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   locust forest 在 农业基础科学 分类中 的翻译结果: 查询用时:0.201秒
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locust forest    
相关语句
  刺槐
    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
    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%。
短句来源
    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。
短句来源
    The results showed that owing to better layers composition and more litters and roots, abilities of holding water and preventing erosion of Oriental oak forest, Black locust forest and coppice forest of Black locust are stronger than that of others.
    研究表明,栓皮栎林、刺槐林和矮刺槐林具有较好的层次结构、较大的枯落物积累量及根系数量,保水防蚀能力较强;
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
更多       
  刺槐林
    The Growth Potential of Locust Forest Growth in South Xiaohegou Watershed
    南小河沟流域山坡地刺槐林生产潜力分析
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
    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%。
短句来源
    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。
短句来源
    The results showed that owing to better layers composition and more litters and roots, abilities of holding water and preventing erosion of Oriental oak forest, Black locust forest and coppice forest of Black locust are stronger than that of others.
    研究表明,栓皮栎林、刺槐林和矮刺槐林具有较好的层次结构、较大的枯落物积累量及根系数量,保水防蚀能力较强;
短句来源
  刺槐林
    The Growth Potential of Locust Forest Growth in South Xiaohegou Watershed
    南小河沟流域山坡地刺槐林生产潜力分析
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
    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%。
短句来源
    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。
短句来源
    The results showed that owing to better layers composition and more litters and roots, abilities of holding water and preventing erosion of Oriental oak forest, Black locust forest and coppice forest of Black locust are stronger than that of others.
    研究表明,栓皮栎林、刺槐林和矮刺槐林具有较好的层次结构、较大的枯落物积累量及根系数量,保水防蚀能力较强;
短句来源
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Using the hydraulic data of soil observed during two years in site and the basic principles of the soil physics, the paper systemtically analyses soil hydraulic conductivity of plant Locust forests in the loess gulliedhilly region of Longdong. Surface infiltration intensity and unsaturated hydraulic conductivity in soil were survied by means of soil moisture rearrangement. Through selecting infiltration model, Philip's formula(1957) [i(t)=1/2st~(-1/2)+A] has been determined as optimum model in the areas....

Using the hydraulic data of soil observed during two years in site and the basic principles of the soil physics, the paper systemtically analyses soil hydraulic conductivity of plant Locust forests in the loess gulliedhilly region of Longdong. Surface infiltration intensity and unsaturated hydraulic conductivity in soil were survied by means of soil moisture rearrangement. Through selecting infiltration model, Philip's formula(1957) [i(t)=1/2st~(-1/2)+A] has been determined as optimum model in the areas. In order to examine real infiltration capacity in a rain, we simulated infiltration causes under different rain patterns. Moreover, the soil hydraulic conductivity K(θ) may be presented using parameter a and parameter b of soil moisture rearrangement. We have obtained the result that moisture volume percentage is linear with a and b, all correlation coefficients are more than 0.9. Finally, relationship between the soil hydaulic conductivity and main effect factors were also analysed using typical correlaton analysis. According to the above analysis, we could conclude that a great stand should recreate an intensive improvement for the soil hydraulic conductivity, otherwise,a very week improvement on the one hand, its improvement effects are in close relationship with landforms and plain where the stand was planted on the other hand.

本文应用土壤物理学的基本原理,根据两年定位观测的土壤水文资料,对陇东黄土高原沟壑区人工刺槐林地土壤的导水性进行了较为系统的分析和研究。在实验中应用土壤水分再分布法,实测了地表的入渗能力和土体内部的非饱和导水能力。模型选择结果表明,该地区土壤的入渗过程符合菲利普(Philip)方程: i(t)=1/2St~(-1/2)+A 所表示的入渗规律。为了判断实际降雨时地表的入渗情况,确定了S值和积水前时间t_P的计算方法。根据霍顿(Horton)产流理论,用微机模拟计算了不同雨型下的入渗过程。土体内部的导水性可以由土壤导水率K(θ)来表示,而K(θ)又完全可以由土壤水分再分布参数a、b反映出来。拟合结果表明,θ与a、b(θ=at~b)的相关系数在各测点上均在0.9以上。最后,应用典型相关法分析了土壤导水性与各环境因子之间的关系。分析结果证明,林龄较大的林分对土壤的导水能力有较强的改善作用,而林龄较小的林分的这种作用很弱。同时,这种作用的强弱与林分配置的地貌部位有密切的关系。

Experimental results show that sheet erosion in pure arbor forest land without other ve-getative cover such as layer of withered leaves and grass of shrub etc is more stronger than that in bare land under same condition of precipitation and antecedent precipitation Runoff and soil loss in pure locust forest land is 8% and 15% more than that in bare land respectively and in pure oriental arborvitae forest land the figure is 41% more and 2.9 times than that in bare land respectively Integrated forest...

Experimental results show that sheet erosion in pure arbor forest land without other ve-getative cover such as layer of withered leaves and grass of shrub etc is more stronger than that in bare land under same condition of precipitation and antecedent precipitation Runoff and soil loss in pure locust forest land is 8% and 15% more than that in bare land respectively and in pure oriental arborvitae forest land the figure is 41% more and 2.9 times than that in bare land respectively Integrated forest land with arbor-shrubgrass and layer of withered leaves has obvious effect on soil and water conservation According to this the author suggests that effect of forest on soil and water conservation should be brought in to play scientifically.

试验结果表明,在降雨量及前期降雨情况相同的前提下,乔木纯林(无枯落层和草灌等覆被物)比裸露地的面蚀还强烈。纯刺槐乔木林的径流量、土壤流失量分别比裸露地大8%和1.5%;纯侧柏林的径流量、土壤流失量分别比裸露地大41%和2.9%倍。乔灌草结合且的枯枝落叶的完整林地体系水土保持作用显著。作者据此提出了应该科学地发挥林地保持水土作用的建议。

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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