论文部分内容阅读
楚雄洲响鲁林场位于东经102°04’,北纬25°04’。属高原丘陵山地,海拔1,650-2,200米。林地为山地森林红壤,土层厚度50厘米,pH4.5-6.0,质地粘重、结构不良,保肥保水性差。气候冬暖夏凉。年平均降雨量783.5毫米,年蒸发量为降雨量的2-3倍,干湿季明显。月最高温出现在5月,极端高温30℃以上,月最低温出现在12月或1月,极端低温0一-1℃。霜期2个月。属于暖温带针阔叶混交林带。1973年9月,响鲁林场在13林班2小班阴坡坡腹,代表该场优势林分的17年生云南松林内,选设了间伐试验地(1_(-2))和对照区(1_(-1))。试验地和对照区坡度、坡向、地位级相同,立
Chuxiong Chauluolulin Farm is located at longitude 102 ° 04 ’and latitude 25 ° 04’. Is a plateau hilly mountain, 1,650-2,200 meters above sea level. Woodland is a mountainous forest red soil, soil thickness of 50 cm, pH4.5-6.0, the texture sticky, poor structure, fertilizer retention water is poor. The climate is warm in winter and cool in summer. The average annual rainfall of 783.5 mm, the annual evaporation of 2-3 times the rainfall, wet and dry season significantly. The highest temperature in May appeared in May, the extreme high temperature above 30 ℃, the lowest monthly temperature appeared in December or January, extreme low temperature 0 -1 ℃. Frost period 2 months. Belong to warm temperate coniferous and broad-leaved mixed forest belt. In September 1973, in the 17-year-old Yunnan pine forest on behalf of the superior forest, (-1)). Test and control area slope, slope, the same status level, legislation