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:辽宁省章古台从 1994年开始引种铅笔柏 ,进行育苗与造林试验。试验认为 ,铅笔柏种子处理需要从 1月下旬至 4月下旬 90d左右时间 ,出芽率较高 ;而从 3月下旬至 4月中旬开始处理的种子 ,低温阶段时间短 ,出芽率低。铅笔柏越冬干梢与种源关系很大 ,美国南达科他洲种源基本不受冻害 ,而安徽种源干梢较重 ,不宜直接引种。铅笔柏在水肥条件充足条件下 ,生长很快 ,4年生苗高达 1.0 5m比樟子松大 4 9%
: Zhanggutai of Liaoning Province introduced the Penaeus alba in 1994 to carry out nursery and afforestation experiments. According to the experiment, the seed germination rate of Penaeus japonicus was about 90 days from the end of January to the end of April, and the seed germination rate was high from the end of March to the middle of April. Pencil borer winter dry tip and provenance is very large, the United States South Dakota Island provenance basically free from frostbite, and Anhui provenance heavier, should not be directly introduced. Pencil cypress water and fertilizer in sufficient conditions, the growth quickly, 4-year-old seedlings up to 1.05m larger than Pinus sylvestris 49%