论文部分内容阅读
森林资源调查的主要任务是查清森林面积和蓄积.目前我省是利用1:1万地形图实地勾绘各种林分类型的小班,求得各类土地面积;采用角规测树的方法查清森林蓄积.但从已开展调查规划工作的林场来看,在小班勾绘和角规测树方面,尚存在一些问题.因此,本文拟就如何提高小班勾绘和角规测树的工作质量问题,谈一些粗浅的体会,提供参考.确保小班区划勾绘准确可靠应掌握的要点1.要严格按照区划小班的条件划分小班按照《江苏省国营林场调查规划技术规程》规定,凡林权、地类、林种、树种、起源、龄组、疏密度、经营目的、立地条件、有无林下造林等条件的不同,应区划为不同类型的小班.而在实际工作中,存在不少错划、漏化的问题,我们分析主要原因就是没有按照区划小班的条件进行造成的.如有的把每亩蓄积7.5和5.5或5.4和3.5立方米的林分划为一个小班;有的把疏密度0.8与0.5的划为一个小班;有的把杉木纯林与松杉混交的划为一个小班,这样调查出来的数据是很难反映资源的现状的.因此,要使区划勾绘
The main task of forest resources survey is to ascertain the forest area and accumulation of At present, our province is the use of 1: 1 000 topographic maps on the spot to draw a variety of forest types of small classes, obtained various types of land area; However, according to the forest farms that have carried out survey and planning, there are still some problems in the small scale drawing and angle measurement tree.Therefore, this paper intends to improve the work of small scale drawing and angle measurement tree Quality problems, to talk about some superficial experience, to provide reference to ensure that the classification of small classes accurate and reliable points to be mastered 1. To be in strict accordance with the conditions of the division of small classes in small classes According to “Jiangsu Province State Forestry Investigation and Planning Technical Regulations” Different types of small classes should be zoned for different types of land use, land types, forest types, tree species, origins, age groups, sparseness of density, business purposes, site conditions, with or without undergrowth afforestation, etc. In practice, there are many The main reason for our analysis is that we did not do so according to the conditions of zoning small classes.If we divide the forest with 7.5 and 5.5 or 5.4 or 3.5 cubic meters per acre into one small class, The coarseness of 0.8 and 0.5 classified as a small class;. Some of them fir plantations and mixed conifers classified as a small class, so the investigation out of the data is difficult to reflect the current resources and therefore, to make zoning hook painted