伐桩高度对樟树及不同种源萌发特性的影响

Effect of stump height on germination characteristics of Cinnamomum camphora and different provenances

为樟树的矮林作业提供技术支持,以福建南平、湖南长沙、江西安福、湖北黄冈、广东汕头和日本大阪6个种源地樟树为材料,研究伐桩高度(30cm,20cm,15cm,10cm和5cm)对樟树及不同种源萌芽特性和生长的影响。结果表明,伐桩高度对樟树矮林的萌芽、成枝数、地径、株高、冠幅和单株鲜重有显著影响,伐桩高度为20cm是樟树矮林营造的适宜高度,各种源樟树矮林萌芽数和成枝数最多,地径、树高、冠幅生长最好,单株鲜重最大。各生长指标相关性分析表明,大多数两两间呈现显著相关或极显著相关,各生长指标间关系密切。不同种源樟树矮林萌芽能力、成枝能力、地径、株高、冠幅和单株鲜重也有显著差异。由隶属函数综合评价得出6个种源樟树矮林生长差异性,来自湖南长沙种源均值最大(0.8708),生长最好,其次是湖北黄冈(0.7302)和日本大阪(0.7121),均值较小的是福建南平(0.1599)和江西安福(0.2882)。

To provide technical support for the coppicing of Cinnamomum camphora,C.camphora from six provenances,namely,Nanping in Fujian,Changsha in Hunan,Anfu in Jiangxi,Huanggang in Hubei,Shantou in Guangdong and Osaka in Japan were used as materials to study the effect of stump height(30 cm,20 cm,15 cm,10 cm and 5 cm)on the growth of C.camphora.The results show that when the height of stump is 20cm,which was suitable for application in the construction of the coppicing of C.camphora,the number of buds and branches of C.camphora was the most,the ground diameter,plant height and crown diameter growth was the best,and the fresh weight per plant was the largest.Complicated relationship was observed in growth index of C.camphora,the correlation coefficient between every two index mostly reached significant or extremely significant level.It indicates that the growth index of C.camphora was closely related.There are significant differences in the number of buds and branches,ground diameter,plant height,crown and fresh weight per plant of C.camphora from different provenances.The growth of C.camphora from six provenances was evaluated by membership function method.The results show that the average value from Changsha,Hunan provenance was the highest(0.8708),the growth was the best,followed by Huanggang,Hubei provenance(0.7302)and Osaka,Japan provenance(0.7121),the average value from Nanping,Fujian provenance(0.1599)and Anfu,Jiangxi provenance(0.2882)was the least,and the growth was the worst.