1) vegetation activity
植被活动
1.
In the present study, using normalized difference vegetati on index (NDVI) as an indicator of vegetation activity, seasonal trends of vegetation activity and their dynamic responses to climate changes in China were explored based on remotely sensed data (NOAA-AVHRR) from 1 982 to 1999.
利用NOAA-AVHRR数据,以归一化植被指数(NDVI)作为植被活动的指标,研究中国1982~1999年四季植被活动的变化,探讨植被活动对全球变化的主要响应方式。
2) vegetation dynamics
植被动态
1.
We improved a previously developed regional model of vegetation dynamics to include biogeochemical cycling of nitrogen.
本文对现有的区域植被动态模型进行了改进，改进后的模型包含了生态系统中生物量动态、植被结构动态、氮素循环过程三者之间的耦合，以及植被和土壤的相互作用。
2.
In order to study the grassland vegetation dynamics and its main influencing factors as well as to supply technique and theory for vegetation dynamics monitoring,Yanchi County,Ningxia Hui Autonomous Region in the Farming-Pastoral Ecotones in the north of China were selected as the study objects.
为研究农牧交错带草地植被动态及其主要影响因子,为草地植被动态监测提供技术、理论支撑,本文选取地处农牧交错带的宁夏盐池为研究区域。
3.
Based on study reports and publications,the development of vegetation dynamics is summarized,and previous study of vegetation dynamics in transitional zone of pastures and farmlands in North China is reviewed.
通过回顾植被动态研究的历史,简要概述了植被动态的发展。
3) grassland vegetation fluctuation
植被波动
4) dynamic vegetation
动态植被
6) planting activities
种植活动
1.
Because children’s activities can not be separated from social factors and interactions, we try to use the social constructivism theory to guide children\'s planting activities,.
植物正是儿童身边感兴趣的事物,植物的种植活动也是儿童科学活动的一部分,遂本人进行了儿童种植活动的系列实验。
补充资料：草甸植被
| 草甸植被 meadow vegetation 以多年生中生草本植物为主体，发育于中度湿润条件下的植被类型。常称为草甸。草甸植被草层高而茂密，种类较丰富，主要有禾本科、莎草科、蔷薇科、菊科、豆科及蓼科等植物。一年生植物、小半灌木和灌木处于从属地位。根据分布地形部位可分为河漫滩草甸和大陆草甸，后者还可分为旱地草甸、低地草甸、山地草甸、亚高山草甸和高山草甸。按植物群落性质可分为典型草甸、高寒草甸、沼泽化草甸和盐生草甸等。草甸一般不构成独立的地带，属隐域性植被或跨带植被，但高山草甸和亚高山草甸可组成植被垂直带。中国的河漫滩草甸及大陆草甸大多已被开垦，在青藏高原东部及北方温带地区的山地和边远的低平原、海滨也有大片分布。草甸植被由于水分适中、土壤肥沃，历来是人类开垦的对象。
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参考词条