How to do the rice soil testing and formula fertilization?
Soil testing and formula fertilization not only helps farmers to use fertilizers rationally, but also saves money and has a multiplier effect. It also greatly contributes to protecting the soil environment and ecological balance.
Rice soil testing and formula fertilization is the use of soil testing and formula fertilization meter to carry out basic analysis of soil nutrients, and then determine the use of fertilizer types, quantity, collocation, time waiting. It includes fertilization type, fertilization time, fertilization amount, fertilization method, and nutrient ratio. If any of these technologies cannot be implemented correctly, it will lead to a reduction in the economic benefits of fertilization. The following issues should be noted in the formula fertilization of rice.
1 At the same time as the formula fertilization of rice, combined with the application of organic fertilizer
Formula fertilization for rice generally refers to the application of chemical fertilizers, especially nitrogen, phosphorus, and potassium fertilizers. Therefore, formula fertilization must not be used as the only fertilization method for rice production. The nutrients needed for rice growth are various and there are a large number of elements. There are also trace elements in the medium-quantity element. In addition to the nutrients provided by formula fertilization, other nutrients have to be obtained by organic fertilizer or other fertilization methods. While formula fertilization, combined with the application of organic fertilizer, in the release of nitrogen, phosphorus, potassium and other nutrients, some trace elements are also dependent on the decomposition of organic matter released; second, organic fertilizer can improve the soil structure and solve the water and air in the soil The contradiction between them will increase the utilization rate of fertilizers. Third, organic fertilizers provide the carbon source needed for the propagation of soil microorganisms and create a soil environment that is suitable for the exuberant activity of microorganisms, thus ensuring the sustainable high yield and stable production of rice.
2 Application of formula fertilization should be combined with growth and uptake of rice
When formulating fertilization according to the rice yield target and soil nutrient status, it is necessary to pay attention to the application according to the absorption characteristics of each rice growth. During the entire growth process of rice, the general trend of the demand and absorption of nitrogen, phosphorus, and potassium is less in the early and late stages of growth, and more in the middle stage. In formula fertilization, special attention should be paid to the application of the critical period (seedling period) and maximum efficiency period (elongation period) of rice nutrition.
3 Combination of formula fertilization and cultivation management
Rice cultivation and management measures directly affect the absorption and utilization of fertilizers. First, suitable water conditions will increase the utilization rate of fertilizers. The lack of water and excess water will seriously affect the absorption and utilization of fertilizers. Second, management measures will have many impacts. Corresponding soil cultivation will reduce the loss of nitrogenous volatiles. Concentrated application of phosphate fertilizer can effectively reduce the amount of phosphate fertilizer fixed by the soil and increase crop absorption and utilization. Therefore, fertilization and field management must be combined.
The above fertilization methods are for reference only. In actual production, due to the long growth cycle of rice, soil fertility and planting levels are different, so fertilization techniques and methods will be different. In short, as long as we seriously according to the law of rice growth, due to soil When fertilizing, it will achieve a good yield increase.
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