对油松天然林的林分结构进行了研究。
Natural forest stand structure of Pinus tabulaeformis was studied.
四种常绿乔木的除尘能力等级排列为：云杉，针刺杜松，圆柏和柏油松。
The dusts-removing abilities of four types of evergreen trees are ranked as: spruce, needle juniper, Sabina chinensis, and pitch pine.
油松的研究对油松的植物生态学研究具有重要意义。
The study of the Pinus tabulaeformis f. shekanensis is of importance to the phytoecology.
答案就是脆米饼、奶油松糕和啤酒。
探讨了30年生油松天然林的水文效应。
The hydrologic effects of 30-year old natural Chinese pine forests have been measured.
拿奶油松饼时小心点，因为它们容易压坏。
但是，由于缺水，油松的生长经常受到严重制约。
However, the growth of the Pinus trees is prevailingly constrained by shortage of water.
自选牛角包，丹麦甜包或黄油松糕配以果酱，黄油。
Flaky Croissants, Danish Pastries or Muffins with Preserves.
较小的经营密度有利于提高人工油松林胸径生长速率。
Smaller management density was beneficial to increase DBH growth rate of Chinese pine forest.
红脂大小蠹是我国一种危害油松等松树的外来入侵物种。
Dendroctonus valens is a dangerous insect pest of several pine species in China.
油松和麻栎林土壤物理性质与造林密度也有很强的相关性。
Chinese pine and hemp oakery soil physical property also have very strong correlativity with forestation density.
结果表明：（1）油松针叶萜类相对含量以随机变异为主；
The results indicated that: (1 ) the geographical variations of relative contents of most foliar terpenes are irregular;
为了有效地防风固沙，近些年在这里成功地营建了油松林带。
Recent years has witnessed the success of establishing Pinus tabulaeformis tree-belt in purpose of wind-breaking and sand-fixing in this area.
结果表明，在郁闭林分内油松更新苗密度平均为5 375株。
The seedling density regenerated in closed stands is 5 375 ind.
油松茎端的皮层薄壁组织和幼茎木薄壁组织中具含树脂细胞分布。
Some resin containing cells are present in parenchym of cortex in shoot apex and xylem parenchym of stem in Pinus tabulaeformis .
不同的封禁方式客观地反映了人为作用对油松天然更新的干扰程度。
The effects resulted from different patterns of mountain closure objectively reflected the interference level of the human activities to Chinese pine natural regeneration.
本文引进一个建立在油松括号表述上的代数方法，以求解力学问题。
We introduce an algebraic approach to solving mechanical problems based on the poisson bracket formulation is obtained.
传统的下午茶包括精选的三明治，英式奶油松饼，还有蛋糕和其他甜点。
Traditional afternoon tea consists of a selection of dainty sandwiches, scones served with clotted cream. Cakes and pastries are also served.
依据历年调查资料，对麻池背油松天然林的林分生长结构进行了研究。
Based on survey resources in the past years, natural forest stand structure of Pinus tabulaeformis in Machibei was studied.
油松树干液流速率与土壤容积含水量和土壤水势呈明显线性相关关系。
There exists a multi linearship between the stem sap flow velocity and the soil moisture, soil water potential.
栓皮栎月平均树干液流速率较油松的月平均树干液流速率高5-10倍。
The sap flow velocity of Quercus variabilis was 5~10 times higher than that of the Pinus tabulaeformis on a monthly average basis.
传统的下午茶包括精选的三明治，英式奶油松饼，还有蛋糕和其他甜点。
Traditional afternoon tea consists of a selection of dainty sandwiches, scones served with clotted cream.
本文应用平均相对形率系列的方法，对油松和巴山松的干形进行了分折比较。
Stem forms of p. tabuldeformis Carr. and p. henryi Mast, were Compared using the method of average relative form-rate series.
幼虫选择和趋向试验表明：幼虫明显趋向和选择油松球果而不选择华山松球果；
The results of selection and preference of the larvae showed that the larvae of D.
在地震发生大体上为油松过程的情况下，地震间隔时间并不匀称地切合指数分布。
Acturally, earthquake intervals do not coincide with exponential distributions in spite of their Poisson process belongings.
实践表明，只要播区、播期选择适宜，该区飞播油松成林面积可望占30%左右。
The practice showed that the forest area may account for about 30%of the total sown area, so long as the Suitable sown area and sowing time are chosen.
在华北石质低山干旱阳坡，提高油松植苗造林成活率及生长量的关键，在于蓄水保墒。
The key techniqure to improve the survival and growth of Pinus tabulaeformis on dry south sides in lower rocky mountain in North China is to keep water for raising soil moisture.
本文主要研究了菌根制剂生产工艺的优化及其复合胶囊菌剂对油松幼苗的生长促进作用。
This paper mainly studied Optimization of Production Process for Complex Ectomycorrhizal Fungal and Bacterial Fertilizers and its Effects on Chinese pine seedings.
本文主要研究了菌根制剂生产工艺的优化及其复合胶囊菌剂对油松幼苗的生长促进作用。
This paper mainly studied Optimization of Production Process for Complex Ectomycorrhizal Fungal and Bacterial Fertilizers and its Effects on Chinese pine seedings.
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