山羊对各种植物的选择性指数随放牧季节和放牧率的不同而发生变化。
The selectivity index of different plant species changes with grazing The selectivity index of different plant species changes with grazing seasons and stocking rate.
介绍分析了各种植被指数，利用非线性比自动提取植被信息。
Then the paper introduces vegetation indexes and extracts automatically the vegetation information through non-linear ratio.
沙区产业结构单一，种植业多样化指数在1.5—1.8之间；
Simple production structure with planting diversity index from 1.5 to 1.8;
同时利用五月低温强度指数，结合湖南早稻种植实际情况，定量评估了基于早稻种植现状的五月低温的生产风险。
Considering the current status of early rice cultivation in Hunan, meteorological risk of chilling in May was quantitatively evaluated by using its intensity index.
结果表明，边际效应指数可作为选择耐密马铃薯品种和确定马铃薯品种种植密度的指标。
The results showed that the marginal effect index could be used as a choice for tolerant dense planting potato breed and as a parameter of potato plant density.
结果表明，边际效应指数可作为选择耐密马铃薯品种和确定马铃薯品种种植密度的指标。
The results showed that the marginal effect index could be used as a choice for tolerant dense planting potato breed and as a parameter of potato plant density.
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