First, increase potassium fertilizer. During the mid-growth stage of rice, it's the most critical period for potassium absorption, which also marks the peak of vegetative growth. Applying potassium at this time can offer several key benefits: (1) It helps maintain nutritional balance, promotes the development of young panicles, increases grain number and weight, and ultimately boosts yield. (2) It strengthens the rice stalks, thickens the epidermis, and enhances resistance to diseases and lodging. (3) It improves the rhizosphere environment, supports root respiration, and encourages the healthy growth of young panicles. The amount of potassium should be based on the available potassium content in the soil. For low-potassium fields (below 80 mg/kg), if 5–8 kg was applied during transplanting, another 5 kg should be added mid-season. If no potassium was used before transplanting, apply 10–12 kg per acre. For medium-potassium fields (80–100 mg/kg), a single application before transplanting or mid-season is sufficient, with 8–10 kg per acre. In high-potassium fields (over 100 mg/kg), potassium may not be needed or can be reduced. Potassium should be applied during and after the differentiation of the panicle. It can be applied alone or mixed with early panicle and nitrogen fertilizers.
Second, implement proper irrigation practices. To ensure optimal growth during the mid-season, three key measures are essential. First, maintain a consistent water layer, as this is the period when rice has the highest demand for moisture. Keep the field surface covered with water to ensure adequate hydration. Second, avoid excessive water depth—too much water can cause weak stems, thin internodes, fewer grains per panicle, and higher empty spike rates. During the panicle differentiation phase, shallow watering (5–7 cm) is recommended. Third, focus on soil aeration. This is also a critical period for root development, with roots growing deeper and producing more branch roots. However, high temperatures can lead to strong reduction reactions in flooded soils, producing harmful substances that damage roots, leading to root rot and early aging. Therefore, it’s important to maintain good soil ventilation while keeping the water layer. Methods include: 1) Using intermittent irrigation—flood the field, let it dry for one or two days, and repeat this cycle to balance water retention and aeration. 2) For fields with high groundwater levels and limited drainage, clear drainage channels to lower the water table and improve soil permeability. 3) For fields with heavy organic matter or root rot issues, extend the drying period to promote healthier root development and prevent further damage.
(Word count: 524)Butterfly Valve Flange,Butterfly Valve Flange Type,Butterfly Flange Valve,Flange In Butterfly Valve
Fuyuan Marine Accessories Co., Ltd , https://www.fymarineparts.com