净生产量

枫香人工林净生产量动态变化研究

Studies on the Dynamic Change of the Net Production Quantity of Liquidambar formosana Plantation

四川西北部亚高山云杉天然林生态系统碳密度、净生产量和碳贮量的初步研究

Preliminary study of carbon density , net production and carbon stock in Natural Spruce Forests of Northwest subalpine sichuan , china

通过对香港草地、芒萁、灌木群落植物生物量和净生产量的研究，探讨这些植物群落的C素动态。

Carbon dynamics of the grass , fern and shrub communities in Hong Kong were studied based on the estimation of their biomass and net primary production ( NPP ) .

其中乔木层平均生物量为149.560t/ha，净生产量为9.627t/ha·a。

The total mean biomass and net production of tree layers was 149.560t/ha and 9.627t / ha · a.

1～25a内生物量增长迅速，年平均净生产量随年龄的增加而增大，25a后生物量增长相对较慢，进入生长的平稳期。

The biomass of the plantation increased rapidly between 1 and 25 years and annual average net primary productivity increased with the age of the trees , but the growth slowed down after 25 years .

细根年净生产量20～1317g·m-2·a-1，占林分总净初级生产量的3%～84%，大部分在10%～60%；

Annual fine-root net primary production ( NPP ) was 20 ~ 1317 g · m - 2 · a - 1 , amounting to 3 % ~ 84 % of total stand NPP , mostly 10 % ~ 60 % .

同时还研究了林分平均净生产量和产量结构。

The structure of output and productive forces have been examined .

9年生萌生林乔木层地上部分生物量为54.826t/ha，年平均净生产量为10.229t/ha。

The above-ground biomass of arbor layer amounted to 54.826 t / ha , and mean annual production amounted to 10.229t/ha .

龙须草栽植成活率的研究矮嵩草草甸年净生产量对气象条件响应的判别分析

Study on Survival Ratio of the Planting of Chinese Alpine Rush Discriminant Analysis of Annual net Production in Alpine Meadow to Meteorological Condition

林木仍然处于继续生长阶段，各类型林分净生产量组成和林木层各组份净生产量的分配，都表现为基本一致的规律。

The law of net productivity composition in various stand types is basically identical with that of net productivity distribution in various forest tree organs .

在地下0~40cm土层内，其根系的年净生产量及周转值分别为787.13g/m2、26.08%；

At the layer of 0 ~ 40 cm , net production and turnover value of roots were 787.13 g / m ~ ( 2 ) .

游牧部落是从事短链生产，在有利的生态条件下，净生产量大，发展快，但由于结构简单，产出单一，抗生态环境波动干扰能力差。

Under adventitial condition , net yield was great , development was fast , but , because of simple structure , output was of singularity , and environmental fluctuation could overwhelm this short chain product .

分析了木榄的平均和连年净生产量的年动态变化以及净同化率随年龄的变化趋势。为合理经营和利用木榄林提供依据。

In order to provide a theoretical basis for mangroves management and utilization , the yearly dynamic variation of the mean and annual net production and the variation tendency of the net assimilation rate with the increasing of the stand age have been analysed .

树线地带落叶松混交林和岳桦林的净生产量也出现急剧降低，但根系生产量比例则较低海拔同类林分高，有利于对土壤中水分和养分的吸收。

Net primary productivities of larch mixed forest and birch forest decreased sharply at treeline in comparison with lower altitudinal stands , whilst the ratio of root production was much higher than that of lower altitude . This made it profitable to take water and nutrients in soil .

对广西中部丘陵区不同年龄阶段（8年生、14年生、23年生、38年生）的马尾松人工林生物量和净生产量进行了研究，探讨了该人工林生产与碳素动态。

Carbon dynamics of Masson pine plantation in different age classes ( 8 a , 14 a , 23 a , 38 a ) in the central hilly area of Guangxi , China was studied based on the estimation of their biomass and net primary production ( NPP ) .

1981&2000年内蒙古中部地区植被净初级生产量变化研究

Study on Net Primary Production Variations in the Central Part of Inner-Mongolia during 1981-2000

西双版纳热带次生林净初级生产量的初步研究

A preliminary study on the net primary production of the secondary tropical forest in Xishuangbanna

连续放牧群落净初级生产量高于禁牧群落，为超补偿生长。

The primary production under CG is higher than the FG and appeared as over-compensatory growth .

对地上部分净初级生产量和植物种子的消费率分别为5.65%和68.14%；

Consumption efficiency on the total aboveground net primary production and plant seeds was 5.56 % and 68.14 % respectively .

根据Holdridge模型模拟、NPP估算、AVHRR／NDVI计算和土地覆盖变化等相关研究可知，这种干湿变化还未对植被分布产生质的影响，但可以影响植被覆盖度和净第一性生产量。

Based on the simulation by Holdridge model , the calculation of NPP and AVHRR / NDVI , along with the research of land use and cover change , this kind of change can affect the net primary productivity and vegetation coverage without much change in vegetation distribution .

它在顶极植被净第一性生产量与实际蒸发量之间有一个有效的对数关系。

It has an effective , logarithmic relationship between net primary production of climax vegetation and evapotranspiration .