How does the seed of yew reproduce to break seed coat?
The method of seed reproduction and seed coat damage of Taxus chinensis is as follows: the seed has a long post-maturity period and dormancy characteristics, and can germinate only after two winters and one summer under natural conditions, that is, it can be frozen outdoors in winter, exposed to high temperature and rain in summer, sown in autumn of the following year, if sown in spring, it can still be frozen outdoors after winter, and sown in a greenhouse after germination from late March to early April. It can germinate more than 20 days after sowing. If the seed can be repeatedly rubbed with coarse sand and sole on rough cement ground, the inconspicuous tough seed coat can be worn, and the hard seed shell can be worn thin (do not wear the seed kernel), so that the seed can be easily permeable to water and air, and the seed germination can be faster.
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Propagation method of Taxus chinensis
First, a few years before sexual reproduction, the emergence rate of wild yew seeds sown was less than 10%. Scientific research has found that the dormancy period of its seeds is as long as several years. After outdoor variable temperature storage and the use of drugs to break seed dormancy, the emergence rate can be increased to more than 70% and 80%, making it possible for the sexual reproduction of Taxus mairei to break through difficulties and to plant seedlings in large quantities. 1. Collect the mature fruit from September to October, put it in the basin, add the right amount of coarse sand and water, and put it on the plank.
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How to change temperature for seed propagation of Taxus mairei?
The method of seed propagation and variable temperature treatment of Taxus mairei is as follows: Taxus seeds have the habit of double dormancy of radicle and Hypocotyl, and the radicle needs to go through the stage of high temperature above 25 degrees Celsius for one month to break dormancy. Hypocotyl needs to be at minus 3 degrees Celsius to minus 20 degrees Celsius for about one month. In order to accelerate seed germination early, as long as the seeds with damaged seed coat are mixed with wet sand and frozen in an environment below minus 3 degrees Celsius for 25 to 40 days, the Hypocotyl dormancy can be released after sowing in late winter or early spring.
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