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- Pinus yunnanensis pure forest 云南松纯林
- The plant community structure and its spatial dynamics in natural Pinus yunnanensis forest region, which belonged to Yipinglang Forest Farm of Lufeng County, Yunnan, were field investigated in April 2005. 摘要于2005年4月采用中点四分法对云南省禄丰县一平浪林场云南松天然林区植物群落结构及空间动态进行了实地调查研究。
- The related factors in the mixed forest (mixture of Pinus tabulaeformis and Robinia pseu-doacacia) and pure forest (P. tabulaeformis) were compared. 摘要通过对比油松刺槐混交林与油松纯林内相关因素,研究其对赤松毛虫的自然控制。
- primary Pinus yunnanensis forest 云南松原始林
- secondary Pinus yunnanensis forest 云南松次生林
- The tong-term tune bests of Pinus yunnanensis management lead to bio-diversity decrease, diseases and insect pests damage, genetic degradation, and productivity decline. 摘要长期以来,云南松的纯林经营使得生物多样性降低、林分稳定性变差、遗传品质退化、林分生产力下降,从而导致生态系统功能衰退。
- Pinus yunnanensis Franch. 云南松
- Technology of Transforming Pure Forest of Pinus tabulaeformis 油松纯林改造技术
- The average height and DBH of ? Fokienia hodginsii? in the mixed forest are 2 08 m and 1 50 cm greater than that in the pure forest,respectively. 结果表明,混交林中,福建柏的平均树高和平均胸径,分别比福建柏纯林大2?08m和1?50cm。
- Tomicus piniperda of Pinus Yunnanensis 云南松纵坑切梢小蠹
- The dynamic uptrend of diversity and evenness indexes between mix forest and pure forest are analogical, and on the contrary it is different. 混交林中群落数量、丰富度及多样性指数多数月份高于纯林。
- the bark of Pinus yunnanensis Franch 云南松树皮
- seed production stand of Pinus Yunnanensis 云南松母树林
- Conclusions show that: Judging from water conservation and water use efficiency, mixed forest is better than pure forest, and in pure forest Kalopanax pictus>Koelreuteria panicutata. 混交林对水分的贮蓄和调节能力较强,但各林分供水性能差别不大。
- A Study of Genetic Gain of Pinus yunnanensis Natural Stand 云南松天然林分遗传增益研究
- The results showed that the increments of tree height,DBH and tree volume of Chinese fir pure forest were similar to mixed forest in the first 4 years,but those of pure forest rapid fell later on. 结果表明,纯林杉木生长落后于混交林杉木。与纯林相比,混交林杉木16年生时单株材积增加了70.;10%25;
- Study on the fuel loading forecasting models of Pinus yunnanensis 云南松可燃物载量预测模型研究
- Keywords the bark of pinus yunnanensis;extractives;property; 云南松树皮;提取物;性能;
- It was pure luck that he was home when we called. 非常幸运,我们打电话时他在家里。
- Study and Analysis on Plant Community under the Mingled forest of Pine and Oak, and Pinus yunnanensis and Eucalyptus globules 桉树林、云南松林及松栎混交林下植物群落调查与分析