为了加速荒山绿化,改良天然牧场,大面积地建设人工牧场,我们于1680年6月8日～8月11日曾五次用WFB—18型机动喷粉器(东方红18),在荒山、林地、沟坡进行了牧草种子喷播试验。现将试验结果介绍如下: 一、试验区的自然条件 试验地点在喀左县甘招公社西沟大队,为大凌河低山丘陵区,土质瘠薄,植被稀疏,属于半干旱草原类型,年平均温度8.3℃,无霜期140天,年平均降雨量500毫米,干燥度1.2。去年发生了历史上罕见的干旱,甘招公社是全县旱情最严重的公社,而 In order to accelerate the afforestation of barren hills, improve natural pastures and build artificial pastures on a large area, we used the WFB-18 type mobile duster (Dongfanghong 18) five times on June 8 to August 11, 1668, Woodland, ditch grass forage spray test. The test results are as follows: First, the natural conditions of the test area Test site Ganzhao County Gansu Commune Xigou brigade, Dalinghe hilly areas, infertile soil, vegetation is sparse, belong to the semi-arid grassland type, the annual average Temperature 8.3 ℃, frost-free period of 140 days, the average annual rainfall of 500 mm, the dryness of 1.2. Last year there was a rare drought in history, and Ganzhao Commune was the commonest commune in the drought-hit county