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以萝卜和西南桦为受体植物,研究了马尾松鲜叶、未分解枯落叶、半分解枯落叶和林下表土水浸液的化感作用,旨在为马尾松残次林改造中树种选择提供科学依据。结果表明:马尾松林下表土水浸液4个浓度处理间萝卜胚根生长存在显著差异,≤1∶40浓度水浸液对萝卜芽苗生长起促进作用,1∶10浓度水浸液则显著抑制萝卜芽苗生长;鲜叶和未分解枯落叶水浸液对西南桦芽苗生长影响显著(P<0.05),而半分解枯落叶和林下表土对西南桦芽苗生长影响不显著。马尾松的化感作用并不强烈,在选择其林下套种乡土阔叶树种时,化感作用并不是一个关键因素。
The radish and southwest birch as acceptor plants, the study of the masson pine fresh leaves, undivided litter, semi-decomposed litter and submerged topsoil water immersion allelopathic effect, aimed at the regeneration of Masson pine secondary forest tree species selection Provide a scientific basis. The results showed that there were significant differences in the radish radicle growth between the four concentrations of surface water of subsoiling Pinus massoniana forest. The water with the concentration of 1:40 could promote the growth of radish sprouts. The 1:10 concentration of water immersion significantly inhibited The radish sprouts grew well. The effects of fresh leaves and undivided litter aqueous extracts on the growth of Betula alnoides seedlings were significant (P <0.05). However, the effects of semi-decomposed litter and topsoil on the growth of Betula alnoides seedlings were not significant. The allelopathic effect of Pinus massoniana is not so strong. Allelopathy is not a key factor in the selection of native broad-leaved species in the understory.