| 1. | The causes and management of the decline of pinus sylvestris var . mongolica
樟子松枯死原因与防治技术研究 |
| 2. | Study on the physical property of soil water of pinus sylvertris var . mongolica plantation in zhanggutai area
章古台地区樟子松人工林土壤水分物理性质的研究 |
| 3. | Discussion on the climate conditions occurring quot; 5 183 ; 16 quot; large forest fire in hong - hua - er - ji mongolica stands
红花尔基樟子松林重大火灾发生的气候条件探讨 |
| 4. | The soil nutrient , microorganism and enzyme activity are studied and analyzed in pinus sylvestris var . mongolica plantations in zhanggutai area
摘要对章古台不同林龄樟子松人工林土壤养分、微生物及酶活性进行了测定和分析，结果表明：各林地的土壤养分、微生物和酶活性均表现出差异。 |
| 5. | 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
二代林放线菌类群中具有兰色类群和玫瑰紫亚类，樟子松林则没有，而樟子松林土壤具有的放线菌中的金色类群和绿色类群，二代林则没有。 |
| 6. | The investigation on the species and amount of the pest in burned forest in heihe area showed the plantation of pinus slyuestris var . mongolica and larix gmelinii were easily attracted by ips spp . and anoplophora spp . . the relationship between the smoked height and diameter at breast height of poles and the occurrence of the pests was analyzed with binary logistic regression
摘要文章通过对黑河地区过火林地的虫害发生数量和种类的调查研究，表明樟子松和落叶松人工林在火烧后极易受到小蠹类和天牛类蛀干害虫的攻击。 |
| 7. | 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
本文通过固定和典型样地，对东北山地不同生长发育阶段落叶松人工林和二代落叶松幼龄林以及与二代落叶松幼龄林同一块林地的樟子松幼龄林、天然次生林、落叶松水曲柳混交林等8个林型土壤质量进行了对比与分析，深入探讨了落叶松人工林土壤质量降低的机理和不同发育阶段土壤质量变化规律以及与森林生产力变化的关系，并提出了林地土壤质量调控措施。 |
| 8. | Base on discuss , choosing mongolian scotch pine and manchurian ash as experiment species , using three kinds of wood fire - retardant treatment methods which included soaking at some pressure , pressurized soaking under ultrasonic wave and the pressurized soaking under ultrasonic wave after treated by microwave , the result is that ultrasonic wave may apply in wood fire - retardant treatment production
在讨论的基础上，以樟子松和水曲柳为木材试样，选择压力浸渍、超声波加压浸渍和微波处理后超声波加压浸渍3种木材阻燃处理方法，经过试验，说明在生产阻燃木材的浸渍方法中引入超声波技术是可行的。 |
