Removing too much biomass would eventually cause declines in forest productivity.
带走更多的生物质最终将使森林的生产率下降。
So the matched measures were put in practice in favor of enhancement of forest productivity and forest management level.
其配套措施的实施，有利于林地生产力的提高，也将提高森林经理工作水平。
As the primary producer of forest ecosystems the forest productivity reflects the structure and function of plant community synthetically.
森林生产力是森林生态系统中作为第一性生产者植物群落结构与功能的综合体现。
Genetic improvement is also a means to improve forest productivity, for example to ensure a high wood production in intensively managed forests.
基因改良亦是提高森林生产力的一种手段，例如确保集约管理的森林提供高木材产量。
Different degrees of soil compaction were caused by frequently human activities in urban forest in recent years, and thus affected forest productivity and soil carbon balance.
近年来城市森林人为活动频繁，对林地土壤造成不同程度的压实，从而影响林分生产力及森林土壤碳平衡。
Long-term effects are primarily mediated by changes in tree species composition and the consequent alterations of forest structure, productivity, and nutrient uptake.
长期影响主要是由树种组成的变化以及随之而来的森林结构、生产力和养分吸收的变化所导致的。
Forest system productivity is essential feature of forest ecology system.
林业系统生产力是林业生态系统最本质的特征之一。
Precipitation is a key determinant of plant productivity in forest, whilst in arid regions there is an approximately liner increase in primary productivity with increasing precipitation.
降雨量是森林植物生产量的关键决定因子，而在干旱地区，初级生产量随降雨量的增加大致是一个线性增长。
Demand for food in these countries will also double, which, at their current low levels of agricultural productivity, will drive up demand for forest land.
这些国家对于食物的需求也将随之翻番。鉴于她们当前较低的农业生产水平，激增的粮食需求会进一步推动向森林要地的冲动。
Comparatively intact forest layer, the clear layer of the arbores, thicket and vert. (5) Obvious continuity of vegetation community's distribution and poor productivity of community.
森林层次结构较为完整，乔、灌、草各层次间分化清晰：(5)植物群落分布的连续性明显及群落生产力水平低等群落特征。
The sensitivity analysis of primary factors affecting the forest Net primary Productivity (NPP) is important to estimate NPP accurately.
对影响森林植被净第一性生产力的主要因子进行敏感性分析是准确估计NPP的需要。
Simulated the impacts of global climate change on the biomass, productivity, and carbon sink capacity of Chinese boreal forest based on the predicted results of global change.
结合全球变化的预测结果，模拟了全球气候变化下中国北方林生物量、生产力以及碳吸收能力的变化；
The effect of protection forest for pasture on grass quality and grassland productivity is the key for estimating its function.
草牧场防护林对牧草质量和草场生产力的影响是评价草牧场防护林效益的关键。
Dividing the forest site type, comprehensive appraisal the quality of forest land are the bases to match species with the site, scientifically mange and afforest and predict productivity.
划分森林立地类型，综合评价林地质量，是适地适树，科学地进行营造林和预测森林生产力的基础。
Soil organic matter is a very important part of forest ecosystem productivity, and is also a very important tache of biological cycling in forest ecosystem.
土壤有机质为森林生态系统生产力构成的重要部分，是森林生态系统生物循环中的重要环节之一。
Irrational land use and forest cutting have resulted in the serious degradation, the decrease of land productivity and the water and soil erosion in the fragile soil system and forest system.
不合理的土地利用方式和对森林的不合理砍伐导致脆弱的土壤系统和森林生态系统的严重退化、生产力下降和严重的水土流失。
There are large areas low-quality forest with low canopy density, low productivity because of over-harvesting operations and natural disasters.
由于多次过量采伐干扰及自然灾害，小兴安岭林区形成大面积郁闭度较低、生产力低下且林相衰败的低质林。
The effects of thinning on forest growth embodied some aspects which mostly include the effects on stand productivity, stand factors, stand biomass, vegetation and shrubs under-forest, soil and so on.
抚育间伐对森林生长的影响体现在很多方面，包括对林分生产力及其林分因子、林下植被及灌木、林下土壤和天然更新影响等方面。
Afforestation by water-harvesting improves the soil water environment in forest owing to increase of runoff volume collected in the planting strip, so that the productivity of forests is influenced.
集水造林通过增加植树带汇流量改善了林地土壤水分环境，从而影响到林分物质生产水平。
This paper concerns the rational selection type of secondary logging in Heilongjiang forest area by productivity and productive cost.
这篇文章通过生产率和生产成本讨论了黑龙江林区二次集材选型问题。
Setting the long-term strategy of improving and maintaining the land productivity, adjusting the forest composition and structure so as to improve the forest quality in Beijing.
同时还应把维护和提高地力、调整森林的组成和结构作为提高森林质量的一项长期策略；
This paper gives the purposes and necessity of estimation of forest system productivity;
为此提出了对林业系统生产力量化的必要性、目的和意义；
Under same growth conditions, there would be relative higher volume and productivity in coppice forest than in seedling crop of Robinia pseudoacacia.
与实生林相比，在相同的生长条件下，萌生林具有较高的木材量和生产力。
This paper treats of the causes of site productivity decline of artificial forest, including planting methods, climate, soil, population structure, species and the proper measures.
本文从育林措施、气候、土壤、人工林群落结构、树种等方面概述了引起地力衰退的主要因素和应对策略。
The law of net productivity composition in various stand types is basically identical with that of net productivity distribution in various forest tree organs.
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。
Tree crown form and canopy structure of the tussah-feeding oak forest are important influencing the photo-productivity of the stands.
柞蚕场的树冠类型和冠层结构是影响蚕场光合生产力的主要因素之一。
Tree crown form and canopy structure of the tussah-feeding oak forest are important influencing the photo-productivity of the stands.
柞蚕场的树冠类型和冠层结构是影响蚕场光合生产力的主要因素之一。
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