1)productivity[英][,pr?d?k't?v?ti][美]['prɑd?k't?v?t?]林地生产力
1.The results show that: The growth of poplar trees and the plantations productivity were more increased on SDI than on normal irrigation (NI).本文研究了北京沿河沙地地下滴灌条件下杨树人工林树木速生丰产机制，并对地下滴灌优化灌溉制度进行了初步的探索，结果表明：与常规灌溉相比，地下滴灌能大大增加树木的生长量、提高林地生产力。
2.pubescens leaf characteristic,distribution and photosynthetic character,its culm structure and productivity are studied,the interior law and mechanism are discussed,expecting to provide theory basis for the scientific fertilization of bamboo forest.本文以不同时期施肥处理下的毛竹林为对象,根据毛竹生长节律,对毛竹叶片的大小、重量、叶绿素含量、光合速率等指标进行动态测定,同时测定了毛竹的秆形结构和生物量,研究施肥对毛竹叶片特征及分布、竹叶光合特性、毛竹秆形结构及林地生产力的影响,探讨了竹林施肥增产的内部规律及机制,为毛竹林科学施肥提供依据。
英文短句/例句
1.Studies on Soil Degradation and Soil Productivity Maintenance Measures for Continuous Cropping Poplar Trees;杨树连作地力衰退及林地生产力维持技术的研究
2.Study of the Productivity Coupling Effect of Farmland and Woodland on the West of Songnen Plains;松嫩平原西部农田与林地生产力耦合作用的初步研究
3.Effects of Upside Broadleaf Forest on the Productivity of Phyllostachys Heterocycla var. Pubescens Forests of Mountain Areas in Northern Fujian Province;闽北山地上位阔叶林对毛竹林生产力的影响
4.Study on the Technology of Forest Vegetation Productivity Monitoring Based on RS and GIS基于RS和GIS林地植被生产力估测研究
5.STUDY ON EFFECTS OF SITE PRODUCTIVITY AND PLANTATION PRODUCTIVITY OF EUCALYPTUS UROPHYLLA WITH THE CONTINUOUS-PLANTING ROTATION;连栽尾叶桉人工林生产力与地力效应的研究
6.Study on Potential Food Productivity and Population Supporting Capacity of Land in Yulin;榆林市粮食生产潜力及土地人口承载力研究
7.Study on land productive potential and population supporting capacity in Yuling Municipality;榆林市土地生产潜力及人口承载力研究
8.Forest Eco-economic Productivity and the Development of Forestry Produce;森林生态经济生产力与林业生产发展
9.A Study on the Biomass and Productivity of Acacia spp. Plantation on Minnan Mountain;闽南山地相思人工林生物量及生产力分析
10.A Study on Long-term Site Productivity of Different Forest Types in Jiulongshan Mountain;九龙山不同森林类型立地长期生产力研究
11.Study on the Effects of Enclosing and Transferring on Grassland Productivity in Xilinguole;围封转移对锡林郭勒盟草地生产力影响研究
12.Relationship Between Wood Productive Cycle and Asset Price of Forestland;林木生产周期与林地资产价格的关系
13.Promoting the Forest Right System Reform The Development of Forestry Productivity推进林权制度改革 发展林业生产力
14.Assessing the Impact of Cultivated Land Change on Grain Productive Capacity:A Case Study in the Central and Western Regions of Jilin Province;耕地变化对粮食生产能力的影响评价——以吉林中西部地区为例
15.Study on Productivity and its Formation Mechanism of Grassland Subsystyem of Forest Ecosystem in Sub-alpline Gongga;贡嘎山亚高山森林生态系统草地亚系统生产力及形成机制研究
16.large robust epiphytic ferns of tropical forest and scrub; Africa and Asia and Australia.生长于热带森林和丛林地带的大而生命力强的附生蕨类植物；产于非洲、亚洲和澳大利亚。
17.The productivities of temperate woodlands and shrublands appear to be mostly between 250 and 800g/??year.温带的疏林地和灌木群落的生产力多数在250-800克／?撸0年范围内。
18.Studies on Potential Land Productivity of Hippophae rhamnoides L. for Fuel Wood and Water and Soil Conservation in Hilly Aea of the Loess Plateau黄土丘陵区沙棘水土保持薪炭林土地生产潜力研究
相关短句/例句
natural soil productivity of forest land林地自然生产力
3)current soil productivity of forest land林地现实生产力
4)stand productivity林分生产力
5)forest productivity森林生产力
1.Spatial pattern and variance of forest productivity based on remote sensing and GIS;基于遥感和GIS的森林生产力空间格局与分异
2.in order to enhance way in forest productivity in Hubei province based on documents collected and sorted out during II type survey achievement in the third forest resource in Hubei Province through analysis on current status of the forest productivity, which offers.笔者在收集、整理我省三次森林资源二类调查成果资料的基础上,通过对森林生产力现状的分析,初步提出了加强管理,全面保护,重点改造低产、劣质林,科学合理的抚育间伐,充分利用成、过熟林等提高我省森林生产力的途径,为科学决策提供参考。
3.The established models in which annual precipitation was incorporated as the principal variable indicate a very closely correlation between forest productivity and its corresponding climatic factors,allowing to simulate distribution pattern of actual forest productivity effectiv.根据中国不同地理区森林生产力和气候环境变量的数据构建了中国森林气候生产力模型，以此为基础研究了气候变化对中国森林生产力的影响。
6)tree productivity林木生产力
延伸阅读
林地生产力林地生产力productivity of forest land }indl shengehanli林地生产力(I)roductivity of forest场川」)林业用地或有林地的总体生产能力。这是一个综合评价森林资源生产力的概念。它包括两方面的内容:一是林业用地利用率;二是有林地的生产力。 林业用地包括有林地、疏林地、灌木林地、未成林造林地、苗圃用地、宜林荒山荒地、采伐迹地、火烧迹地、宜林沙荒地以及林区内林业生产设施和建筑物用地等。林业用地利用率取决于有利用价值的土地中能够用于发展林业的土地数量。据“七五”森林资源清查，中国林业用地面积为26289万公顷，占国土总面积的27.4%，林业用地面积较大，但林业用地利用率较低，有林地只占林业用地的50.05%，远远低于世界林业发达国家的水平。美国、德国、日本、芬兰、朝鲜等国的林地利用率都在90%以上。即使在中国重点林区，它们的林地利用率也低于世界林业发达国家的水平，如吉林为77.5%、黑龙江73 .6%、福建68 .8%、云南63 .7%、湖南55 .1%等。 有林地生产力通常指单位面积上林分立木蓄积量的高低，反映了一个地区或一个国家森林资源的生产力水平。广义还包括经济林和竹木的生产力。这是由子有林地由林分、经济林、竹林构成。目前中国有林地面积为13370万公顷，其中林分面积n 370万公顷、蓄积量10 137万立方米，平均每公顷蓄积量89立方米。(李飞)
