Mid-stage fertility management of rice
First, increase potassium fertilizer. During the mid-growth stage of rice, it's the most critical time for potassium absorption, and this period is also when the plant needs the most nutrients to support its vegetative growth. Applying potassium at this stage offers several key benefits: (1) It helps maintain a balanced nutrient supply, promotes the development of young panicles, increases grain number, and improves grain weight, which ultimately boosts yield. (2) It strengthens the rice stems, thickens the epidermis, and enhances resistance to diseases and lodging. (3) It improves the rhizosphere environment, supports root respiration, and encourages the healthy development of young panicles. The amount of potassium fertilizer should be based on the available potassium levels in the soil. For low-potassium fields (below 80 mg/kg), if 5–8 kg was applied during transplanting, an additional 5 kg should be added during the mid-growth stage. If no potassium was applied before transplanting, then 10–12 kg per mu is recommended. For medium-potassium fields (80–100 mg/kg), one application of 8–10 kg per mu is sufficient—either before transplanting or during the mid-growth phase. In high-potassium fields (above 100 mg/kg), potassium may not be needed or can be reduced depending on the situation. Potassium fertilizer should be applied during and after the differentiation of the panicle. It can be used alone or mixed with early panicle and nitrogen fertilizers.
Second, implement proper irrigation. To ensure good growth during the mid-stage of rice, three main practices should be followed. First, maintain a consistent water layer. This is the period of highest water demand, so the field must have enough moisture to support the plant’s physiological needs. Second, avoid excessive water depth. Too much water can cause weak stems, thin internodes, fewer grains per spike, and higher empty grain rates. During the panicle differentiation stage, shallow irrigation—around 5–7 cm—is recommended. Third, pay attention to soil aeration. This is also a time of active root development, with roots growing deeper and producing more branching roots. However, high temperatures can lead to strong reduction reactions in flooded soils, creating harmful substances that damage the root system and cause root rot and early aging. To prevent this, proper aeration is essential. Methods include intermittent watering—flood the field, let it dry for a day or two, and repeat this cycle to balance moisture retention and oxygen supply. For paddy fields with high groundwater levels and minimal drainage, cleaning the drainage channels can help lower the water table and improve soil permeability. Additionally, for fields with large amounts of organic matter or straw, it's important to extend the drying period to prevent root rot and promote better root health.
(Word count: 526)Herb Cutting Machine is suitable for cutting traditional Chinese medicine slices. It can be used for mass production and small batch production of traditional Chinese medicine materials such as roots, vines, and leaves. It can also be used for slicing and shredding materials in industries such as food, aquatic products, and tobacco.
Herb Cutting Machine,Herb Slicing Machine,Dry Fruit Cutting Machine,Dry Tea Cutting Machine
WUXI DEIICHEN MACHINERY PTY.,LTD , https://www.dicmachine.com