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  wild trees
An extrapolation of the species accumulation curve among stands indicated that the whole system, composed of more than 100 coffee plantations, may harbour as many as 34 species of wild trees.
      
Our simulations show that even partial sterility can provide very substantial reductions in gene flow into wild trees.
      
In addition, fluctuations in mature needles were shown for a set of ten wild trees.
      
Wild trees exhibit a very high variation from tree to tree, which obscures the influence of needle age and position.
      
The extractable monoterpenes from needles of two groups of trees - 4-year-old clonal and 20-year-old wild trees - were studied with respect to the influence of individual constitution, needle age, whorl position, and position on branch.
      
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In this paper,"Big Trees Trans-planting"means to transplant large young trees from nursery or the following special situations:road reconstruction,green-land replacement and the thinning of the dense plantings.It means neither the transplant-ing from mountain forest and rural area,nor transplanting big wild trees,ancient trees or famous trees.It analyses the re-lation between economic benefit and eco-logical benefit so as to discuss the danger of transplanting big trees from mountain...

In this paper,"Big Trees Trans-planting"means to transplant large young trees from nursery or the following special situations:road reconstruction,green-land replacement and the thinning of the dense plantings.It means neither the transplant-ing from mountain forest and rural area,nor transplanting big wild trees,ancient trees or famous trees.It analyses the re-lation between economic benefit and eco-logical benefit so as to discuss the danger of transplanting big trees from mountain to suburbs.

“大树移植”应指移栽苗圃培育的大规格苗木,或者道路改建扩建、绿地调整、密植抽稀等特殊情况下产生的移植树木,而不是从山区林地或农村周围挖来的大树,更不是指野生大树和古树名木。为此,文章分析了经济效益与生态效益的关系,论述了上山挖掘大树到城市移栽的危害性。

 
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