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1.油松育苗要采取增强早期木质化的措施 促进油松苗木早期木质化的措施是:①选用油松育苗的重茬地育苗,也可选用中性或微酸性的砂壤土,每亩施万斤厩肥或松林土。②种子混砂处理,苗木高、粗生长及抗病虫害情况均好于水浸催芽。当种子有50％冒出小白芽时立即播种,芽子过长则没有后劲。③间苗在小暑前后进行,每隔2指宽(4厘米左右)留一株,每平方米留350株。④立冬至小雪灌足防寒水,第二年清明至谷雨灌足开化水,以提高地温,促进缓苗。
1. Pinus tabulaeformis seedlings to take measures to enhance early lignification to promote Pinus tabulaeformis early lignification measures are: ① use Pinus tabulaeformis continuous cropping seedlings, but also the choice of neutral or slightly acidic sandy loam, per acre Shi Wan Kilo manure or pine forest soil. ② seed sand mixed treatment, seedling height, coarse growth and pest resistance were better than the flooding. When the seeds of 50% emerge small white buds immediately sown, too long buds no stamina. ③ seedlings before and after the small heat, every 2 fingers wide (about 4 cm) to leave a, leaving 350 per square meter. ④ legislation winter to light snow irrigation foot cold water, the second year Ching Ming Valley irrigation to open water, to improve the ground temperature and promote Huanmiao.