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火炬松已在我国南方14省(区)大面积栽植。为了揭示不同的营林措施对火炬松地上、地下部份生长发育的影响,从而采取集约的营林措施达到速生丰产优质之目的,并为合理经营、综合利用,挖掘生产潜力提供科学依据。特将试验研究的结果整理成文供深入研究和营林活动中参考。一、试验地的自然条件本研究是在马鞍山市林场成片的火炬松人工林中进行的。林地位于北纬31°32′,东经118°3′。海拔高度30米。为山地黄壤,质地轻壤—中壤,土层厚度1米左右,pH5.5—6.0。年平均温度16℃,年降雨量825—1552毫米,年平均蒸发量为1605.3毫米,极端最高温度39.1℃,极端最低气温-8℃,无霜期239天。
Loblolly pine has been planted in large areas in 14 provinces (autonomous regions) in southern China. In order to reveal the impact of different silvicultural measures on the growth and development of the understory and understory parts of the Pinus taeda, intensive measures of silviculture are adopted to achieve the goal of fast growing, high yield and quality, and provide scientific basis for rational management, comprehensive utilization and potential production. The results of the pilot study will be specially compiled for in-depth study and forest management reference. First, the natural conditions of the experimental site This study was carried out in the Pinus armandii plantation in Maanshan Forest Farm. The woodland is located at latitude 31o 32 ’north and longitude 118o 3’ east. 30 meters above sea level. Yellow mountain soil, light soil texture - the soil, soil thickness of about 1 meter, pH5.5-6.0. The annual average temperature is 16 ℃, the annual rainfall is 825-1552mm, the annual average evaporation is 1605.3mm, the extreme maximum temperature is 39.1 ℃, the extreme minimum temperature is -8 ℃ and the frost-free period is 239 days.