pure forest

The paper points out that close-to-nature forestry criticizes idea of pure forest, adjusts to the order of nature, pursuing ecological and economic sustainable development, healthy and secure forest.

从生态学角度，指出近自然林业批判人工纯林思想，以遵循自然规律为前提，其追求目标是生态意义和经济意义上有机结合的可持续发展，追求森林健康和森林安全。

Pinus elliottii and pure forest of Pinus massoniana had bad water conservation effect and poor soil fertility.

而湿地松和马尾松纯林保水效果差，土壤肥力低。

The annual return of N and P amounted to 75.740 and 5.493 kg · hm-2 in the mixed forest, respectively, being 113.0% and 79.6% of that in the pure forest.

混交林群落N、P养分年归还量达75.740kg·hm-2和5.493kg·hm-2，分别是杉木纯林的113.0%和79.6%。

Mr Dietrich, who was with his brother on a trip to Chugach National Forest, Alaska, said:' My reaction was one of pure excitement and disbelief.

迪特里希和哥哥一同来阿拉斯加州的中心国家森林旅行，他说，我看到小熊招手的第一反应是兴奋无比，不敢置信。

Mainly in China and Xiaoxing'anling Daxinganling forest areas, and are pure wild.

我国主要产在大兴安岭和小兴安岭林区, 而且都是纯野生的.

The ratio of energy accumulation was higher, and the rate of energy flow was lower in mixed forest than in pure forest.

表明杉观混交林是一种能量生产力较高和维持地力能力较强的杉阔混交类型.同时，混交林的能量累积比大于纯林，能量流动速率则低于纯林；

Generally speaking, the pure forest in the timber volume and growing stock were higher than mixed.

整体来看，杉木纯林的出材量和蓄积量均高于混交林。

The component of entomogenous fungi community and the niche of dominant species in pure forest of Masson's pine

马尾松纯林虫生真菌群落组成及优势种生态位研究

The thickness of the litter layer under spruce fir was greater, the decomposition intensity was bigger, and the organic matter, total nitrogen, available phosphorus were higher, comparing with that under the pure Larix forest.

云冷杉林的枯枝落叶层的厚度和分解状况优于落叶松纯林，且有机质、全氮、速效磷含量高；

Compared with pure stand, mixed forest has a better soil nutrient status, the content of soil organic matter being increased 16.7%.

和纯林相比，混交林林下土壤养分状况有所改善，土壤有机质含量提高了16.7%。