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优化群落结构
相关语句
  the optimal community structure
     The Primary Use of Biomass in Setting up the Optimal Community Structure
     生物量在建立优化群落结构中的应用———以昆明地区滇青冈萌生灌木群落为例
短句来源
  optimal community structure
     The Primary Use of Biomass in Setting up the Optimal Community Structure
     生物量在建立优化群落结构中的应用———以昆明地区滇青冈萌生灌木群落为例
短句来源
  “优化群落结构”译为未确定词的双语例句
     The mixed seeding test showed that the aboveground biomass and community structure of mixed seeding Elymus sibiricus L.30%+Festuca sinehsis Keng 70% and Elymus nutans Griseb 70%+Festuca Rryloviana Rererd 30% were better than that of other mixed seeding and single-seeding in the second and third year,showing that mixed seeding of perennial grass species waw better method of resolving single variety,improving community structure,increasing herbage yield in alpine cold pasture.
     混播试验表明 ,多叶老芒麦 3 0 % +中华羊茅 70 %的垂穗披碱草 70 % +西北羊茅 3 0 %在第二、三年群落结构和产草量优于其它混播处理和单播。 说明在高寒牧区利用多年生禾本科牧草混播是解决人工草地品种单一 ,优化群落结构 ,提高产草量的较好途径。
短句来源
     (2) to prohibit disturbance so as to increase the species diversity and optimize the community structures;
     ②封山育林、严禁打柴,增加物种多样性,优化群落结构;
  相似匹配句对
     Structure Optimization
     结构优化
短句来源
     the optimization of the structure of financial expenditure;
     财政支出结构优化
短句来源
     the structural and the ecological characteristics of the community;
     群落结构和生态学特征;
短句来源
     Compared the actuality of the structure of th
     *; 结构;
短句来源
     Ecological and economic effects of complex community and food chain construction and its opti-mization in paddy field.
     稻田群落食物链结构优化与生态经济效益分析
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  optimal community structure
Cultivating fast growth and rich yield plantation directionally in optimal community structure by use of forest edge effect theory.
      


In this paper, writer tried to set up the optimal plant community structrre with the biomass of community. By the studying of the condition of Lithocarpus dealbotus sprouted Shrub community sturcture, the hight growth, the base diameter growth rate of Lithocarpus dealbatus, biomass and the gross relationship between the biomass and the amount of sprouted branches colony, it can be seen: if 4-7 branches per root piling or 14 000-24 500 branches per hactare being reserved, the biomass of sprouted branches colony...

In this paper, writer tried to set up the optimal plant community structrre with the biomass of community. By the studying of the condition of Lithocarpus dealbotus sprouted Shrub community sturcture, the hight growth, the base diameter growth rate of Lithocarpus dealbatus, biomass and the gross relationship between the biomass and the amount of sprouted branches colony, it can be seen: if 4-7 branches per root piling or 14 000-24 500 branches per hactare being reserved, the biomass of sprouted branches colony can reach to the maxmium. This is the optimal community structure. Setting up the optimal community structure needs to adopt corresponding measures, for example, reserving sparse branches instead of dense, reseting strongger instead of weaker, thus the superiority of sprouted shrub community can be completely givpn play to and the amount of forest resource per area can be improved greatly.

本文尝试了生物量的研究在建立群落优化结构中的应用.对昆明地区滇石栎萌生灌木群落的结构现状、滇石栎萌枝的高生长、基径生长、生物量和生长量的研究,特别是每个根桩上萌枝数量和萌枝群体生物量之间关系的研究,结果表明.每个根桩上保留4~7个萌枝,每公顷面积内保留14000~24500个萌枝,可使萌枝群体生物量达到最大.此即较优化的群落结构.建立优化的群落结构还要采取相应的措施,如去密留疏,去小留大,去弱留强等,这样才能充分发挥萌生灌木群落的潜在优势,才能大大提高单位面积上的森林资源量。

In this paper, writer tried firstly to set up the optimal community structure with the biomass of community. By studying the condition of Cyclobalanopsis glaucoides sprouted shrub community structure, the height growth, the base diameter growth, biomass and the gross average growth rate of Cyclobalanopsis glaucoides, especially the relationship between the amount of sprouted branches per root piling and the biomass of sprouted branches colony, it can be seen:if 5 branches were reserved per root piling and branches...

In this paper, writer tried firstly to set up the optimal community structure with the biomass of community. By studying the condition of Cyclobalanopsis glaucoides sprouted shrub community structure, the height growth, the base diameter growth, biomass and the gross average growth rate of Cyclobalanopsis glaucoides, especially the relationship between the amount of sprouted branches per root piling and the biomass of sprouted branches colony, it can be seen:if 5 branches were reserved per root piling and branches per metares square the biomass of sprouted branches colony can reach the maxmium. This is the optimal community structure. Setting up the optimal community structure needs to adopt corresponding measures, for example, reserving sparse branches instead of dense, reserving bigger instead of smaller, and reserving strongger instead of weaker, thus the superiority of sprouted shrub community can be completely given play to and the amount of forest resources per area can be improved greatly.

通过对昆明地区滇青冈萌生灌木群落优势种滇青冈萌枝的高生长、基径生长、生物量和生长量的研究,特别是滇青冈每个根桩上的萌枝数和萌枝群体生物量之间关系的研究,建立了高生产力优化群落结构.研究结果表明,优化的群落结构每个根桩上保留5个萌枝,每平方米保留2.2个萌枝,可使萌枝群体的生物量最大.建立优化的群落结构还要采取相应的措施,如去密留疏、去小留大、去弱留强等,这样才能充分发挥萌生灌木群落的优势,才能大幅度提高单位面积上的森林资源量

During the period of controlling the overwintering generation Dendrolimus punctatus in similar stands in 5 forestry farms with the different control strategy along the southern shore of Changjiang River,arthropoda and entomogenous fungi communities were surveyed.The result showed that comparing the communities of the forestry farms with Beauveria bassiana releasing every year with that in the forestry farm controlled by insecticides,the species number of pests were around 50%,the individuals were 70%...

During the period of controlling the overwintering generation Dendrolimus punctatus in similar stands in 5 forestry farms with the different control strategy along the southern shore of Changjiang River,arthropoda and entomogenous fungi communities were surveyed.The result showed that comparing the communities of the forestry farms with Beauveria bassiana releasing every year with that in the forestry farm controlled by insecticides,the species number of pests were around 50%,the individuals were 70% or so,the ratio of natural enemy to pest species number ( Ns/Ps ) was 0.72~0.83,the ratio of natural enemy to pest individuls number ( Nn/Pn ) was 0.44~0.45,idexes of diversity ( H′ ) fluctuated little,and population densities of D.punctatus ≤2.0 heads/tree.Within the forestry farms with alternated releasing of B.bassiana and applying insecticides,overflowed applying insecticides,and non controlling forestry farms,the pest species number was around 60%,individual number was 70% or so, Ns/Ps was 0.46~0.54, Nn/Pn 0.23~0.34 , H′ fluctuated greatly,and the population densities of D.punctatus was 6.0~10.0 heads/tree,which was over the control threshold (5 heads/tree).A long time realesing B.bassiana formulation and selecting appropriate suppression were beneficial to optimizing community structure.

在皖南春季越冬代马尾松毛虫防治时期,于安徽长江以南采用不同治虫策略的5个林场,选立地条件和林分状况类似的马尾松纯林,对节肢动物和虫生真菌群落的调查表明,常年释放白僵菌的林场和长期监测虫情、准确挑治虫源地的林场害虫种数约占群落总种数的50%,个体数约占70%,益害物种数比(Ns/Ps)为0.72~0.83,个体数比(Nn/Pn)为0.44~0.45,多样性指数(H′)波动小,松毛虫虫口≤2.0条·株-1。交替放菌和施药的林场,滥用农药、尤其不治虫的林场,害虫种数约占群落总种数的60%左右,个体数>74%,Ns/Ps0.46~0.54,Nn/Pn0.23~0.34,H′波动大,松毛虫虫口6.0~10.0条·株-1,超过防治指标(5条·株-1)。长期的放菌或及时施药挑治利于优化群落结构,增大多样性指数,强化生态控制的力度

 
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