Remote sensing method of forest biomass estimation by artificial neural network models

Forest biomass is an important content in forest monitoring.

森林生物量是森林监测中的一项重要内容。

The structure of canopy was reasonable, the distribution shape ofaboveground and below ground biomass liked pyramid.

草层结构合理，地上生物量与地下生物量呈金字塔型分布。

In still water culture, Echinocactus Gruson roots grew well and had a very strong ability of regeneration. Root biomass increment was larger and root average diameter was smaller also.

水培时根系长势良好，具有很强的再生能力，根量增多，根平均直径变小；

Distichum. The relative height growth, relative ground diameter growth and biomass increment decreased with increase of soil salt content and decrease of soil water content.

落羽杉相对高生长、相对地径生长和生物量增量随着土壤盐分浓度的增加和土壤水分含量的减少而减少。

The proportion of biomass increment distributed to root increased with decreasing soil water content, and the proportion allocated to stem and leaf decreased.

4品系生物量增量分配到根系的比例逐渐增大，而分配到茎和叶中的比例则逐渐减少。

The effect of mono-species and poly-species constructed wetlands on wastewater purification and plant biomass increment was studied.

对单种和多种植物人工湿地对污水的净化效果和植物生长生物量进行了研究。

Loss can be minimized. the biomass increment was lower;

将损失降低到最小。总生物量增量减小；

General Contents in 2003 the biomass increment was lower;

2003年总目次总生物量增量减小；

The biomass density, plant density, and plant size of availability plant and bite size were a potential set of variables influencing the functional response of herbivores foraging, and the differences of the variables lead to complicate pattern of functional response.

可利用植物的生物量密度、植物密度、植物大小、以及动物觅食的口量是影响动物觅食功能反应的潜在变量集。这些变量的差异导致动物功能反应格局的复杂化。

The goal of this study was to investigate how laser point data could be explored systematically to measure important growth parameters of wheat such as crop height, degree of coverage, and biomass density in crop yield monitoring.

本文研究的目的是就是探索如何系统性地利用地面LiDAR数据提取株高信息、覆盖度和生物量密度等重要的农田作物生长参数。

( d) bottomland meadow; In the meadow, montane meadow has higher aboveground biomass density than alpine meadow.

草甸类型中，山地草甸（117.4gC·m-2）的地上生物量密度显著高于高寒草甸（58.1gC·m-2）。

The main conclusions were as followed: ( 1) The ecosystem services of buffer strips were related to plant species, crown density and tridimensional green biomass density.

主要研究结论如下：（1）缓冲带的生态服务与物种、郁闭度和三维绿量密度有关。

Cruentum cells grow very slowly in the natural and artificial seawater medium, and the biomass density is also lower.

紫球藻在海水基础培养基中生长缓慢，培养密度低，这就为从其细胞内提取活性物质增加了成本。

Ash has much higher fine root biomass density in the soil than larch at stand level ( with the max value of 4442.3 vs. 2234.9 gm-3).

在林分水平上，水曲柳的根生物量密度高于落叶松（分别为4442.3和2234.9g/m3）。

Biomass density and plant density had an insignificant influence on herbivores intake rate. While plant size had a significant effect on intake rate.

生物量密度和植物密度对动物摄入率无明显影响，而植物大小对动物摄入率则有显著影响。

Submerged plant is an important makeup in Lake Ecosystem. Species, biomass, mulch area, spatial distribution, fashion and degree used of submerged plant are directly related to the environmental quality of the lake.

沉水植物是湖泊生态系统的重要组成部分，湖泊沉水植物的物种组成、生物量、覆盖面积、空间分布、被利用的方式及程度都直接关系到湖泊环境的整体质量。

The results suggest that in order to estimate the confidence interval of the number of species and biomass, a larger sample size ( e.g. n ≥ 50) is needed.

结果说明，要估计一个变量的置信区间，需要有足够大的样本含量。

At herd the grass growth season, 5 kinds of main dominant species forage biomass is 50% that total forage biomass;

牧草生长季5种主要优势种牧草的生物量占总生物量的50%以上；

The result shows that constitute the plants community of the main dominant species forage biomass variety of year range is bigger than community.

结果表明：分种牧草生物量年变化幅度大于牧草群体的变化；

Based on the concepts and species of biomass salt, the characteristics of biomass salt and importance of developing biomass salt were discussed.

文章在介绍生物质盐概念与种类的基础上，论述了生物质盐的特点、开发生物质盐的意义。