青海云杉(Picea crassifolia)边材心材边界的确定及树干传输水分的空间格局

利用染色法和SF-300树干液流仪分别区分了青海云杉树木的边材与心材的边界, 并用树干液流法研究了青海云杉树干传输水分的空间格局.结果表明: 染色法与树干液流法均能有效区分青海云杉树木的边材与心材, 但染色法更方便、 快捷; 利用染色法测定的青海云杉树木边材宽度与其胸径大小呈指数函数关系.青海云杉树干液流速率从边材外缘向里逐渐增大, 达到最大值后又逐渐减小, 其水分传输格局基本呈对称分布的.

Sapwood/Heartwood Boundary Determine and Spatial Pattern of Trunk Liquid Transfer of the Picea crassifolia

The sapwood/heartwood boundary of the Picea crassifolia in the upper reaches of the Heihe River was determined with staining method and Heat Pulse Meter SF-300 made in Australia, respectively, and the spatial pattern of the trunk liquid transfer of the Picea crassifolia was studied by Heat Pulse Meter SF-300. It is found that both the staining method and the trunk flow method are able to determine the sapwood/heartwood boundary of the Picea crassifolia trunk. However, the staining method is more convenient and more rapid. There is an exponential relationship between diameter at breast height and sapwood width determined by the staining method. The trunk liquid transfer velocity of the Picea crassifolia gradually increases from the outer edge of sapwood inwards to a maximum and then decreases smoothly. The spatial pattern of the trunk liquid transfer of the Picea crassifolia is symmetric distribution in the main.