经过连续3年对辐射松种苗特性及育苗技术的试验研究结果表明：2月底3月初播种的苗木比4月底5月初播种的苗木苗高多9．1cm，平均地径大0．16cm，出苗率提高35．6％；3月底4月初播种的苗木比4月底5月初播种的苗木苗高多6．1cm，平均地径大0．10cm，出苗率提高18．7％。%Three successive years of experiments and researches have been made on the seedling characteristics and seedling growth technigues of Pinus radiata. The results have shown that in contrast to the seeds sown at the end of April or the beginning of May, the seeds sown at the end of February or the beginning of March,have a higher average seedling height,increasing 9. 1 cm and a larger ground diameter, increasing 0. 16 cm,and their germination ratios increase by 35.6% ;In contrast to the seeds sown at the end of April or the beginning of May, the seeds sown at the end of March or the beginning of April have a higher average seedling height,increasing 6. 1 cm and a bigger ground diameter,increasing 0. 10 cm, and their germination ratios increase by 18.7%.
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