• 结果表明,全氮、碱解氮和有机质是黄土丘陵区人工林土壤主要的肥力指标,其含量能更好地反映土壤肥力状况。

    The results showed that total nitrogen, available nitrogen and organic matter were the main fertility indicators for soil fertility evaluation in the planted forest land on the Loess Plateau.

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  • 在单位面积蓄积量的标准划分时充分考虑到了不同林型标准不同,进而分林型进行指标标准的划分。

    We took different forest types with different standards into account when dividing by stocking volume per unit area. Therefore, we should consider forest types as an indicator standard further.

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  • 水土保持林有效覆盖率是水土保持林建设中的一个重要指标。

    Effective cover rate for soil and water conservation forests is an important index in the construction of forestry.

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  • 结果表明:在现有技术经济指标的情况下,利率为5%时杉木人工林经济成熟龄为17年。

    The results show that: in existing technical and economic indicator situation, the age at economic maturity of Chinese fir plantations is 17 years when the interest rate is 5%.

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  • 结果表明:该竞争指标对杉木人工林适用,所建立的单木生长模型符合精度要求,可用于预估林分生长。

    Result shows, This competition index is suitable to Chinese fir man-made forest, and individual tree growth model accords with the demands of accuracy, it can be used to estimate growth of stands.

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  • 背斜、穹隆和次级断裂控制矿体,地球化学指标与卡林型金矿相似。

    Gold ore bodies are structurally controlled by domes, anticlines and second order faults. This type of gold deposits is similar to the Carlin gold deposits u.

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  • 研究了人工林马尾松的纤维零距抗张强度、细胞壁的纵向弹性模量和硬度等力学指标。

    The tensile strength, modulus of elasticity(MOE) and hardness of Pinus massoniana fibers were determined by using zero-span tension and nanoindentation technique.

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  • 为此 ,用基于验算点处展开泰勒级数的哈桑———林德法计算了轴心压杆稳定可靠性的可靠性指标 ,并同均值一次二阶矩法作了比较 。

    The result obtained has been compared with the one obtained by first order second moment (FOSM) method expanded about mean value.

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  • 为此 ,用基于验算点处展开泰勒级数的哈桑———林德法计算了轴心压杆稳定可靠性的可靠性指标 ,并同均值一次二阶矩法作了比较 。

    The result obtained has been compared with the one obtained by first order second moment (FOSM) method expanded about mean value.

    youdao

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