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Soil testing is the premise of soil testing and formula fertilization. The analysis of soil nutrients by soil analyzer can accurately grasp the soil nutrient status and fertilizer supply performance, and provide scientific basis for formula fertilization; On the basis of soil testing, according to the soil characteristics, cultivation habits, crop manure requirements, production levels and climate conditions, combined with the previous year's yield level, determine the target yield, and then according to the effect of fertilizer, put forward nitrogen, phosphorus, potassium The most suitable amount and the best ratio; in accordance with the requirements of formula selection of high-quality single fertilizer or special fertilizer, compound fertilizer, organic-inorganic compound fertilizer and other fertilizer varieties for scientific matching; Fourth, fertilization mode. According to the soil type, the crop's fertility characteristics and fertilizer requirements, formulate the corresponding fertilization mode.
Early rice in Daejeon has more nitrogen absorbed from jointing stage to heading stage; more phosphorus and potassium are absorbed from heading to maturity. Before the heading, the proportion of N, P and K fertilizers to the total amount of fertilizers is larger, and they should be fertilized separately. Basal fertilizer is dominated by organic fertilizers, supplemented by chemical fertilizers. Organic fertilizer is a complete fertilizer containing various nutrients. In addition to nitrogen, phosphorus, and potassium, it also contains sodium, magnesium, sulfur, calcium, and various trace elements. Applying organic fertilizer can improve the ventilation performance of the soil and improve the performance of maintaining fertilizer and water. Promote the steady growth of rice plants, which is conducive to early rice to obtain high yield and quality. Farmhouse fertilizer must use mature farmyard fertilizers.
Through the determination of soil analyzers and the growth habits of early rice, it can be concluded that proper application of N fertilizer to early rice can promote the growth of rice plants. However, excessive application will not only increase the number of ineffective tillers, but also cause turbidity, lodging, and pests and diseases. There are many empty grains, and the fertility rate declines, affecting the early rice yield. Therefore, in the growth and development of early rice should pay attention to control the amount of nitrogen fertilizer. Phosphorus and potassium fertilizers are indispensable elements for the growth and development of early rice, which can increase the activity of the plant, promote the synthesis and operation of nutrients, strengthen photosynthesis, extend the functional period of the leaves, make the grain full and full, and increase production. Phosphorus fertilizer is suitable for basal fertilizer, potassium fertilizer is based on base and topdressing is better.
Application of Soil Analyzer in Soil Testing and Fertilization in Early Rice
In recent years, with the continuous development of precision agriculture, the utilization rate of chemical fertilizers and pesticides has also attracted considerable attention. In order to increase the utilization rate of chemical fertilizers, save the amount of chemical fertilizers and improve the quality of agricultural products, soil testing and fertilizer application technology has also been continuously promoted. . If we want to set production with soil, and produce fertilizer, the principle of balanced application of nitrogen, phosphorus, and potassium due to lack of supplements and deficiencies requires an effective measurement of soil nutrients. The soil analyzer plays an important role in soil testing and formula fertilization, and can effectively measure soil nutrients. In the process of cultivation of early rice, it is necessary to effectively measure the soil nutrients in the field by performing soil testing and formula fertilization.