Effect of Nitrogen in Soil on Rice Growth
The production of rice is inseparable from nutrients. At each stage of rice production, we will apply fertilizer according to its growth characteristics and fertilizer requirements. Among them, nitrogen is one of the most important elements, and nitrogen provides necessary for rice production. Nutrients, rice lacking nitrogen are susceptible to reduced resistance, lodging, and reduced yield. The content of nitrogen in the soil can be measured and determined by a soil nutrient tester, and the content of nitrogen in the soil can be analyzed.
The main form of nitrogen in the soil is organic matter, which can be absorbed and used by rice after being decomposed (ammoniad and nitrated) by microorganisms and converted into fast-acting inorganic nitrogen. Nitrogen is the most important element in rice, and nitrogen has an important role in promoting the mulberry mulberry, growth rate, number of live seedlings and weight of single stem. In the sugarcane field, the effective nutrient that rice absorbs is a chemical form that is absorbed by the rice root at or near the root and soil interface and is a relatively simple dissolved state. The nitrogen element is mainly cationic (NH+a). And the anion nitrate (NO form of the rice is absorbed and utilized, and the soil is used as a nutrient pool to regulate the nutrient budget.
The soil nutrient tester used for analysis and comparison found that: per kilogram of pure nitrogen can increase 70-250kg of rice. However, the effect of increasing production does not increase linearly with the increase in the amount of fertilizer applied. When the application of nitrogen fertilizer increases to a certain level, there will be no increase in production but a downward trend. This is due to partial application of nitrogen fertilizer, causing imbalance in the proportion of rice nutrient elements, but to weaken the photosynthetic intensity, rice in the body excess nitrogen will become the basis of the disease, so that rice resistance is reduced, easy to cause diseases and insect pests, lodging, resulting in reduced production. Rational application of nitrogen fertilizer must also improve cultivation efficiency and promote photosynthesis by improving cultivation techniques and improving soil physical properties. In other words, rational fertilization techniques should be based on fertility and improvement of soil environmental conditions, and be closely coordinated with each other. The cultivation techniques and field management measures can give full play to the effectiveness of fertilizers to achieve high yields of rice.
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