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    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
    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
    The Dynamic Study on Transpiration Consumption of Black Locust Forest
    刺槐蒸腾耗水的动态研究(英文)
    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
    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
    (3)renew andreform of locust forest;
    (3)更新改造刺槐防护林;
    The rat density was 44. 86%, 14. 61%and 3. 17%respectively in locust forest,weeds and wheat fields. EHF virus dead hamsters were only present on the surface of the expressway, with traces of vehicle crushing.
    夹夜法调查刺槐林、杂草地、麦田的鼠密度分别为 44. 86%、14.61%及 3. 17%.
    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。
    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
    Effect on biomass of stand density of artificial Black Locust forest in semi-arid region of Loess Plateau
    黄土高原半干旱地区刺槐人工林密度与地上生物量效应
    Natural control against Dendrolimus spectabilis in the mixed pine and locust forest
    油松刺槐混交林对赤松毛虫自然控制初步研究
    Study on Comparing of Measuring and Calculating Methods of Actual Evapotranspiration of Locust Forest in Semi-arid Region on Loess Plateau
    黄土半干旱区刺槐林地实际蒸散量测算方法对比研究
    Based on the theory of soil-plant-atmosphere continuum, the paper studies the rule on evapotranspiration of Locust forest in semi-arid region of Loess plateau.
    本论文针对水资源匮乏地区防护林建设亟待解决的造林、营林密度等问题,从土壤—植物—大气连续体(SPAC)理论角度出发,对黄土高原半干旱地区刺槐林地蒸散耗水等内容进行研究,主要探讨以下问题:
    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。
    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。
    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。
    The analysis results pointed out, thepractical productivity of locust forest in gully slope land approached climate productivity, it insunless slope land was 60. 11% of climate productivity, and it in sunny slope land only was2. 5% of climate productivity.
    分析表明陇东黄土高原为壑区南小河沟流域4种主要立地条件类型中,沟坡刺槐林的现实生产力已接近气候生产力,阴山坡为气候生产力的60.11%,阳山坡仅为气候生产力的2.5%。
    Hereby, water resources sufficient use was prompted in plantingslope locust forest, meanwhile, the culture technology of runoff-forest should gain to spread soas to increase locust forest productivity.
    因此,营造山坡刺槐林时,应注意水分资源的有效利用,大力推广径流林业造林技术,以提高刺槐林生产力。
    A study based on the field investigation and indoor analysis shows that locust forest can improve remarkably the content of organic matter and nutritional elements and drop the soil pH and bulk density, improve the productive capability of land, reduce water and soil losses effectively, promote the forming of clay, prevent land degeneration, protect the ecological environment;
    通过野外考查和室内分析研究表明 :黄土高原地区刺槐和侧柏林都可明显提高土壤有机质和营养元素的含量 ,降低 p H和容重 ,增加土体中团聚体的数量 ,提高土地的生产能力 ;
    however, arborvitae land shows stronger acidity and >0.05 mm micro aggregate and less bulk density. The benefit of locust forest land is better than that of arborvitae in preventing land degeneration.
    其中刺槐林地速效养分丰富 ,粘粒和 >0 .2 5mm水稳性团聚体的数量大 ,有明显的粘化层 ,侧柏林地则酸性强 ,容重低 ,>0 .0 5 mm的微团粒含量较高 ,刺槐林防止土地退化的效益强于侧柏林。
 

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