撩壕整地对加速幼林生长、提早郁闭、加快成林成材具有明显的作用,凡有条件的地方可广泛应用。为了研究撩壕整地造林林木速生丰产的规律,总结经验,使之更好地运用到生产上,我们曾以怀集县林科所不同整地方式营造的杉木林为对象,进行了调查研究。一、自然概况怀集县林科所地处东径112°11′、北纬23°55′、海拔55.4米的丘陵盆地上,林地相对高度为20—60米。年平均气温20.8℃,绝对最高气温38.7℃,绝对最低气温-3.9℃。年平均降水量1,790毫米,4—6月降水量占全年的50%,10月至次年2月出现季节性干旱,降 Trenches site preparation to accelerate the growth of young trees, early canopy closure, to speed up forest into a timber has a significant role, where the conditions can be widely used. In order to study the law of fast-growing and high-yielding of tending soil preparation and afforestation, summarize experience and make it better applied to production, we conducted a survey and research on the Chinese fir plantation which was constructed by different land preparation methods in Huaiji County. First, the natural profile Huaiji County Forestry Branch is located 112 ° 11 ’east diameter, latitude 23 ° 55’, 55.4 meters above sea level hilly basins, the relative height of 20-60 meters of woodland. The annual average temperature of 20.8 ℃, the absolute maximum temperature of 38.7 ℃, the absolute minimum temperature of -3.9 ℃. The average annual rainfall of 1,790 mm, April-June precipitation accounted for 50% of the year, from October to February next year, seasonal drought, down