticosa L.)、混交对土壤营养元素含量,土壤微生物数量,土壤酶活性等方面的影响。研究表明,在相同立地条件下,杨树同代林,随林木生长,土壤养分含量有下降趋势;连栽二代纯林比一代纯林,土壤养分含量及林木生长量有明显下降趋势;杨树与刺槐、紫穗槐、沙棘混交,能够提高土壤肥力,促进林木生长,是维护与提高土壤肥力,防治杨树人工林地力退化的有效生物措施。

Abstract:The effect of the same crop, the first crop and the second crop of poplar forest, and the poplar mixed forest with Robinia pseudoacacia L., Hippophae rhamnoides L. and Amorpha fruticosa L. on the soil nutrients, the soil micorbes and the activities of soil enzyme were studied with the data from 48 sample plots in Shandong Province, Liaoning Province, Henan Province, Hebei Province and Beijing. The results showed that (1) the soil nutrients of the same crop forests tended to be reducing with the growth of the forest in the same condition of the site. (2) the soil nutrients and the growth of the second crop forest were evidently reduced compared with those of the first crop forest. (3) the poplar mixed forest could increase the soil fertility, which was an effective way to provent soil degadation.

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