The one-time end-use application of corn chemical fertilizer in dryland is to apply the fertilizer required for the whole growth period of corn to soil in the first stage of autumn tillage or spring plowing, and no technical measures need to be applied for top dressing in the middle stage of corn growth. It has changed the traditional fertilization scheme and is a fertilization method adapted to the development of dry farming and water conservation agriculture and the climate characteristics of the north. First, technical measures 1, the choice of fertilizer. In order to ensure that the post-maize growth is not de-fertilized, long-term nitrogen fertilizers should be used. Such as coating urea, coated urea, long-term ammonium bicarbonate and so on. In addition, it should be noted that the formulation of fertilizers makes nutrients more comprehensive. 2, application time. For the spring water-poor or lyrical plots, the method of spring application can be used; for the plots without irrigated conditions, it should be applied in autumn. 3, determine the amount of fertilizer. Formula fertilization according to yield target and soil fertility level, generally high fertility soil, plots with a yield of more than 750 kilograms per mu should be treated with 20 kg of long-acting urea, 25 kg of special maize fertilizer (or 15 kg of diammonium) and 1.25 kg of trace fertilizer. The medium fertility of the soil is about 600 kg per mu. Long-acting urea should be used for 25 kg, corn for 20 kg, diammonium 10 kg, and micro-fertilizer 1.25 kg. Low-fertilizer soil yields below 500 kg of land should be used long-acting urea 30 kg, 30 kg of corn-specific fertilizer, 15 kg of diammonium, 1.25 kg of micro-fertilizer. 4, application methods. Before the combination of autumn cultivated land or spring soil preparation, the fertilizer is evenly spread on the surface at one time, then plowing in time, rotary ploughing, and the applied in the autumn should be repressed twice in winter to play an important role in protecting the soil and protecting the manure. Second, the role and effect 1. The role of drought protection: As a result of one-time application of fertilizer, the number of tillage on the soil is reduced, water evaporation is reduced, and moisture is increased by 2-3%. In particular, it was cast in the autumn, and after winter snowfall, the water was stored and repressed. This prevented the drought caused by the spring season and caused wind damage, laying the foundation for spring planting seedlings. 2. After one-time application of long-term fertilizer, the crop does not need to be top-dressed, which simplifies production management, saves labor and labor, reduces labor intensity, and has won time for improving the family's overall economy. 3, improve the utilization of fertilizer, fertilizer effect, increase production and improve efficiency. As long-term fertilizers are applied to soil, they slowly decompose for a long time, release nutrients, and supply crops. This avoids the traditional methods of fertilization that can result in non-rainfall due to weather and drought, delay in farming time or concentrated nutrient enrichment, and increase fertilizer use efficiency. 10-15%. In general, the number of grains per ear increased by more than 20 grains, the grain weight increased by more than 20 grams, and the yield increased by 10-30%. Increased overall economic efficiency.
Astragalus Membranaceus, also known as Mianqi. Herbs perennial, 50-100 cm tall. The main roots are thick, woody, often branched and gray-white. Stems erect, upper branched, finely angled, white pubescent. Herbs perennial, 50-100 cm tall. It is produced in Inner Mongolia, Shanxi, Gansu, Heilongjiang and other places.
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The medicinal use of Astragalus membranaceus has a history of more than 2000 years. It has the functions of enhancing immune function, protecting liver, diuresis, anti-aging, anti-stress, antihypertensive and a wide range of antimicrobial activities. However, it is forbidden to use the evidence of excessive superficial pathogenic factors, stagnation of qi stagnation and dampness, stagnation of food accumulation, excessive heat and toxicity at the beginning of carbuncle or after ulcer, and excessive Yin deficiency and yang.