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.
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.
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.
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%.
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.
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.
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.
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.
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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