1, variety selection. At present, the suitable varieties of late-season rice grown in Nanxian County are mainly Y-Yuyou 911, Huang Huazhan, etc. 2, the preferred sowing date, to ensure that the temperature is heading, moderate early harvest. According to the climate law of Nanxian County and Huanghua accounted for the growth period under different sowing dates, it is recommended that Y Liangyou 911 and Huang Huazhan planting period: First, planting before April 15th, and picking up flowers around July 15 before the onset of high temperature, Harvested before the end of August, this will enable the rice to be panned and flowered in the appropriate temperature period, and obtain the yield guarantee. It also leaves plenty of time for the roasting and cultivation of the vegetable moss. The second is to sow in the early June, and the middle and late August. Heading flowers are harvested in mid-to-late September. In the production practice, some farmers analyze the climate law of Nanxian County and do not understand the changes of growth period under different sowing dates of rice varieties. In order to pursue the early cultivation of vegetable moss, the rice varieties such as Huanghuazhan are blindly planted early to early May, and the results are 2010. In the year of 2016 and 2016, the rice was subjected to high temperature heading, and the yield loss was 20-40%. 3. Seed treatment. Before planting, use 60% of imidacloprid seed dressing per acre and mix 8-10 pounds of chest buds and mix well. How to use the seed dressing: Pour the dry and thrushed grain buds on the film, then mix well with 10g of seed dressing with 3-5 water, mix with one acre of field buds, gently Mix for 2-3 minutes, make the grain evenly spread (you can also put the liquid in the sprayer and spray it), then spread it out for about 6 hours or overnight to sow (the best time for seeding is the afternoon) 6-7 o'clock, spread out to dry in the evening, sowing the next morning). 4. Reasonable water management. In case of drought after sowing, you can 1-2 times of "horse water", promote a full seedling, Qimiao to a leaf and a heart, take the drying board to take root, ensure that the rain stays in the field; The principle of dew-based, dry and wet alternately, when the number of stems reached 250,000/mu, began to dry the field, the field was lightly and repeatedly divided into many times, and the sun was seen until the feet were not trapped. At the booting stage, the principle of “extractive irrigation combined with irrigation-based†is adhered to. The grouting to maturity is mainly based on resting irrigation, dry and wet, wet and root-protecting. 5. Scientific weeding. Adopt the "one, two kill, three supplements" grass control strategy. "One" is evenly sprayed with 30% acetochlor EC 100 ml/mu 1-2 days after sowing. It is necessary to keep the field moist during spraying and 5-7 days after spraying, but there is no water in the tank (that is, the soil moisture is saturated), and the seedlings can return to normal water after one leaf and one heart, so that Achieve the best weeding effect. "Kill" is the seedling in the 3 leaves 1 heart to 4 leaves 1 heart, after the field put dry water, with 20% bisyl ether 30-40 g / mu, evenly sprayed with 30-60 kg of water, after spraying 24 hours on a sunny day, 48 hours into the water on a cloudy day, the depth of the water is not drowned in the heart of the seedlings, and the water can be kept for 5-7 days. If the field has a malignant weed of thousands of gold, it should be sprayed with 100% per mu of 10% cyhalofopram. "Three supplements" is a field of S. serrata that occurs in the later stage. At the end of the seedling stage (before the jointing), it can be sprayed with 56% of dimethyl tetrachloride powder 50g/mu. In addition to controlling all kinds of broadleaf weeds, it can control the ineffective tillering, so that the young roots of the seedlings can be removed from the roots and greatly enhance the lodging resistance of the seedlings. However, it is necessary to pay attention to the use time of metformin powder. If it is used too early, it will cause no reduction of seedlings. If it is used in the third stage of seedling differentiation (50 days after sowing), the rice ear can not be pollinated. increase. As long as you master these points, you will be able to minimize the harm of grass damage to direct seed rice. 6, scientific fertilization. The use of "measured soil fertility balanced fertilization technology" to guide production, such as the tidal soil of Nan County in the north of Hunan Province, the general use of nitrogen is 28 kg / mu, base fertilizer: manure: panicle fertilizer is 5:4:1. The total phosphorus content is 16 kg/mu, which is used for the base fertilizer. The total potassium content is 14 kg/mu. The base fertilizer: manure fertilizer: the panicle fertilizer is 3:3:4. For the zinc-deficient soil, it is necessary to apply 400 g of large zinc. mu. Fertilization program: It is recommended to apply 30% of rice special formula fertilizer per mu to 30 kg as base fertilizer. The first time (weaning fertilizer) is 5-8 kg per mu, when the seedlings are 2 to 1 heart to 3 leaves. Large-grained zinc 2 packs (400 g); the second is in the seedlings 4-5 leaves, 10 kg of urea per acre, 51% of rice special fertilizer 20 kg. After re-watering in the field, look at the seedlings for 5-10 kg of urea per mu, and 10-15 kg of chlorinated agglutination. 7, prevention of pests and diseases. The common pests and diseases in Nanxian County mainly include rice leaf roller, rice stem borer, rice planthopper, rice locust, rice sheath blight, rice false smut, etc. It is recommended to control the rice during the growth period of rice and promote the technology of “three mixed insectsâ€. The specific scheme is as follows (the following is the dosage of the dosage of the mu). Before sowing, mix with 10g of 60% imidacloprid seed dressing; control the first time of pest control for 35-40 days, use 20% chlorantraniliprole 10g per acre + 80% fenpyridinone 8g +50 % hexaconazole 10 g; second: 50-60 days after sowing, 20% chlorantraniliprole 10 g + 80% fenpyridinone 8 g + 50% hexaconazole 10 g per acre Enemy or Zhuanggu Power); third time: from the break to the beginning of the ear, 20% chlorantraniliprole 10g per 80 acres + 80% fenpyridinone 12g + 50% oxazolol 10g (Or take the enemy or Zhuanggu power); if the rice planthopper and sheath blight after the emergence of the head and the prevention and control indicators, it is necessary to apply a rice planthopper and sheath blight drug 5-7 days after the heading. Note: 1 spray after dew on the field; 2 is best to use after 3 pm; 3 firstly convert the drug into mother liquor, then put it into the sprayer to spray the water better; 4 spray the field to maintain the shallow water layer . 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