Referring to zhu ' s studies , gao says various aspects of climate change could combine to complicate the impact on plant growth , and it is difficult to associate a change in net primary productivity with variation of a single " major " climate factor 在提到朱文泉的研究时，高志强说气候变化的诸多因素都会对植物的生长产生互动的和复杂的影响，依靠这三种“主要”气候因素变化来对植物净初级生产力进行测算还是很难的。
Senior wetland park officer of the agriculture , fisheries and conservation department ( afcd ) mr so ping - man said , " wetlands are cradles of biological diversity and provide the water and primary productivity upon which countless species of plants and animals depend on for survival 渔护署高级湿地公园主任苏炳民说：湿地是生命的摇篮，用以维持生物多样化，它亦为无数依赖湿地的动植物提供水、主要食物和栖息地。
It can provide 48 % of sio3 - si in spring , 35 % of sio3 - si in summer , 83 % of sio3 - si in autumn and 184 % of sio3 - si in winter that required by the primary productivity . but it can only provide 0 . 9 % of po4 - p in spring 春季通过沉积物向海水释放的营养盐能提供维持研究区域内初级生产力所需5103一si的48 % ，夏季可提供35 % ，秋季可提供83 % ，冬季可提供184 % ，沉积物释放的5103一si是维持东海初级生产力所需5103一si的主要来源之一。
The first axis of dca ordination reflects a synthetic environmental gradient , positively correlated with precipitation , humidity , heating , primary productivity , and potential evaporation etc . the second axis of dca represents changes in altitude and longitude Dca排序第一轴表现了一个综合的环境梯度，即从左到右，降水、湿度、热量、初级生产力、潜在蒸发量逐渐增强， dca第二轴反应了海拔和经度的变化，即从上到下，海拔降低、经度增加。
Daoguanhe rerservoir is a typical hill type reservoir in wuhan , china . its area for fish culture is commonly 467ha . periphytic algae and periphytic protozoan including species , the content of chl . a and primary productivity et al , were studied from april 2000 to january 2001 本文从2000年4月至2001年元月按每季度采样一次，对道观河水库按上游、中游、下游设置的三个采样站作了周丛藻类、周丛原生动物的群落结构和渔产潜力的研究，结果表明： 1
The radical reason of lower ecosystem productivity and disharmonic developing in this ecotone is the improper configuration inner animal husbandry for example of ansai county and big animal scale exceeding the threshold of the primary productivity for example of wuchuan county , which above - mentioned leads to the fact that coupling mechanism between agriculture and animal husbandry system has not been established , and agriculture and animal husbandry is still in the state of disharmonic on the whole . 3 主要表现为两种典型结构模式，一种以安塞县为代表，农牧能值总体利用率较高，但畜牧业内部结构偏重食粮动物使得高质能转化率低下；另一种以武川县为代表，农牧业结构总体上朝趋于协调方向发展，但畜牧业规模过大，由于草畜平衡严重失调，导致农牧系统耦合机制难以稳定。
Grey correlation analyses show that at the time axis , the factors influencing the diversity of plants strongly are primary productivity , annual precipitation , relative humidity , mean temperature in january , and potential evaporation etc . the spatial distribution pattern of terrestrial vertebrates including mammals , birds , reptilians and amphibians were studied with methods similar to those for plants . 7 d 通过d以排序表明， d以第一轴与多个环境因子均呈显著相关，其中与经度、年均温、年均降水量、年均相对湿度、潜在蒸发量、初级生产力呈正相关，与纬度、海拔、年均风速、寒冷指数、年均日照率呈负相关。
Modis ( moderate resolution imaging spectroradiometer ) is an important data getting instrument of information onboard the terra and aqua satellites . these data as the substitute of noaa - avhrr data are familiar with people . the data have been mainly used in dynamic monitoring of natural disaster , changes in landscape and vegetation , global net primary productivity , ecological environment , climate changes , and ocean Modis传感器是搭载在terra和aqua卫星上进行全球变化研究的主要信息数据获取设备，其数据作为noaa - avhrr的替代产品正逐渐被人们认识和关注，并已被应用到自然灾害、土地覆盖变化、全球生产力、生态环境、气候变化、海洋等领域的动态监测当中，具有广泛的应用前景。
Meanwhile , we proved that the major factor that determines the distribution of plants in china is the primary productivity . the cold index ( the lowest temperature ) plays a more important role than the highest temperature and the annual mean temperature in restricting the diversity of plants Dcca和cca排序也显示了和dca一致的结果，同时证明，决定中国陆地植物多样性分布格局的环境因素主要是初级生产力，而寒冷指数(即低温)对多样性的限制作用要大于高温和年均温的作用。
The spd model is made by the ins titute of geographical sciences and natural resources research of chinese academy of sciences . it combines social economic factors , such as city and transportation foundational facilities , with nature factors , for example the digital elevation model ( dem ) and net primary productivity ( npp ) of plants to simulate the spatial distribution of population density of china by the advanced grid generation technology 中国模拟人口密度模型是由中国科学院地理科学与资源研究所首先提出的，这个模型试图利用先进的格网生成技术，将城市、交通基础设施等社会经济因子和陆地数字高程( dem ) 、陆地植被净第一性生产力( npp )等自然因子相结合，通过模型的反演，模拟某一时期的中国人口密度空间分布状况。
