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胡杨是盐碱荒漠地区不可缺少的优良造林树种之一,过去由于育苗难,在我区的沙荒和盐碱地发展很慢。1982-1983年我们在学习新疆育苗经验的基础上,在宁夏开展了胡杨播种育苗试验,取得了较好的效果。一、种子的采集和调制胡杨是雌雄异株,在宁夏7月下旬种子成熟。采种首先要选好母树。一般宜在立地条件好,雌雄混生的疏林中,选择10年生左右生长发育旺盛的母树进行采种,其中以早熟植株为好。当朔果颜色由绿变黄绿并微裂,种子呈肉红色时,应立即采种,及时调制,筛选,随即运回作播种用。
Populus euphratica is one of the indispensable afforestation species in the saline-desert regions. In the past, because of nursery difficulty, desertification and saline-alkali land in our region developed very slowly. From 1982 to 1983, on the basis of studying experience of seedling nursery in Xinjiang, we carried out the seedling raising experiment of Populus euphratica in Ningxia and achieved good results. First, the seed collection and modulation Populus is dioecious, mature seeds in late July Ningxia. Seeds must first choose a good mother tree. Generally should be good site conditions, mixed sparse alien, choose about 10 years of growth and development of the strong growth of mother trees for seed selection, of which premature plants as well. When the fruit color changes from green to yellowish green and microcracked, the seeds are reddish, should be immediately planted, timely modulation, screening, then shipped back for planting and sowing.