Detailed Explanation of the Latest Management Key Points for Rice during the Grain-Filling Stage
Rice is one of the main food crops, with an extremely large planting area. To achieve high yields in rice cultivation, every stage must be taken seriously, especially in the late growth stage during grain filling, when management is extremely important. So how should rice be managed during the grain-filling stage? Let's find out together with the editor.
1. Moist Irrigation
The heading and flowering stage is a period when rice is extremely sensitive to water, and the field must not lack water. The grain-filling stage is a period of high water demand for rice, but deep water should not be kept for a long time, as this accelerates the aging of leaves and roots. Shallow water irrigation should be adopted, using an irrigation method of alternating dry and wet with wet as the main approach, to achieve coordination of water and air in the field, maintain the vitality of roots and leaves, improve the seed-setting rate, and increase single-grain weight. Generally, water is cut off one week before harvest to facilitate harvesting.
2. Spraying Foliar Fertilizer
The purpose of spraying foliar fertilizer is to plump the grains, that is, to improve the maturity and fullness of the grains. From a quality perspective, it is not advisable to apply growth nitrogen fertilizers such as urea, but rather to advocate spraying nitrogen-free foliar fertilizer or rice-specific foliar fertilizer at the full heading stage. This can play a very important role in extending the vitality of rice roots, maintaining stem maturity, preventing lodging, improving quality, and increasing yield and milled rice rate.
3. Pest and Disease Control
The grain-filling stage of rice is also the peak period for sheath blight, rice blast, and the striped stem borer, so early prevention is necessary. However, when carrying out chemical control, care should be taken to avoid spraying during the heading and flowering stage of rice. At the same time, note that azole fungicides should not be used excessively during the heading stage of rice, especially when encountering low-temperature overcast and rainy weather and rice growth is inhibited, excessive application may affect rice heading and grain filling. When applying chemicals, the dosage should be strictly controlled, and blind application should be avoided.
4. Preventing Lodging
One of the main causes of lodging in production is improper fertilization, caused by excessive nitrogen fertilizer. Applying too much nitrogen fertilizer in the early stage leads to excessive growth, while fertilizer deficiency in the later stage causes premature aging, withered stems and leaves, improper irrigation, and pest and disease damage, all of which can lead to lodging. To fundamentally control lodging, excellent varieties should be selected, scientific fertilization should be practiced, and reasonable close planting according to variety characteristics, frequent shallow irrigation, and timely field drying should be used to improve all aspects of cultivation management.
The above is an introduction to the management key points for rice during the grain-filling stage. We hope it can help you. To learn more related knowledge, please stay tuned to us.