摘要
以遗传变异学说和气候相似论为理论依据,对引种地和原产地的气候、土壤条件以及美国山核桃在原产地和引种地的生长结实表现进行了对比分析,得出了在我国纬度25～35°、生长季大于230 d、夏季气温25～35 ℃、昼夜温差小、≤10 ℃天数不低于750 d、降雨量500～1 500 mm、pH值6.0～8.0的河谷冲积土或坡度小于15°的山地砂壤土或粘壤土的广大地区引种栽培可行的结论.
The theoretical basis employed for this study is Genetic Variation by Darwin and Climate Analogy by Mayr. After a careful comparative study of the geo-climate, soil conditions, and growth and performance of the pecan crop between USA the native habitat and China the new habitat, the conclusion is reached that it is feasible to grow pecans in China in those areas within 25-35°N. In these areas, the annual growth season exceeds 230 d, the summer temperatures range 25-35℃ with mild variation between day and night, the annual chilling temperature with the base below 10℃accumulates beyond 750 d, the annual precipitation is 500-1 500 mm, and the soil is dominant by the alluvial type in the flat areas and sandy-loam or sandy-clay at the upland or slopes less than 15°.
出处
《经济林研究》
2005年第4期1-10,共10页
Non-wood Forest Research
基金
国家"948"引种课题"美国山核桃新品种及栽培经营技术引进(96-4-01)"的部分研究内容
湖南省林业厅及教育厅美国山核桃栽培育种课题资助项目
关键词
森林培育
美国山核桃
引种驯化
遗传变异学说
气候相似论
可行性研究
silviculture
Carya illinoensis （Wangenh.） C. Koch
introduction and acclimatization
theory of genetic variation
climate analogy
feasibility study
