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 Taxus chinensis 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, their Hypocotyl dormancy can be released. After sowing in late winter or early spring, radicle dormancy can be broken after 2 months or so when the temperature is above 25 degrees Celsius, and the seeds can sprout.
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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 seeds can be repeatedly rubbed with coarse sand and soles on rough cement ground, the inconspicuous tough seed coat will be worn out and the hard seed shell will be thinned (
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Cultivation techniques of Taxus mairei
Taxus, also known as yew and red cypress pine, is an ancient tree species relic in the Quaternary ice age. There are 11 species of yew in the world, and there are 5 species in China, namely, Taxus mairei, Taxus yunnanensis and Taxus mairei Xizang. The biological characteristics of Taxus have high requirements on the ecological environment. Generally, adult trees need to grow for 100 ∽ for 250 years. Taxus is a precious plant on the verge of extinction. China has listed it as a first-class rare and endangered plant, and logging is also prohibited by the United Nations. Statistics in 1996 showed that wild yew in Yunnan accounted for 55% of the country's total.
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