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红松种子的种皮坚硬致密,不易透水透气,而且含有单宁,妨碍种子发芽。因此,催芽时间较长。大量种子集中在春季播种,时间紧任务重还和农业争劳力。遇到春涝春旱等不良天气,影响播种和发芽。1974年我圃进行了红松秋播试验,结果幼苗长势良好。这几年我圃大面积实行秋播。幼苗均生长整齐,健壮。我局有些林场的苗圃也推广了秋播,幼苗也生长良好。具体作法是: 每年7月末8月初将红松种子浸种消毒混二倍河沙置于空屋内,水分保持在60%,每隔一天翻动一次,进入10月份每周翻动一
The seed coat of Korean pine is hard and dense, impermeable to water and breathable, and contains tannin to prevent seed germination. Therefore, the sprouting time is longer. A large number of seeds are concentrated in the spring planting, the time is tight task and agricultural struggle labor. Encounter spring floods, drought and other unhealthy weather, affecting sowing and germination. In 1974 I nursery pine autumn broadcast test results seedlings grow well. In recent years, I planted a large area in autumn. Seedlings are growing neatly, robust. Some of my forest nurseries also promoted the autumn planting, seedlings also grow well. The specific practices are: the end of July each year in early August seed soaking pine seeds disinfectant mixed double sand River placed in empty houses, maintained at 60% water, every other day turn once into October per week a