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black locust forest
相关语句
  刺槐林地
     According to research on nutrient cycling of black locust forest in the Loess Plateau, a number of widely used characteristic parameters such as nutrient absorption ratio, nutrient utilizing efficiency, nutrient cycling intensity and nutrient biological cycling ratio have been analyzed and improved.
     根据在黄土残塬沟壑区刺槐林地养分循环研究的实践 ,对目前森林生态系统养分循环研究中普遍采用的养分吸收系数、养分利用效率、养分循环强度和生物循环系数等特征参数所存在的问题进行了分析 ,提出了若干改进意见。
短句来源
     According to the research and practice on nutrient cycle of black locust forest stands in the area of gulled loess plateau,some key problems in the research of nutrient biogeochemical cycle have been discussed.
     根据对黄土残塬沟壑区刺槐林地养分循环的研究和实践 ,对有关养分生物地球化学循环研究中遇到的若干问题进行了讨论。
短句来源
     Based on the analysis of soil moisture of black locust forest in Nihegou watershed in two years,we discovered the soil moisture was in the range of 114.3~133.2 g·kg-1,and the average value was 124.6 g·kg-,which was equivalent to 50% field moisture capacity,so the soil moisture was satisfied for the normal growth of the forest in drought year.
     通过对泥河沟流域刺槐林地土壤水分2 a的监测资料分析发现,在干旱年份,土壤含水量在114.3-133.2 g. kg-1范围内,平均为124.6 g.
短句来源
  刺槐林更新
     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
     The water trends and its spatial variation aswell as the waer consumption characteristics of regenerated forestland have been analysed. Theresults show that the regeneration of black locust forest would encourage the water supplyfrom deep soil zone below 200 cm to roots soil zone and lead to the soil moisture of regeneratedforestland being higher than that of no-regenerated forestland, although the water consump-tion of regenerated forestland might not derease.
     分析了刺槐林更新改造后林地土壤水分动态和空间变异规律及林地耗水特征的变化,结果表明,刺槐林皆伐更新促进了200cm以下深层土壤水分向根层的补给,导致更新幼林地土壤湿度较未更新林地明显提高,而其林地耗水总量却较来更新林地并未减少,甚至增加,表现出富足型的耗水特征。
短句来源
  “black locust forest”译为未确定词的双语例句
     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
     Therefore, the thinning intensity with remaining density of 1110 individuals·hm -2 was optimum for black locust forest in this region.
     因此 ,1110株·hm-2 左右的保留密度是可考虑的间伐强度 .
短句来源
     Based on the field monitoring data, the daily transpiration, monthly transpiration, water requirement and their season changes of black locust forest with 1.5 m×6 m, 1.5 m×3 m density in Fangshan County runoff forest field were studied using Penman-Monteith equation, combining with the data of weather observation and water surface evaporation.
     通过对人为给水和自然水分条件下的1.5m×6m和1.5m×3m密度的刺槐(Robiniapseudoacacia)林的林地蒸发和林木蒸腾定位观测,并结合气象观测资料和水面蒸发观测结果,应用Penman-Monteith方程对该林分日、月蒸腾量和需水量及其季节变化进行了估算。
短句来源
     Study on Water Requirement of Black Locust Forest in Semi-arid Region on Loess Plateau of Northwest Shanxi
     晋西黄土高原半干旱区刺槐林分需水量的研究
短句来源
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  相似匹配句对
     The Cultivation Technique of Black Locust Nectariferous Forest
     刺槐蜜源林培育技术研究
短句来源
     A Study on the Characteristics of Black Locust Firewood Forest
     刺槐薪炭林特性的研究
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
     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
     The litter decomposition rate of mixed forest of poplar and black locust
     杨树刺槐混交林枯落物分解速率的研究
短句来源
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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...

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。

Four kinds of chemical herbicides were applied to black locust forests on Weibei loess plateau to see their effects on stump sprouts and weeds in the forests, the results show that the herbicides could be painted onto the stumps before sprouting or sprayed before the sprouts the latter was better than the former, the investment could be saved by 40. 4 %~67. 9% and working efficiency be raised to 2. 5~4. 0 times if the latter method were used. Herbicides and dosages suitable for the spraying methed...

Four kinds of chemical herbicides were applied to black locust forests on Weibei loess plateau to see their effects on stump sprouts and weeds in the forests, the results show that the herbicides could be painted onto the stumps before sprouting or sprayed before the sprouts the latter was better than the former, the investment could be saved by 40. 4 %~67. 9% and working efficiency be raised to 2. 5~4. 0 times if the latter method were used. Herbicides and dosages suitable for the spraying methed are as follows: 1. 4kg glyphosate or 0.3~0. 5kg osto Per 10 000 stumps to remove unwanted sprouts; 1. 2~ 3. 0kg 2, 4 ─ D or 2. 1kg glyphosate per 10 000 stumps to remove all the sprouts. For weed control in mixed forests between black locust and chinese pine, armand pine, larch and eucommia osto (0. 5kg/hm2) or 2, 4 ─ D (2.0kg/hm2 ) or glyphosate (0. 8kg/hm2) (except for mixed forests of black locust and eucommia) should be sprayed at the end of April. The effectiveness was 83. 2%~87. 6%, working efficieing could be raised to 60 times, investment could be saved by 38. 9 %─60. 0%.

1993~1994年,在渭北黄土高原刺槐改造更新幼林地,用4种化学除草剂对刺槐伐桩萌芽和林地杂草防除进行了研究。结果表明:刺槐伐桩萌条防除应在萌条未木质化阶段用低容量喷雾法施药、或在伐桩未萌芽阶段用涂抹法施药,但前者除萌效果最好。节约投资40.4%~67.9%,提高工效2.5~4.0倍。喷雾法最适药剂种类及有效剂量为:目的伐桩用1.4kg/万丛的革甘膦或0.3~0.5kg/万丛的森革净;非目的伐桩用1.2~3.0kg/万丛的2,4-D丁酯或2.1kg/万丛的革甘群。萌生刺槐分别与油松、华山松、落叶松、杜仲混交幼林地化学除草,应在4月底用有效剂量0.5kg/hm2的森草净或2.0kg/hm2的2,4-DT酯,或用0.8kg/hm2的革甘膦(杜仲除外)低容量喷雾。除草率达83.2%~87.6%,提高工效60倍,节约投资38.9%~60.0%。

 
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