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延吉县依兰国营林场,地处长白山东麓,地势多在海拔200～700米之间,全年平均气温5℃,总降水量504毫米,土壤为暗棕色森林土。总经营面积为28,460公顷,其中天然次生林面积为21,121公顷,人工林面积为3,540公顷,在人工林中落叶松为1,851公顷,红松为1,495公顷。该场从1958年起进行红松直播造林,连续两年共直播红松191.7公顷,占红松人工林面积的12.8％。众所周知,红松直播造林比植苗造林具有节省投资,简便宜行的优越性。但是,直播红松在经过一段较长时间之后生长究竟怎么样?与植苗红松相比有哪些差异?直播造林对红松是
Yanji County Yilan state-owned forest farms, is located in the eastern foot of Changbai Mountain, mostly at an elevation of 200 to 700 meters, the annual average temperature of 5 ℃, the total rainfall of 504 mm, the soil is dark brown forest soil. The total operating area is 28,460 hectares, of which 21,121 hectares are natural secondary forests, 3,540 hectares are plantations, 1,851 hectares are larch plantations and 1,495 hectares are pine trees in plantations. The field from 1958 direct afforestation pine, live for two consecutive years, a total of 191.7 hectares of Korean pine, pine plantation accounted for 12.8% of the area. As we all know, korean pine live replanting than planting seedlings has the advantages of saving investment, simple and inexpensive. However, the broadcast of Korean pine after a long period of time after the growth of what exactly? Compared with the plant seedlings What are the differences? Live afforestation on Korean pine is