species biomass

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；

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。

The species and biomass of phytoplankton was different in the reservoir and overwintering fishponds.

冰封或冰下浮游植物的种类组成、生物量等明显与越冬池冰下浮游植不同。

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；

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 species and biomass succession were mainly changed according to the season alternating.

藻类主要根据季节更替而出现种类季节演替及生物量的季节波动。