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我场地处高淳、溧水、溧阳三县交界的丘陵地区。全年平均气温十五度,平均年降雨量一千一百毫米,无霜期二百三十天左右。 在伟大领袖毛主席革命路线的指引下,在农业学大寨群众运动的推动下,全场干部职工坚持以阶级斗争为纲,坚持党的基本路线,于一九七二年和七三年在大山工区营造了千亩杉木林。通过精心细致的抚育管理,大部分杉木长势良好,其中七二年营造的杉木目前平均树高二百七十公分。但是,从七四年开始,部分杉木受到叶枯痛的危害,发病较重的地块长势不良,黄枯平顶,少数渍水地段出现死树现象。为了确保大面积杉木幼林速生丰产。在县委的正确领导下,在省林科所的指导帮助下,我们对杉木叶枯病发生原因及其防治效果做了一些试验工作,取得了一定的成效,现将初步观察结果简述如下:
My field is located in Gaochun, Lishui, Liyang County at the junction of the hilly areas. The annual average temperature of fifteen degrees, the average annual rainfall of 1,100 mm, frost-free period of about 230 days. Guided by the great leader Chairman Mao’s revolutionary line and under the guidance of the Mass Education in Agriculture, the cadres and workers in the audience consistently adhered to the principle of class struggle as the key link and upheld the party’s basic line. In 1972 and in 1973, Dashan work area to create a thousand acres of fir forest. Most of the cedar is growing well through meticulous nurturing and management. Among them, the average height of the fir plantation constructed in 1972 is 270 centimeters. However, since 1974, some Chinese fir trees have been harmed by leaf blight. Badly-affected plots have been in poor conditions. Dead trees are found in the yellow-brown flat top and in a few waterlogging lots. In order to ensure large-area fast-growing young fir plantation. Under the correct leadership of the county Party committee, with the help of the guidance of the provincial forestry institute, we did some experiments on the cause of the blight of Chinese fir and its control effect, and achieved some results. The preliminary observations are summarized as follows: