闽东地区不同海拔浙江红花油茶林全伐改造效果比较

【目的】比较全伐措施对于不同海拔浙江红花油茶林的改造效果,提高其产量和经济效益。【方法】以天然籽播浙江红花油茶林为研究对象,通过逐步伐除全部上层木(全伐)措施对寿宁县白鹇墓试验地和霞浦县八斗丘试验地进行改造,调查改造前后林木生长、结实状况的变化,及环境因子的变化。【结果】与八斗丘试验地相比,改造后白鹇墓试验地的浙江红花油茶叶片N和K含量增长量较大,而P含量增长较小。白鹇墓试验地和八斗丘试验地空气湿度分别降低了4.6%和7.0%。白鹇墓试验地光照强度日变化是八斗丘试验地的1.47倍。白鹇墓试验地果形指数、鲜出籽率、出仁率、种仁含油率的增长量均较大,分别是八斗丘试验地增长量的6.75、2.17、3.33、1.56倍。八斗丘试验地土壤温度增长量是白鹇墓试验地的1.18倍,空气湿度的降幅是白鹇墓试验地的1.5倍,土壤N、P、K含量分别增加了7.85、20.44、57.12 mg/kg,均较高,冠幅生长量是白鹇墓试验地的1.12倍。八斗丘试验地的单株结果量、果实产量、产油量的增长量分别是白鹇墓试验地各指标增长量的1.65、1.67、1.22倍。应用模糊数学隶属函数法对改造效果进行综合评价,八斗丘、白鹇墓试验地平均隶属函数值分别为0.79和0.65,说明八斗丘试验地改造效果优于白鹇墓试验地。【结论】浙江红花油茶更适合生长在海拔700 m的八斗丘试验地,说明其适生地既要有适当的海拔高度,又要有较高温度和光照条件。

Comparison of unforost transformation effects of Camella chekiangoleosa forests at different elevations in eastern Fujian

【Objective】Transformation effects of unforost on Camella chekiangoleosa forests at different elevations were compared,in order to improve its yield and economic benefit.【Method】Using natural seed-sowing C.chekiangoleosa forests as research objects,Silver Pheasant Tomb test site of Shouning county and Badouqiu test site of Xiapu county were transformed by removing all upper layers of wood step by step.Before and after transforming,variations of forest growth,bearing status,and environmental factors were investigated.【Result】After transforming,compared with Badouqiu test site,N and K contents in C.chekiangoleosa leaf have greater increments and P content has a smaller increment in Silver Pheasant Tomb test site.In Silver Pheasant Tomb and Badouqiu test sites,air humidity are reduced by 4.6%and 7%,respectively.Diurnal variation of light intensity in Silver Pheasant Tomb test site is 1.47 times that in Badouqiu test site.Fruit shape index,fresh seed rate,kernel rate,oil content in seed have higher increments,respectively 6.75,2.17,3.33,1.56 times those in Badouqiu test site.Increase of soil temperature in Badouqiu test site is 1.18 times that of Silver Pheasant Tomb test site,and decrease of air humidity is 1.5 times that of the latter.Contents of N,P and K in soil are increased by 7.85,20.44 and 57.12 mg/kg,respectively,and all of them are higher.Increment of crown width is 1.12 times that of Silver Pheasant Tomb test site.Increments of fruit number per plant,fruit yield and oil yield in Badouqiu test site are 1.65,1.67 and 1.22 times of those in Silver Pheasant Tomb test site,respectively.Transformation effect is comprehensively evaluated by using fuzzy mathematical membership function method,and average membership function values of Badouqiu and Silver Pheasant Tomb test sites are 0.79 and 0.65.So transformation effect in Badouqiu test site is better than that in Silver Pheasant Tomb test site.【Conclusion】C.chekiangoleosa is more suitable for growing in Badouqiu test site at an altitude of 700 m,indicating that suitable land should have both appropriate altitude and higher temperature and light conditions.