论文部分内容阅读
一、概况 柏岭位于平山县城西50公里的石质山区。海拔250米,年均降水量578毫米,年均气温17.7℃,最高气温42.5℃,最低气温-17.9℃,无霜期180天左右。竹林地原为梯田,沙质壤土。东西北三角环山,背风向阳,排水良好。现有竹林两片,均为淡竹。据河北省林科所材料,位于三浪沟的一片,是1908年,引入竹兜三株,逐渐扩展起来的。另一片在四羊沟,是30年前栽植的。此后,随着农村体制的变动,其发展经过几起几伏。到现在两片竹林才扩大到20亩。有竹55000株。个体竹龄为3
First, the overview Bo Ling Pingshan County is located 50 km west of the stone mountain. 250 meters above sea level, the average annual rainfall of 578 mm, the average annual temperature of 17.7 ℃, the highest temperature of 42.5 ℃, the lowest temperature of -17.9 ℃, frost-free period of 180 days or so. Bamboo was originally terraced, sandy loam. North and west triangle mountains, lee sunny, well drained. The existing two bamboo, are light bamboo. According to materials from the Forestry Bureau of Hebei Province, a piece located in Sanlanggou was introduced in 1908 and gradually expanded into three bamboo pens. Another piece in the four sheep ditch, was planted 30 years ago. Since then, with the changes in the rural system, its development after a few volts. Up to now, two bamboo forests have been expanded to 20 mu. There are 55,000 bamboo plants. Individual bamboo age of 3