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山海关杨系杨柳科杨属黑杨派速生树种,具有耐水湿,抗病能力强等特点。它是我省冀中平原和山坡地区的优良栽培树种。搞好山海关杨育苗尤其播种育苗,是大面积工程造林的基础。一、种子的采集。种子一般在6月下旬开始成熟,当蒴果的果皮大部分转黄,个别果皮爆裂时,即可采摘。用剪钩将小枝采下,然后摘取果穗,单层铺在帘子上,帘子下部垫好塑料布,用沙布遮罩,在阳光下曝晒。果皮全部爆开时,再用筛子揉搓,将种子筛选干净后,放于荫凉通风处以备播种。二、苗圃整地。选择有水源、耐涝的沙壤土地块为圃地。将圃地深耕细耙,耕前亩施磷酸二氮铵150千克。耕后做成长7米、宽1米、高0.3米的高床。撒呋南丹药土消毒,每床用药0.3千克。采用高床有
Yang Department of Shanhaiguan Poplar Yangliu genus Populus to send fast-growing tree species, with water-wet, disease-resistant and strong and so on. It is an excellent cultivation tree species in the Jizhong plain and hillside area of our province. Yang Shanmiao Shanhaiguan do a good job, especially sowing seedlings, is the foundation of large-scale project afforestation. First, the collection of seeds. Seeds generally mature in late June, when most of the pericarp of the capsule turn yellow, individual peel burst, you can pick. Use a hook to pick the twigs, and then pick the ear, single layer on the curtains, the curtains under the mat good plastic sheeting, sand cloth mask, in the sun exposure. Peel all burst open, and then rubbed the sieve, the seeds after screening clean, put in a cool and ventilated place for sowing. Second, nursery site preparation. Select a water source, waterlogging sandy loam plots for the land. Fine nursery plow will cultivate, cultivate before applying 150 kg of ammonium phosphate. Plow to grow 7 meters long, 1 meter wide and 0.3 meters high high bed. Saffron Nandan soil disinfection 0.3 kg per bed medication. With high bed there