Rice is a high-yield fertilization method for rice fertilization. Rice is one of the main food crops in China. For high yield of rice, fertilization is very important. In the process of rice reproductive growth, carbon, oxygen, hydrogen, nitrogen, phosphorus, potassium, calcium, Magnesium, sulfur, trace elements are iron, manganese, molybdenum, and special elements are 16 elements such as silicon. The dependence of rice on soil fertility is closely related. The higher the soil fertility, the greater the proportion of soil supply nutrients.
The high-yield fertilization period of rice can be divided into four stages: base fertilizer, tiller fertilizer, panicle fertilizer and grain fertilizer. The fertilizer applied to the soil before transplanting rice is the base fertilizer, and the base fertilizer should be combined with organic fertilizer to achieve the effective tillering period. It has a high supply of quick-acting nutrients and a long-lasting effect. It is also possible to appropriately apply farm organic fertilizer to improve soil aeration, water absorption and water retention characteristics, and promote stable growth of rice plants.
The tillering period is an important period to increase the number of roots. It is advisable to apply the manure fertilizer early on the basis of applying the base fertilizer, promote tillering, increase the rate of ear formation, and increase the effective ear. It is usually applied half a month after transplanting or transplanting. According to the period of top dressing and the role of the fertilizer, it can be divided into flower-promoting fertilizer and flower-preserving fertilizer. The flower-promoting fertilizer is applied during the coke differentiation stage to the floret differentiation stage. In this stage, nitrogen application promotes the differentiation of branch stems and spikelets. Increase the number of spikelets per panicle.
The flower-preserving fertilizer is applied slightly before the meiosis stage of the pollen cells, which prevents the degradation of the floret and increases the accumulation of the storage of the stem and sheath. In production practice, panicle fertilizer generally does not promote flower fertilizer and flower fertilizer. Granular fertilizer has the function of prolonging the leaf, increasing the photosynthesis intensity, increasing the grain weight and reducing the empty granules. Especially for rice fields with small populations and varieties with large panicles and long filling period, it is more meaningful to apply granular fertilizer.
Appropriate application of nitrogen fertilizer in rice can promote the growth of rice plants, but excessive application will not only cause inefficient tillering, greening, lodging, and intensification of pests and diseases, but also lead to more empty mites, lower seed setting rate, and affect rice yield. Therefore, attention should be paid to controlling the amount of nitrogen fertilizer during the growth and development of rice. In the medium term, pay attention to drainage and fertilizer.
Phosphorus and potassium fertilizer is an indispensable element for rice growth and development. It can enhance the activity of plants, promote the synthesis and operation of nutrients, enhance photosynthesis, extend the functional period of leaves, and make the grain full and full, and increase yield. Trace elements such as zinc, manganese and boron can improve the supply of oxygen in rice roots, enhance the resistance of rice plants, improve the disease resistance of plants, promote the development of roots in the later period, and prolong the functional period of leaves, thereby increasing rice yield.
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