The law of fertilizer requirement of rice

Rice can be said to be the largest food crop in China, and the staple food in most provinces is rice every day. Basically, rice is grown in all parts of our country. If you want to increase rice yield when planting rice, then fertilization is essential. When we fertilize rice, first of all, we need to understand the fertilizer law of rice. So today, the editor will give you a brief introduction to the fertilizer law of rice. Let's take a look at it.

1. Law of fertilizer requirement

There are more than ten kinds of nutrient elements needed in the whole growth period of rice. However, its absorption will be reduced due to a lack of soil supply. Among them, there are mainly three kinds of nutrient elements, such as nitrogen, phosphorus and potassium, and the absorption of nitrogen, phosphorus and potassium by rice will vary with yield and growth period. For example, the demand for nitrogen increases during the peak tillering stage and heading and flowering stage of rice. The application of nitrogen fertilizer at this time can improve the yield and quality of starch. If the nitrogen element is insufficient before heading, then the grain nutrition will be insufficient and the quality will be reduced.

2. Phosphorus absorption

The demand for phosphorus in rice is also relatively large, and we naturally can not ignore the supplement of phosphorus when applying fertilizer. However, the absorption of phosphorus by rice is not very different in different growth stages. The period with large absorption is generally in the tillering stage and young panicle differentiation stage. Phosphorus is very important to the growth of rice. It can not only promote the growth and development of rice roots, promote nutrient absorption, but also enhance the ability of tillering and improve the plumpness of grains.

3. Potassium absorption

Then there is the absorption of potassium. The absorption of potassium by rice is also very large. Generally, it is the main period of potassium absorption from panicle differentiation to heading and flowering. Then it is at the tillering stage and panicle differentiation stage. Potassium is an essential nutrient for rice to synthesize starch, cellulose and transport nutrients for rice plants. It can improve the root vitality, delay the senescence of leaves and improve the ability of resistance to diseases and insect pests.

4. Trace elements

In addition to the above common elements, silicon and zinc also have great effects on the growth of rice. The stems and leaves of rice plants contain about 15% of silica. Reasonable application of silicon fertilizer can enhance the ability of plant resistance to diseases and insect pests and lodging. In order to achieve the purpose of increasing yield, and can also play a role in improving the quality of rice. On the other hand, zinc fertilizer can increase the number of grains per panicle and 1000-grain weight, reduce the rate of empty grain, and increase rice yield, especially in calcareous alkaline soil.

The above is a brief introduction to the law of fertilizer demand for rice. That's all for today's introduction. This article is for reference only. I hope it can be helpful to everyone.