How good is the lodging resistance of the Zhaoyou 5431 rice variety?
Zhaoyou 5431 is relatively lodging resistant. Its plant height is about 117 cm, it is relatively sturdy, and it can ensure high and stable yields, with tolerance to fertilizer and resistance to lodging.
Key cultivation techniques for Zhaoyou 5431:
1. Sow at the right time to cultivate strong seedlings. Generally from early April to mid-May. Apply seedling-field fertilizer as appropriate. From the one-leaf-one-heart to two-leaf-one-heart stage, spray an appropriate amount of paclobutrazol to cultivate strong seedlings with tillers.
2. Transplant in good time and plant at a rational density: a seedling age of 25-35 days is suitable. Wide rows and narrow plant spacing are recommended, with a plant-to-row spacing of 4x9 cun or 5x8 cun, and 5-6 seedlings per hill (including tiller fertilizer), that is, 15,000-17,000 hills per mu, with 80,000 basic seedlings.
3. Scientific fertilizer and water management: apply sufficient basal fertilizer and increase phosphorus and potassium fertilizer. Fertilization should be heavy at the early stage, controlled at the middle stage (especially controlling the amount of nitrogen fertilizer), and supplemented at the late stage. Generally, apply 25 kg of 45% compound fertilizer per mu and 15-25 kg of ammonium bicarbonate, topdress 5 kg of urea within 7 days of transplanting, and topdress 7.5 kg of potassium fertilizer as booting fertilizer. Transplant in shallow water, keep the seedlings alive in 1-cun water, promote tillering in shallow water, head in deep water, drain the field at the right time, maintain water during flowering, and plump the grains with alternating wet and dry conditions. This combination has relatively large panicles and a relatively long grain-filling period, so water should not be cut off too early at the late stage; short water should be applied 5-6 days at the maturity stage, and the field should be kept moist until maturity.
4. Pest and disease control: carry out timely control according to local plant protection information. Focus on controlling rice leaf roller, stem borer, rice blast, rice false smut and other pests and diseases.
5. Harvest in good time, and pay attention to the threshing and drying method to improve rice grain quality.