我场地处闽北山区。历来杉木育苗,均采用春播。播种时间一般在二、三月份。但这个时间播种,阴雨天较多,圃地土壤粘湿结块,筛土困难,影响育苗进度,常因此延误了播种时间。由于播种迟,苗木出土较晚,又遇上四、五月份阴雨连绵,幼苗纤弱,抗病力差,易遭猝倒病为害,使苗木大量死亡。同时,春季播种时,正是造林大忙季节,常出现育苗与造 My field is located in northern Fujian mountains. Traditionally fir nursery, are used in spring. Sowing time is generally in February and March. But this time sowing, more rainy days, nursery soil sticky caking, sieving difficult, affecting the progress of nursery, often thus delayed the sowing time. Due to late sowing, late emergence of nursery stock, but also in May and May, the continuous rain, delicate seedlings, disease resistance is poor, vulnerable to damping off disease, so that a large number of seedlings died. At the same time, planting in spring, it is a busy season afforestation, often nursery and made