1. Boiling water to germinate: Put the selected seeds into boiling water and stir for 1 minute. Add cold water immediately. Adjust the temperature of the water to 40°C and soak for 2-4 hours. Remove the swelled part of the seed and un-swelled seeds with 40- 50°C water, soaked and swollen, remove, stuff cover stuffy for 12h, sow when sprouting.
2. Mechanically rub the seed coat: The seed is quickly ground with stone for several times, so that the outer seed coat is changed from a brownish-glossy-glossy to a grayish-brown, with a degree of coarseness, so as to facilitate the expansion of the seeds. The seeds can also be mixed with 2 times the fine sand rubbing, when scratching the seed coat, you can sand seed.
3, acid treatment: the old hard seeds, can be used 70% -80% concentrated sulfuric acid solution soaked for 3-5 minutes, remove the rapid flow of water for half an hour after sowing, this method can destroy the hard seed coat, germination rate of 90 More than %, but use caution.
2. Mechanically rub the seed coat: The seed is quickly ground with stone for several times, so that the outer seed coat is changed from a brownish-glossy-glossy to a grayish-brown, with a degree of coarseness, so as to facilitate the expansion of the seeds. The seeds can also be mixed with 2 times the fine sand rubbing, when scratching the seed coat, you can sand seed.
3, acid treatment: the old hard seeds, can be used 70% -80% concentrated sulfuric acid solution soaked for 3-5 minutes, remove the rapid flow of water for half an hour after sowing, this method can destroy the hard seed coat, germination rate of 90 More than %, but use caution.
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