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一、试验地概况和研究方法本试验对两个不同地域类型杉木人工林生物产量进行间伐对比研究,第一试验区设于杉木中心产区湖南会同,第二试验区设于杉木扩大栽培区湖南朱亭。在自然区划上,两个地域均属中亚热带湿润气候区,会同试验区位于相对高度150m以上的丘陵山地,年平均气温16.8℃,1月平均气温4.4℃,7月平均气温26.3℃,年降水量1332mm,土壤为中有机质厚层黄壤;朱
First, the experimental site survey and research methods The experiment of two different types of Chinese fir plantation biomass yield comparative study, the first experimental area is located in the center of production of Chinese fir Huitong, the second experimental area is located in the fir expansion cultivation area of Hunan Zhu Ting. In the natural division, the two regions belong to the subtropical humid climate zone, and will be located in the hilly and mountainous areas with the relative altitude 150m above the test area. The annual average temperature is 16.8 ℃, the average temperature in January is 4.4 ℃, the average temperature in July is 26.3 ℃, and the annual precipitation Amount of 1332mm, soil organic matter thick yellow soil; Zhu