林木生长量是衡量林分生产力的重要标志,它与土壤肥力密切相关。土壤微生物数量和土壤酶活性与土壤养分组成及其转化有直接关系,是土壤肥力的主要指标之一[1]。河南省位于黄泛平原,是杨树(Poplusspp.)栽培中心区。近年来,由于连栽等经营措施不当,又无力施肥,不少地方杨树人工林地力退化,土壤肥力下降,严重影响杨树人工林生产力持续发展。研究表明,杨树与豆科(Lezumlnosae)植物混交或与其它乔灌树种轮作,是提高土壤肥力,促进林木生长的重要经营措施。杨树作为短周期(7～10 a)纸浆材用材林,在生长过程中,分段系统研究其不同栽培模式生长量、土壤微生物数量及酶活性变化规律,为杨树人工林生长制定分段经营措施提供科学依据,目前这方面研究国内外未见报道。

In order to study 5 cultivation models such as arbor-shrub, arbor-shrub-herb and their disposition for vegetation recovery, 10 arbor species, 7 shrub species and 5 herb species suitalde for locat sites were choiced at waste heap platform of Fushun Coal Mine. The experiment adopted the randomized block design, three replicates, with 0.067 hm2 at each thinned plot.