【摘要】 江苏省北部平原是杉木新的栽培试验区,阜宁县河堤上种植杉林1200多亩,生长表现良好。其特点:1.生长周期明显,第4—11年为速生阶段。季节生长节律以6—9月为速生期。相关分析结果表明,气温、相对湿度及降雨量与杉木生长关系密切,均可接受相关估计。昼夜生长节律中高生长在夜间进行,白天停止;2.杉木只能在可溶性盐含量<0.05%的土壤上正常生长;3.杉木可以在 pH8.0—9.0的碱性土上生长;4.间伐试验在小气候与生长量上的效应,以150株/亩林分效果最为显著。更多还原

【Abstract】 The growth natures and ecological characteristics of Cunninghamia lan- ceolata are summarized as follows:1.In the growth rhythm:a.The rapid growth stage appears from 4th year to 11th year.b.A fast growth season is significant from June to Septamber.On the basis of ecotype of Cunninghamia lanceolata,the correlative ana- lysis has been applied.The growth of the standing forest expresses an obvious correla- tion with temperature,relative humidity and precipitation,c.The growth in height pro- ceeds at night and stops at day.2.The growth is not affected,when the salt content of the soil is<0.05%.While the growth is evidently restrained by salt,when the salt content of the soil reaches 0.1%.3.Cunninghamia lanceolata is a tree species with great adaptability to soil acidity.It can grow in the soil with pit 4—9.4.The thinning ex- periment has shown that the suitable stand density is 150 trees/mu.更多还原