园林绿化华木莲的生长动态及环境影响研究  

Relationship Between Growth and Environmental Factors of Sinomanglietia glauca Planted for Landscaping

作　　者：施建敏[1] 裘利洪[1] 俞志雄[1] 

机构地区：[1]江西农业大学林学院,江西南昌330045

出　　处：《江西农业大学学报》2013年第3期444-450,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金资助项目(30060073);中央财政林业科技推广示范项目(JXTG-07)

摘　　要：华木莲是具有较高观赏价值的珍稀濒危树种,其长势直接影响绿化效果。为掌握华木莲生长与环境的关系,使其更好地在园林中推广应用,对同年栽植的同规格华木莲绿化苗的生长动态和环境因子进行了观测和分析,结果表明:华木莲在春季和夏季生长均旺盛,但夏季的生长分化大,在秋季和冬季基本停止生长。不同生境的华木莲胸径差异显著,小区生境的平均胸径(7.93±1.62)cm是公园生境(4.87±1.12)cm的1.63倍。光照状况和土壤电导率决定华木莲的短期和长期生长,但是决定华木莲生长的环境因子具有尺度效应,它因不同生境类型和时间而异:小区生境决定短期生长的是光照状况,而决定长期生长的是光照状况和水分异质性;公园生境决定短期生长的是光照状况和土壤温度,而决定长期生长的是光照状况。总体而言,华木莲适宜生长在向阳、凉爽、湿润的生境,作园林绿化树种应用时宜用大径苗木,而且移栽后应针对不同生境类型采取相应的养护措施。Sinomanglietia glauca,a first-grade state protection plant,is a beautiful landscaping tree.Because of its strict environmental requirement,S.glauca only suits to be planted in the habitats such as residential district and park.To apply S.glauca for urban landscaping,it is important to understand the relationship between its growth and environmental factors.In this study,the growth dynamic of 41 individuals,which were planted in 2006,the seedings were of the same size,was regularly measured as well as the environmental factors.The results showed that S.glauca nearly ceased to grow in autumn and winter,and grew fast in spring and summer,but the growth differentiation between small diameter individuals and large diameter individuals was enlarged in summer than that in spring.By March 2012,the DBH of S.glauca in the residential district habitat（7.93±1.62） cm was significantly bigger than that in the park habitat（4.87±1.12） cm.The light condition and soil electrical conductivity were the two factors which controlled the short-term and long-term growth of S.glauca.Howerver,the determinants of growth varied with space scale and time scale：in the residential district habitat,the determinants of the short-term and long-term growth were light condition,and light condition and soil water heterogenity;in park hatbitat,the determinants to the short-term and long-term growth were light condition and soil temperature,and light condition.Generally,the sunny,cool and mosit sites should be selected and big size seedlings be used whenS.glauca is used as landscaping tree in urban areas.As the determinants of growth varied with habitat types,the management measures should be taken in line with corresponding habitats.Key words： light;soil water content;soil nutrient;adaptability;stepwise regression;path analysis;scale effect

关 键 词：光照 土壤含水率 土壤养分 适应性 逐步回归 通径分析 尺度效应 

分 类 号：S792.99[农业科学—林木遗传育种]