Do quick-acting farmyard manure. Grass ash can be used as a base fertilizer and top dressing, especially suitable for cover fertilizer.
As a base fertilizer, the general dosage is 75 - 100 kg / mu. Sweet potato and potato use grass ash as base fertilizer, which can increase yield by about 15% ; tobacco can use grass ash as base fertilizer to improve tobacco leaf quality and yield. For top dressing, in the expansion period of sweet potato and potato, it can increase production by 10% - 15% . Covering seed fertilizer, when vegetables, tobacco leaves, cotton, sweet potato seedlings and rice breeding, put a proper amount of fresh grass ash on the seedbed, which can raise the ground temperature, reduce the rotten seedling caused by low temperature, and promote early emergence and strong seedlings.
Do high quality soil pesticides. After fresh ash screened in the morning dew sprinkled on crops aphids, spider mites on parasites, continuous 2--3 times at intervals of 3--5 days, aphids, spider mite control effect of up to 95% . When planting onions, garlic, and leeks, apply 50 kg of grass ash per acre of ditch , then cover the soil, and the root canal control effect can reach more than 90% . Combined with soil preparation before planting acres spread 50--70 Gongjin ash can control soil pests. Before the potato is planted, the potato buds are used to treat the wounds in time with the ash ash, which not only plays a role in bactericidal and disease prevention, but also has a good control effect on cockroaches. After transplanting tobacco leaves and Chaotian peppers , when the morning dew is not dry, the grass ash is removed and sprinkled once every 10 to 15 days, which can effectively control the mosaic disease of tobacco leaves and peppers. Spreading in wheat fields can inhibit the occurrence of rust and powdery mildew; the application of rice fields has better control effect against rice blast and bacterial blight.
Precautions for application. The vegetation ash contains calcium oxide and potassium carbonate, and is not suitable for application in saline soil. Apply as much as possible to potassium crops such as rapeseed, sesame, peanuts, potatoes, sweet potatoes, tobacco, tea, vegetables, etc. The plant ash can not be mixed with ammonium nitrogen fertilizer (ammonium bicarbonate, ammonium sulfate, ammonium chloride, etc.) and organic manure, manure and other organic fertilizers to avoid nitrogen loss. In addition, the leaf surface should be sprayed with freshly dried sifted ash, and applied before the dew is dry. For the foliar application, fresh and clean ash clarified liquid should be used to improve the fertilizer effect and increase the efficacy.
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