What to Note Before Transplanting Rice Seedlings

Rice cultivation is very common in southern China, and we all know that the staple food of southerners is rice. In fact, whether in the south or the north of China, the demand for rice is quite large, so rice is the most common and the largest in planting area among agricultural crops in China.

What to Note Before Transplanting Rice Seedlings

7-10 days before transplanting rice seedlings, apply phosphate fertilizer and organic fertilizer once. For each square meter of seedbed, apply 150-200 grams of superphosphate or calcium magnesium phosphate fertilizer and 250-300 grams of composted decomposed peanut bran. Stir the phosphate fertilizer and organic fertilizer thoroughly and mix evenly, then spread them evenly on the seedbed, and then sprinkle a small amount of clean water so that the fertilizer evenly falls into the soil around the roots of the rice seedlings and fully contacts the soil. After transplanting, the rice seedlings will produce roots early and quickly, have many fibrous roots and a developed root system, are easy to turn green, have strong seedlings, good tillering, and resistance to diseases and pests.

Notes for High-Yield Rice Harvest  

1. Drain early and try to drain the water in the paddy field as much as possible. If necessary, dig ditches to drain the water from low-lying areas early and dry the field.  

2. When more than 95% of the rice husks have turned yellow, the grains have set and hardened, and the rice grains are transparent, it can be harvested. For mechanical harvesting, it can be appropriately delayed by a few days.  

3. If the weather is clear or conditions permit, manual cutting and drying is best, as this can significantly increase the 1000-grain weight and increase yield. At the same time, the rice grain has good market quality and a high germination rate. If a harvester is used, it is best not to use a whole-feed harvester (many branches and stems, and husks are squeezed and broken).

Benefits of Rice Seedling Cultivation in Greenhouses  

1. Raising rice seedlings in greenhouses helps maintain the temperature inside the greenhouse. The day-night temperature difference inside the greenhouse is small, and the ability to buffer against adverse conditions is strong. Greenhouse seedling cultivation can be 5-7 days earlier than small-shed seedling cultivation, making full use of the accumulated temperature in early spring, and the seedlings develop fully.  

2. Improve land utilization and seedling utilization. Because the greenhouse has a large space and high surroundings, the seedlings grow evenly, there are no discarded marginal seedlings, and the seedling formation rate is significantly improved, reducing the seedling field area.  

3. The greenhouse has a large volume, large lighting area, good heat preservation performance, and even temperature inside the greenhouse, improving light energy utilization. In addition, it is convenient for ventilation, which helps hardening of seedlings.  

4. The quality of greenhouse seedlings is generally better than that of small-shed seedlings. Because the day-night temperature difference inside the greenhouse is suitable, it helps seedling growth and dry matter accumulation, improving seedling quality.  

5. Low seedling cultivation cost. Greenhouse seedling cultivation saves labor and seeds and is also conducive to seedbed management. Therefore, seedling cultivation and management can all be carried out inside the greenhouse, not limited by weather periods, reducing labor intensity.

Shallow-Wet-Thin-Dry Irrigation Technology for Rice  

1. Green-turning stage. The control of the shallow water layer at the green-turning stage depends on specific conditions. For older seedlings, the water layer can be deeper; otherwise, it can be slightly shallower.  

2. Late tillering stage. At this stage, the time and degree of field drying must be strictly controlled to give full play to the role of field drying. It should be neither too early nor too late. Drying the field too early will affect tillering, and drying too late will affect young panicle differentiation. The time for field drying should be from the late tillering stage to before young panicle differentiation. The degree of field drying should be decided by looking at the field, the seedlings, and the weather. At the same time, field drying should also be carried out in sections according to water source conditions and irrigation district canal conditions, to avoid drought caused by untimely irrigation after field drying, which would affect crop growth.  

3. Heading and flowering stage. Rice at the heading and flowering stage will reduce yield when encountering high-temperature weather. When the summer temperature reaches 35°C, it will affect pollination and fertilization of rice flowers, reducing the seed-setting rate and 1000-grain weight. To prevent damage from high summer temperatures, appropriately deepen the irrigation water layer.  

4. Yellow-ripening stage. At this time, dehydration should not be too early. Too early dehydration will make the soil dry, force maturity, affect full grain filling, and reduce rice yield. At the same time, water should not be too much, otherwise it will cause delayed maturity and an increase in green grains, and it is also not conducive to harvesting. Usually, the field should be drained dry, which is conducive to harvesting.

Rice cultivation is very common in China. Before planting rice, growers should learn more about rice cultivation methods and techniques. Moreover, with the continuous development of society and continuous progress of technology, the techniques and methods for planting rice are now becoming more and more advanced.