Buckwheat needs less fertilizer, but fertilizer is expensive.

Buckwheat has short growth period, rapid growth, slender stem and underdeveloped root system, so it is a kind of crop that needs less fertilizer. Generally speaking, for every 100 kg buckwheat grain produced, about 3.3 kg of nitrogen, 1.5 kg of phosphorus and 4.3 kg of potassium need to be absorbed from the soil. The specific amount of fertilizer application will vary with soil texture, cultivation conditions, climate characteristics, harvest time and productivity. However, for dry and barren land and alpine mountain areas, the application of fertilizer is the basis of high yield. Buckwheat fertilization should be based on the principles of "giving priority to base fertilizer, planting fertilizer as auxiliary, topdressing fertilizer as supplement", "organic fertilizer as main, inorganic fertilizer as auxiliary" and "cooperation of nitrogen and phosphorus". Skillful application of base fertilizer: base fertilizer is the basic fertilizer, also known as base fertilizer, which is applied to the deep layer of soil before buckwheat sowing. Generally, 2000-3000 kg of fully mature farm manure is applied per mu. The base fertilizer can be evenly applied to the topsoil before the last ploughing and preparation. Skillful application of base fertilizer can not only fertilize the soil, mature the soil layer, create high-yield conditions, but also effectively promote the growth and development of roots and improve the absorption function of roots. At the same time, it can make use of the characteristics of "whole fertilizer" and "steady strength" of organic fertilizer to realize balanced fertilizer supply during the growth period and ensure steady growth. Skillfully applying topdressing: topdressing is a rapid fertilization measure taken to make up for the deficiency of base fertilizer and seed fertilizer in the process of buckwheat growth and development. The absorption and accumulation of nutrient elements are different in different growth stages. after bud development, a large number of elements are needed, but at this time, the supply capacity of soil nutrients is very low, so skillfully applying topdressing to supplement a certain amount of nutrient elements in time, it plays an important role in promoting the growth of buckwheat stems and leaves, the differentiation and development of flower buds and the formation of seeds. "promote bud fertilizer" generally look at the seedling topdressing urea 3-6 kg per mu. Note: do not use those that are growing vigorously. The flowering period is the period when buckwheat needs the most nutrients. For those with general growth, we should pay attention to the timely supply of urea and other available nitrogen fertilizer, so as to improve the healthy flower rate and seed setting rate. "Flower-promoting fertilizer" generally sees that seedlings can apply 3-6 kg of urea per mu. It is best to choose cloudy days or sooner or later to apply fertilizer. In addition, for those who lack fertility or show de-fertilization in the middle and later stages, foliar spraying fertilizer can be applied 1-2 times. Generally, 50 kg of 0.2% potassium dihydrogen phosphate solution can be sprayed evenly all over the stems and leaves per mu.