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locust forest    
相关语句
  刺槐
    Influence of Black Locust Forest Improvement on the Water Situation of Forestland
    刺槐林更新改造对林地水分环境的影响
短句来源
    A STUDY ON OPTIMUM DENSITY OF SOIL AND WATER CONSERVATION BLACK LOCUST FOREST IN TAIHANG MOUNTAIN
    太行山刺槐水土保持林的适宜密度研究
短句来源
    The Dynamic Study on Transpiration Consumption of Black Locust Forest
    刺槐蒸腾耗水的动态研究(英文)
短句来源
    Modeling of the daily transpiration variaton in locust forest by Penman-Monteith equation
    刺槐日蒸腾过程的Penman-Monteith方程模拟
短句来源
    Study on Water and Density Growth Effect of Locust Forest at Semiarid Region on Loess Plateau
    黄土高原半干旱区人工刺槐林水分密度生长效应研究
短句来源
更多       
  刺槐林
    Influence of Black Locust Forest Improvement on the Water Situation of Forestland
    刺槐林更新改造对林地水分环境的影响
短句来源
    Study on Water and Density Growth Effect of Locust Forest at Semiarid Region on Loess Plateau
    黄土高原半干旱区人工刺槐林水分密度生长效应研究
短句来源
    Clear-cutting and Root-sprout Regeneration Is An Efficient Way for Large-scale Reforming of Locust Forest
    皆伐萌蘖更新是改造刺槐林的有效途径
短句来源
    Based on the building of gray system prediction model for locust current annual incre-ment of high and breast diameter,we advanced a managerial principle for the artifical locust for-est in Changwu agri-ecology experimental station,that we should use the forest as its early stageand take fostering small pole as the objective,so as to raise the economic benefit of locust forest.
    通过对刺槐树高、胸径连年生长量的灰色预测GM(1,1)模型的建立,提出长武王东试区刺槐人工林应采取早期利用,以培育小径材为目标的经营原则,以提高刺槐林的经济效益。
短句来源
    The re-sult of experments and researchs in Changwu conuty,Shaanxi province showed that clear-cuttingand root-sprout regeneration is an efficient way of reforming lower product locust forest.
    经我们在长武王东沟试验区多年试验研究表明:皆伐萌蘖更新是改造低产值刺槐林的有效途径。
短句来源
更多       
  刺槐林
    Influence of Black Locust Forest Improvement on the Water Situation of Forestland
    刺槐林更新改造对林地水分环境的影响
短句来源
    Study on Water and Density Growth Effect of Locust Forest at Semiarid Region on Loess Plateau
    黄土高原半干旱区人工刺槐林水分密度生长效应研究
短句来源
    Clear-cutting and Root-sprout Regeneration Is An Efficient Way for Large-scale Reforming of Locust Forest
    皆伐萌蘖更新是改造刺槐林的有效途径
短句来源
    Based on the building of gray system prediction model for locust current annual incre-ment of high and breast diameter,we advanced a managerial principle for the artifical locust for-est in Changwu agri-ecology experimental station,that we should use the forest as its early stageand take fostering small pole as the objective,so as to raise the economic benefit of locust forest.
    通过对刺槐树高、胸径连年生长量的灰色预测GM(1,1)模型的建立,提出长武王东试区刺槐人工林应采取早期利用,以培育小径材为目标的经营原则,以提高刺槐林的经济效益。
短句来源
    The re-sult of experments and researchs in Changwu conuty,Shaanxi province showed that clear-cuttingand root-sprout regeneration is an efficient way of reforming lower product locust forest.
    经我们在长武王东沟试验区多年试验研究表明:皆伐萌蘖更新是改造低产值刺槐林的有效途径。
短句来源
更多       
  刺槐
    Influence of Black Locust Forest Improvement on the Water Situation of Forestland
    刺槐林更新改造对林地水分环境的影响
短句来源
    A STUDY ON OPTIMUM DENSITY OF SOIL AND WATER CONSERVATION BLACK LOCUST FOREST IN TAIHANG MOUNTAIN
    太行山刺槐水土保持林的适宜密度研究
短句来源
    The Dynamic Study on Transpiration Consumption of Black Locust Forest
    刺槐蒸腾耗水的动态研究(英文)
短句来源
    Modeling of the daily transpiration variaton in locust forest by Penman-Monteith equation
    刺槐日蒸腾过程的Penman-Monteith方程模拟
短句来源
    Study on Water and Density Growth Effect of Locust Forest at Semiarid Region on Loess Plateau
    黄土高原半干旱区人工刺槐林水分密度生长效应研究
短句来源
更多       

 

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The site types were classfied according to enviromental factors in this paper. Both of the relationships between soil water and other enviromental factors, and between the mean height of dominant trees and some factors of site (topography, the type of lithic and the soil type utilized) were analysed with quantitative theory I . The results showed major factor influncing the growth of local artificial forest of locust (Robinia pseudoacacia L. ) was soil water condition affected mainly by local topographic factors....

The site types were classfied according to enviromental factors in this paper. Both of the relationships between soil water and other enviromental factors, and between the mean height of dominant trees and some factors of site (topography, the type of lithic and the soil type utilized) were analysed with quantitative theory I . The results showed major factor influncing the growth of local artificial forest of locust (Robinia pseudoacacia L. ) was soil water condition affected mainly by local topographic factors. A table of local soil water class and forecasting equation of mean height of dominant trees of artificial locust forest with base age were established in this paper. A table of the site types suit for this region and a site map within the area of 1335.0 hectares were made as well

此项研究根据环境因子划分立地条件类型,用“数量化理论Ⅰ”分析了土壤水分与其它环境因子之间,以及刺槐人工林地的优势木平均树高与林地某些因子(地形、黄土母质类型和造林前的土地利用类型)之间的关系。结果认为,土壤水分因子是影响当地刺槐人工林生长的主导因子,而土壤水分状况主要受当地地形因素的影响。提出了该地区土壤水分等级表,和刺槐人工林标准林龄优势木平均树高的预测方程式。并编制了适合该地区的立地条件类型表,绘制了1355.0公顷面积范围内的立地图。

The characteristics of black locust forest for firewood were studied. The results are summarized briefly as follows: Black locust grows fast on light soil on hill slopes facing south or half south in semiarid areas. The root system develops horizentally to 3×12m~2. The yield of firewood from the ravine facing south is higher than that from hillsides facing south or other directions after the planting. Firewood yield may increase if the hilldes are closed to facilitate afforestation. As for har-...

The characteristics of black locust forest for firewood were studied. The results are summarized briefly as follows: Black locust grows fast on light soil on hill slopes facing south or half south in semiarid areas. The root system develops horizentally to 3×12m~2. The yield of firewood from the ravine facing south is higher than that from hillsides facing south or other directions after the planting. Firewood yield may increase if the hilldes are closed to facilitate afforestation. As for har- vesting method, short interval clear-cutting (at the interval of 2~3years) is recommended. Black locust sprouts easily. When the trees of twelve years are cut, each plant may sprout 9.6 shoots on average. The firewood after cutting has a low water content (29%) and is combustible when moist. Its caloric value is higher than that of poplar or willow trees. The forest can be renewed easily with suckers.

发展薪炭林是尽快解决农村能源有效的途径之一,1983年经对凌源、建平刺槐薪炭林特性的测试表明:刺槐在半干旱地区的阳坡半阳坡薄土层山地生长较快,8年生进入材积速生期,水平根系发达,根幅3×12米~1,产柴量;朝南沟谷地高于半阴半阳坡地;造林后封山育林明显高于不封山育林;采用短周期平茬高于其它采柴方式。刺槐萌芽力强,12年生树平茬后平均每株发萌条9.6根,薪柴含水率较低(湿柴含水29%);易燃,湿柴就可做燃料,热值高于杨、柳树。

Analyses runoff,sediment,ground cover and the cover ratio of nine forest types.The results are as follows.(1)The benefits of soil and water conservation in little leaf peashrub and black locust forest are excellent;the benefits in sea buckthorn and black locust forest from young growth to the old are good;the benefits of reducing ruonff and sediment in little leaf peashhrub,sea buckthorn & chinese pine and sea buckthorn & simon poplar forest from young growth to the old are relatively poor.(2)The...

Analyses runoff,sediment,ground cover and the cover ratio of nine forest types.The results are as follows.(1)The benefits of soil and water conservation in little leaf peashrub and black locust forest are excellent;the benefits in sea buckthorn and black locust forest from young growth to the old are good;the benefits of reducing ruonff and sediment in little leaf peashhrub,sea buckthorn & chinese pine and sea buckthorn & simon poplar forest from young growth to the old are relatively poor.(2)The effective cover ratio of the forest for soil and water conservation must be over 60%.(3)The function of living cover under the forest in sediment- binding is of significance.(4)The forest ground litter shows a special function in conserving water and improving physical properties of the'soil.

本文对9个森林类型的径流、泥沙、覆盖度、地被物观测分析表明:不同类型森林的水土保持效益以柠条、刺槐成林最好;沙棘、刺槐从幼林到成林次之;柠条、沙棘×油松、沙棘×杨树从幼林到成林减沙的效益较差。森林的水土保持有效覆盖度为60%以上。林下活地被物对减少泥沙的作用显著,林地枯落物层对涵养水源、改善土壤物理性质有特殊作用。

 
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