他感作用及其林学意义与思考

在全面介绍他感作用研究历史、概念和研究现状的基础上,分析认为苗圃育苗失败、边行优势、小老树、散生树种、林网胁地、干旱半干旱地区造林成活率保存率双低等常见林学问题,都是他感作用的结果,或其重要因素之一。结合相关论述,提供铅笔柏受群众杨他感抑制的一则实例,提出挥发性他感物质改变茎尖向性生长可能是一种他感作用形式,以及植物吐水作为他感物质释放的可能途径。从植物次生代谢和进化角度进一步阐释他感作用,结合植物生物学特点,分析认为他感作用是植物的攻击性防御手段,其效能强度依次为抑制竞争者种子萌发、根尖生长、茎尖生长、侧芽萌发、全株生长和种子生产。

Thinking and Forestry Meaning on the Allelopathy

This paper introduced the research history, concept and research status of allelopathy, and analyzed the reason of nursery seedling failure, interplant peanut, small-aged trees, species of scattered wood, shelterbelt nets,low survival rate on semi-arid region, thought allelopathy is a major factor. Put forward an example that the allelopathy of Populus popularis on Sabina virginiana. The reason showed： volatile substances change stem tip to growth is likely to be a form of allelopathy and plant spit water is possible ways of allelopathy release. The article interpreted the allelopathy with plant secondary metabolism and evolution, thought that allelopathy is an aggressive defense for plant,inhibition of seed germination, growth of root and competitors stem tip, germination of lateral bud, whole plant growth and seed production in the order of efficiency of the intensity.