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调查区分布在溧阳县13个公社及1个国营林场的丘陵山区.该区年降水量1100毫米左右,年平均气温15.7℃.全年最高气温出现在7月,最高气温37℃;最低气温在1月·达-8.4℃.总日照2111.7/小时,辐射总量114.8千卡/平方厘米.调查地大部分立地条件较好,但局部地块也有含石率较大等不利条件.调查方法采取逐决随机抽样调查,按行数计不少于5%.调查时间在1983年,并分二次进行,第一次在4月中旬至下旬,第二次在7月中、下旬,以观察苗高与成活率、生
The survey area is located in the hilly and mountainous areas of 13 communes in Liyang County and 1 state-owned forest farm, with an annual rainfall of about 1100 mm and an annual average temperature of 15.7 ° C. The highest temperature in the year occurred in July and the highest temperature was 37 ° C. January-up to -8.4 ℃. The total sunshine 2111.7 / hour, the total radiation 114.8 kcal / cm. Most of the survey site site conditions are better, but the local block also has stone containing rate and other unfavorable conditions. Survey method to take Routine random sampling survey, according to the number of rows of not less than 5% .Investigation time in 1983 and divided into two, the first in mid-April to late, the second in mid-July, late to observe Seedling height and survival rate, students