The ultra-high yield of rice refers to the actual requirement that the yield level exceeds the yield of rice per mu, which can reach 800-850 kg of rice. In order to achieve such high yields, farmers must strengthen the management of scientific cultivation during the planting process and improve the farming skills of farmers to ensure high yields for rice farmers. So for rice super high-yield cultivation techniques, you must know!
First, variety selection and environmental requirements
1, variety selection
Rice planting uses heavy panicle and medium panicle.
Variety: The grain size per ear is 2 - 18 million per grain, the grain number per pan is more than 80%, and the weight exceeds 27 grams.
Spike grain structure requirements: 200 grains per ear, 18-20 million, higher than the seed setting rate of 80%, grain weight 27 grams or more.
2, production environment
The average temperature is 21 - 27 degrees, the daily average solar radiation intensity is strong, the rice fields are open, there is no industrial pollution, and the ecological protection is good.
3. Soil requirements for soil
It has deep, fertile, aerated, water-permeable, fertile, fertilizer and fertilizer storage capacity.
Second, seedling and seedling management
1, seedlings
The rice seedling cultivation method is an important part of super high-yield rice cultivation, and the high-yield rice cultivation should adopt the highland method.
The leeward seedlings are selected from leeward, fertile and loose soils for irrigation of farmland or paddy fields with a groundwater level of less than 1 m. Acidic soil pH < 6.5. The selected seedlings were well cultivated and weeded from the box. The box was 1.2 meters wide and dug 40 cm wide and 20 cm deep.
In December of the previous year, according to the application of 5-10 kg/m2 of unified organic fertilizer on the soil surface, the decaying organic fertilizer was fertilized 20 days before sowing. Apply 10% square meter, 150 g / 150 - 60% potassium perphosphate potassium chloride 5 g / m 2 7 days before sowing, all mixed well. Covering the membrane, increasing soil temperature, accelerating fertilizer fermentation, and soil fertility. It is diluted with water of 2.5 g / m 70% sodium sulfonate 1.5 kg and diluted with water. It is made by mixing 1 g / m 50% phoxim with water to control underground pests.
At the end of March and early April, choose cloudy weather sowing, the temperature should not be lower than 10 degrees, then put the seeds in the soil 30 - 50 g / square meter, 80 - 100 g / square seedlings sprouted on the surface evenly, will The seeds are covered with fine soil. The seeds are not exposed and the soil moisture fully absorbs enough water.
One week prior to seeding the seedlings, an appropriate amount of rodent poison was used to prevent rodents. The sealed envelope is used to keep moisture. When the film temperature exceeds 35 degrees, the ventilation and cooling film are removed to prevent burning buds and 30 degree sealing and heat insulation. Remove the flat film in time and retain the vaulted cover film. In order to ensure a film temperature of 25 degrees, the film is covered in time at the end of the temperature from noon to afternoon. Keep the temperature at 20 degrees Celsius and choose a sunny night to keep the film temperature at 20 degrees.
2, seedling management
Seedlings grow to 1 leaf to 2 leaves, seedlings can be 5% or 15% water spray seedlings, promote seedling tiller; leaves 2.5 - 3, apply lactating fertilizer 1 time, can be mixed with 1% urea and 0.3% potassium chloride spray . Imidacloprid is added 5 kg per 30 g of water, and then fertilized once every 3 to 4 days to "graft fertilization, urea 3 kg / mu".
Third, farming requirements and fertilization
It is generally required that the three-plough plows are 16-20 cm deep, the fields are flat, the mud is rotten, the fertilizer is even, and the shallow water is excavated to facilitate irrigation and drainage of the paddy fields.
Fertilizers with high fertility apply 1000-1200 kg of farmyard manure, and medium-fertile rice fields apply 1300-1500 kg of farmyard manure.
The above is all about the super high-yield cultivation technology of rice, and more rice planting knowledge is in Huinong.com!
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