论文部分内容阅读
森林生态系统的初级生产率是绿色叶片进行光合作用的结果。初级生产率的高低和叶面积的大小密切相关。因此,在森林生态系统中叶面积的测定就显得非常重要。由于杉木叶小量多,通常是根据标准枝上抽取的平均叶面积样品来估测全树叶面积。平均样品叶面积难以实测。朱守谦等于1979年介绍过用叶面积与叶长或叶干重进行回归估测,并建立了叶长-叶面积和叶干重-叶面积两个回归方程,经实测检验,精度在90%左右。然而,用这两种方法估测杉木叶面积都需将针叶与枝条分开,工作量仍然较大,而且不能在活
The primary productivity of forest ecosystems is the result of green leaf photosynthesis. The level of primary productivity is closely related to the size of the leaf area. Therefore, the determination of leaf area in forest ecosystems is of great importance. Due to the small amount of fir leaves, the total leaf area is usually estimated from the average leaf area sample taken on standard shoots. The average sample leaf area is hard to measure. Zhu Shouqian was equal to 1979 introduced by the leaf area and leaf length or leaf dry weight regression estimation, and the establishment of the leaf length - leaf area and leaf dry weight - leaf area regression equation, the measured test, the accuracy of about 90% . However, the use of these two methods to estimate the area of fir leaves need to separate the needles and branches, the workload is still large, and can not live