论文部分内容阅读
我场位于皖东丘陵地区,年平均气温15.2℃,年降雨量1023.1毫米,年蒸发量1565.4毫米,无霜期215天,黄棕壤瘠薄、含石砾多。自五十年代建场以来,营造了二万多宙马尾松、黑松与麻栎、小叶栎、栓皮栎的混交林,混交方式多为行间和不规则的株间混交,初植密度均在400株/亩以上,一般化管理,现多数生长良好。
My field is located in hilly areas in eastern Anhui Province, the annual average temperature of 15.2 ℃, the annual rainfall of 1023.1 mm, the annual evaporation of 1565.4 mm, 215 days frost-free period, yellow brown soil barren, with more gravel. Since the establishment of the site in the 1950s, more than 20,000 hybrid forests of Pinus massoniana, Pinus thunbergii and Quercus acutissima, Quercus mongolica and Quercus variabilis have been created. The mixed modes are mostly intercropping and irregular intercropping. The average initial planting density In 400 plants / mu above, the general management, now most grow well.