Wild material, genetically improved trees. Depending on the level of management intensity and the genetic material used in the planted forest, different groups of biotechnologies can be used.
依据管理力度的水平和在人工种植林中使用的遗传材料，可以应用不同组别的生物技术。
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.
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。
In the stage of the biological reclamation, I have studied the soil improvement method, the planted forest technology and the farming and forestry multiplexed system.
而生物复垦阶段则研究了覆土改良方法、人工林技术和农林复合系统。
The degenerated ecosystem was transformed into the fine ecosystem obviously, and the degenerated land can be used reasonably by building the planted forest of Tamarindus indica.
通过罗望子人工林的营建，可以明显促使退化的生态系统转变为优良的生态系统，使退化土地得以合理利用。
Variations of peroxidase, sucrose invertase and urease activity in soil from Eucalyptus coppice forest, Eucalyptus newly planted forest, shrub grassland and masson pine forest have been investigated.
研究了桉树萌生林、桉树植苗林、灌草丛和马尾松林地土壤中过氧化氢酶、蔗糖转化酶及脲酶的活性变化。
Variations of peroxidase, sucrose invertase and urease activity in soil from Eucalyptus coppice forest, Eucalyptus newly planted forest, shrub grassland and masson pine forest have been investigated.
研究了桉树萌生林、桉树植苗林、灌草丛和马尾松林地土壤中过氧化氢酶、蔗糖转化酶及脲酶的活性变化。
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