Special fertilizer for carbon-based and selenium-rich tea and preparation method thereof
A technology of selenium-enriched tea leaves and special fertilizers, applied in the field of special fertilizers, can solve the problems of low biological activity, large residual amount of inorganic selenium, and large toxic and side effects
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[0028] A special fertilizer for charcoal-based selenium-enriched tea leaves, which is composed of the following raw materials in parts by weight (kg):
[0029] Bio-black carbon 25, urea 40, ammonium dihydrogen phosphate 16, potassium chloride 20, binder 6, bone powder 2, ammonium sulfate 0.4, attapulgite 0.2;
[0030] Described binding agent is made up of the raw material of following weight part:
[0031] Japonica rice starch 40, selenium-enriched yeast 6, maltose 6, water 60, sodium selenite 0.004, potassium hydroxide 3, borax 0.4, tributyl phosphate 0.2.
[0032] The preparation method of described binder comprises the following steps:
[0033](1) Fermentation culture: Mix the japonica rice starch, selenium-enriched yeast, maltose, and water in the above parts by weight, and after culturing for 25 hours at a temperature of 31°C, divide the sodium selenite in the above parts by weight into 5 parts on average. Add a portion of sodium selenite in 3 hours, the total incubatio...
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