pinus sylvestris 中文意思是什麼
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Differences among pinus sylvestris provenances were observed at one year of age but not at two years.
歐洲赤松種源間的差異僅在一年生時可以看到，兩年生時就看不到。 -
The soil nutrient, microorganism and enzyme activity are studied and analyzed in pinus sylvestris var. mongolica plantations in zhanggutai area
摘要對章古臺不同林齡樟子松人工林土壤養分、微生物及酶活性進行了測定和分析，結果表明：各林地的土壤養分、微生物和酶活性均表現出差異。 -
The causes and management of the decline of pinus sylvestris var. mongolica
樟子松枯死原因與防治技術研究 -
The new addition of cyaneus in actinomycetes group in rhizosphere soil and non - rhizosphere soil may be fundamental reason for the second rotation effect. ( 4 ) compared to the young stand of pinus sylvestris var
二代林放線菌類群中具有蘭色類群和玫瑰紫亞類，樟子松林則沒有，而樟子松林土壤具有的放線菌中的金色類群和綠色類群，二代林則沒有。 -
The study has investigated and compared soil physical, chemical, biochemical properties of eight stands on paired sites in mountainous regions of northeastern china, trying to look for the mechanism of soil degradation and the change trend of soil properties in different age of plantations in relations to forest productivity. the eight stands are 4 first rotation of larix olgensis plantations with different age classes, the second rotation of larix olgensis young stand, pinus sylvestris var
本文通過固定和典型樣地，對東北山地不同生長發育階段落葉松人工林和二代落葉松幼齡林以及與二代落葉松幼齡林同一塊林地的樟子松幼齡林、天然次生林、落葉松水曲柳混交林等8個林型土壤質量進行了對比與分析，深入探討了落葉松人工林土壤質量降低的機理和不同發育階段土壤質量變化規律以及與森林生產力變化的關系，並提出了林地土壤質量調控措施。 -
The strategy and measures to prevent the soil degradation of pinus sylvestris var. mongolica were put forward, including application of thinning rationally for existing dense plantations and establishment of mixture forest for new plantations
解決當前人工林退化的主要措施是因地制宜進行間伐或輪伐，改善林地微生態條件，盡量避免營造人工純林，建議營造混交林。
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