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黑胡桃种子催芽需要时间过长——180-200天。这种方法有许多弊病。1973-1974年,作者对1972-1973年采集的Ⅰ、Ⅱ级黑胡桃种子进行了水烫处理试验。木桶装满种子,灌注热水(80-90°)浸泡一昼夜。然后将种子混上泥炭小片或河沙装入木箱(一份种子对2份泥炭或沙),存放到温度10-12°的库房。每周搅拌并用热水(40-50°)浸湿种子一次。待35-45天芽即发齐,播种前处理结束。条一带播种。生长期内进行4-6次抚育(松土除草)。试验表明,黑胡桃种子水热处理方法比常规方法缩短了4/5的时间,苗齐而且标准苗平均产量大大超过规定标准。苗木能以顺利木质化,避开了低温危害。1年生苗木平均高43厘米,根径0.6厘米。最近两年,移植苗和幼林长势很好而且稳定。
Black walnut seeds germination takes too long - 180-200 days. This method has many drawbacks. From 1973 to 1974, the authors conducted water scalding tests on Grade I and II black walnut seeds collected from 1972 to 1973. Barrels filled with seeds, perfusion hot water (80-90 °) soak for a day and night. The seeds are then mixed with peat pieces or river sand into a wooden box (one seed for 2 peat or sand) and stored in a warehouse at a temperature of 10-12 ° C. Stir weekly and soak the seeds once with hot water (40-50 °). 35-45 days until the buds hair Qi, sowing before the end of treatment. Strip sowing. Grow 4-6 times during the breeding (soil weeding). Tests showed that the black walnut seeds hydrothermal treatment method than the conventional method to shorten the 4/5 of the time, Miao Qi and standard seedlings average output greatly exceeded the required standard. Seedlings can be successfully lignified, to avoid the dangers of low temperature. The average annual seedling height 43 cm, root diameter of 0.6 cm. In the last two years, transplant seedlings and young forests have grown very well and are stable.