系统地论述了林分蓄积量调查的线截抽样原理和方法、并在针叶林和阔叶林中进行了验证。
The principle and method of line intersect sampling for surveying stand volume were introduced in this paper. and tested in coniferous forests and broad-leaved forests.
本文探讨了角规测树法在测算毛竹林分蓄积量、标准株数、林分重量及单位面积株数中的应用。
Moreover, the application of angle-count cruising to calculating the stand volume, standard stock number, stand weight and stock number per unit area, is discussed.
另外,对杉木不同初植密度下林分断面积、蓄积和生物量的生长过程进行了分析和模型拟合。
In addition, the paper analyzed and simulated growth process of stand basal area, volume and biomass under different initial planting density for Cunninghamia lanceolate, plantation.
阔叶林分通过株数递减和蓄积量递增而演变,这种演变过程和转移概率的特征是一致的。
The succession of broad-leaved forest by decreasing tree number and increasing storage was in accordance with the characteristics of transfer probability.
通过模型的外检验,蓄积平均精度可达90%以上,林分纯生长量的估计精度可达80%以上。
Through the model external-test, the average precision of volume model was over 90% and the estimation precision of stand net growth was over 80%.
但蓄积量大幅下降,林分的龄组、密度结构严重失调,林分生长量偏低。
But stand volume descents to a great extent, age class and stand density structure are maladjusted badly, and the number of stand growth is low.
结果表明:采伐强度与林分年平均蓄积生长量和更新株数间呈抛物线关系。
Results showed that the relation equations was parabola equation between cutting intensities and annual average increment and annual average number of regeneration individuals of stands.
凉水溪流河岸带森林立木材积、林分蓄积及溪流倒木数量、平均倒木体积和总倒木蓄积量均高于帽儿山溪流。
The standing tree volume, stand stocking of riparian forest stand, number, average volume and total stock of in-stream LWD at streams in Liangshui were greater than that of Maoershan.
通过对各土类农田防护林林分蓄积生长量和土壤生产力的综合分析,把河西走廊立地级划分为四类。
Site level in Hexi-corridor area was divided into 4 types by comprehensive analyzing the growing stock of stand and soil productivity of all kinds of farmland shelterbelt.
建立在林分的生物量蓄积量线性估计模型可直接应用到区域尺度。
From the theory we can propose that linear estimation model of stand biomass can be directly applied to the regional scale.
结果表明,本文提出的理论方法不仅完善了传统方法而且克服了传统方法测定林分断面积、蓄积量零增长及跳跃现象。
The results show that the methods suggested by author not only improve the traditional method but also eliminate the phenomenon of zero and jumping in the estimation of basal area and volume incr...
结果表明,本文提出的理论方法不仅完善了传统方法而且克服了传统方法测定林分断面积、蓄积量零增长及跳跃现象。
The results show that the methods suggested by author not only improve the traditional method but also eliminate the phenomenon of zero and jumping in the estimation of basal area and volume incr...
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