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water stable aggregate
    Water stable aggregate (>0.5mm) under NTC treatment significantly higher (P< 0.001) than all other treatments.
    降雨前不翻耕+覆盖(ntc)处理0-10 mm土壤>0.5mm水稳性团粒结构百分含量极显著高于其它处理(P<0.001);
    Indexes including organic matter content, water stable aggregate content, mean weight diameter of water stable aggregate, aggregate degree and disperse coefficient were selected to evaluate soil anti erodibility of soil and water conservation forests component of different tree species at different ages.
    运用土壤有机质含量、水稳性团聚体含量、水稳性团粒平均重量直径、团聚度和分散系数等各项指标 ,对不同树种组成、不同林龄水土保持林的土壤抗蚀性能进行分析、评价 .
    The content of water stable aggregate in 0~20cm layer was increased in no tillage in that the soil structure was less destroyed.
    免耕对土壤结构破坏少 ,使 0~ 2 0cm土层水稳性团粒结构增多 .
    From the analysis of soil physical mechanics properties, the clay content and physical clay content decreased 2.74% and 3.01% respectively, and the > 0.25 mm water stable aggregate content also decreased 58.7%, the soil unit weight increased and the soil shear strength decreased, all of which were easier to cause soil erosion.
    通过分析土壤物理力学性质表明,林地开垦侵蚀10年土壤粘粒和物理性粘粒比林地分别减少2.74%和3.01%,土壤向粗骨化趋势发展,>0.25 mm水稳性团粒含量减少58.7%,土壤容重增大,抗剪强度下降,抵抗径流冲刷能力减弱,造成土壤侵蚀更易发生;
    The results of the correlation analysis showed that > the 0.25 mm water stable aggregate content was the maximum affecting factor to soil erosion, the partial correlated coefficient was 0.9728, and then were soil coarse grain and soil shear strength, the partial correlated coefficients were 0.8879 and 0.6020 respectively.
    应用相关分析表明,>0.25 mm水稳性团粒含量的改变对土壤侵蚀强度影响最大,其偏相关系数为0.9728,其次是土壤的粗粉粒和抗剪强度,偏相关系数分别为0.8879和0.6020;
    The relation between the >0.25 mm water stable aggregate content, the soil sheer strength and the soil erosion intensity were analyzed.
    分析>0.25 mm水稳性团粒含量和抗剪强度与土壤侵蚀强度关系表明,林地开垦后侵蚀1年和侵蚀7年为土壤侵蚀加剧的转折年限,说明退化的侵蚀土壤和退化的生态环境加剧了土壤侵蚀的发生和发展。
    the anti-erodibility of soils also varied correspondingly with the water stable aggregate and organic matter contents. Other indices do not reflect precisely the anti-erodibility of soils.
    水稳性团粒含量和有机质含量的变化规律与实际相符,其它指标则表现无规律。
    The results showed that the more than 0.25mm water stable aggregate content is soil anti erodibility index in the Middle Reaches of North Panjiang River.
    研究结果表明 ,>0 .2 5mm的水稳性团粒含量可作为北盘江中游地区土壤抗蚀性指标。
    Based on the soil properties in the forest lands and reclaimed forest lands, the changes of the soil particle, organic matter content, >0.25mm water stable aggregate content, soil weight and shear strength were analyzed with the increasing of the erosion time.
    以林地及其开垦地土壤颗粒组成、有机质含量、>0 .2 5mm水稳性团粒含量、土壤容及土壤抗强度等性质为基础 ,分析比较了林地及林地开垦后侵蚀 10年内土壤退化问题。
    At last, the relation between the >0.25 mm water stable aggregate content, soil sheer strength and the soil erosion modulus unit rainfall erosion force was analyzed, which showed that the first and seventh year were the turn year after the forestlands reclaimed, and reveled the important factor of vegetation to control the soil erosion in loess plateau.
    最后对 >0 .2 5 mm水稳性团粒含量和抗剪强度与土壤侵蚀强度的关系进行了分析 ,表明林地开垦后侵蚀第 1年和第 7年为土壤侵蚀强度加剧的转折点 ,说明了森林植被在防治黄土高原土壤侵蚀方面的作用。
    The soil characteristics of different land where returning farmland to forests,grass land and farmland were contrasted and researched,including soil bulk density,soil porosity,soil water stable aggregate structure and soil saturated hydraulic conductivity in Datong county of Qinghai province.
    对比研究了青海省大通县不同类型退耕还林地、草地、农田的土壤性质,包括土壤容重、土壤孔隙度、土壤水稳性团粒结构、土壤饱和导水率。
 

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