Plant ash is an alkaline fertilizer. Attention should be paid to the following four points in the process of use and preservation: First, ash is an alkaline fertilizer and should not be mixed with ammonium sulfate and ammonium nitrate. Ammonium sulphate, ammonium nitrate and ammonium bicarbonate are all ammonium nitrogen fertilizers. If they are mixed with ash, the nitrogen in the nitrogen fertilizer will turn into ammonia gas. When using ash in combination with acidic fertilizers, be sure not to mix them together. Second, plant ash should not be mixed with human waste, livestock waste. It is wrong for rural people to pour grass ash into pits or pigs for storage. Livestock urine, human urine, etc. is a delayed acidic nitrogen fertilizer, such as the alkaline ash is poured into acidic livestock manure, human waste, acid and alkali neutralize ammonia volatilization, thereby reducing fertilizer efficiency. When grass ash is mixed with livestock manure for 1 week, ammonium nitrogen in the excreta can be lost by more than half. The longer the mixing time is, the more nitrogen is lost. Third, nutrients in ash of plants are easily soluble in water. To preserve ash, they should be stored separately in shelters or shelters where ash or ash shelters are used to prevent wind and rain. After the rain, the ash will suffer serious losses. Fourth, plant ash can not be mixed and mixed with superphosphate, mixing will reduce the effectiveness of phosphorus.
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