Sunning technology of hybrid late rice

In order to achieve high yields in hybrid late rice, it is crucial to manage the field drying process at the right time. This is a well-established practice. The following key points should be considered when managing the sun-dried field: **First, timing for seedling establishment** The tillering period of late rice is relatively short, and the effective tillering window is even shorter. Based on the growth characteristics of different hybrid rice varieties, the optimal time for planting varies. For example, mid-July is ideal for planting late-maturing varieties such as "Y Liangyou 1," "Yangliangyou 6," and "Zhongzheyou 1," which tend to have more effective tillers in late July and early August. Planting before mid-July for varieties like "Xinliangyou 6," "Y Liangyou 7," and "Q Excellent 6" allows for 3–5 days of multiple effective tillering in August. After the Great Heat period, planting late-maturing varieties like "Y Liangyou 8," "Y Two Superior 19," and "C Liangyou 1102" can lead to more effective tillering in early August. Early-maturing varieties planted before August 5, such as "T 15 Excellent," "Jinyou 433," and "Zhuliangyou 168," should have their fields drained by August 15–17 to promote better growth. **Second, managing uneven seedlings** When transplanting hybrid rice, the number of seedlings should be carefully managed to ensure an optimal balance between plant density and yield. From a high-yield cultivation perspective, the ideal seedling density is about 1.2 times the number of effective panicles. For late-maturing varieties, this translates to approximately 25–260,000 seedlings per mu (about 667 m²), while medium-maturing varieties should have around 23–240,000 seedlings, and early-maturing varieties should have 210,000–220,000 seedlings. Once these thresholds are reached, timely drainage of the field is essential to promote strong root development and prevent excessive waterlogging. **Third, light drying is better than heavy** Hybrid late rice is typically grown during high-temperature periods, and the transpiration rate is quite high. When drying the field, the principle of “light drying, not heavy” should be followed. This is especially important because hybrid late rice has well-developed roots, particularly in super rice varieties. The standard for field drying is: the soil surface should be firm, not muddy when pressed, and the field should not crack or leave footprints when walked on. If you can monitor the water levels and seedling conditions effectively, you can achieve better results with less effort, making the overall management more efficient and productive. By carefully following these guidelines, farmers can optimize the growth conditions for hybrid late rice, leading to higher yields and better-quality harvests. It's all about timing, balance, and understanding the specific needs of each variety.

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