Tianlongxiang 103 (formerly known as “Nongxiang 103â€) is the latest high-quality, fragrant rice variety cultivated in our province. In the fifth high-quality rice variety appraisal in the province, it was ranked second-class high-quality rice varieties in the province. This breed participated in the regional trials of late-night and late-maturing groups in Hunan Province in 2003 and 2004. The average yield per mu in the two-year regional test was 411.3 kg, and the growth period was 118.4 days, which was 3.0 days shorter than the control Weiyou 46. In 2005, it was approved by the Crop Variety Approval Committee of Hunan Province. The variety also has the characteristics of high yield, stable yield, strong adaptability and so on. To make full use of the variety's production potential, the following technical measures should be adopted: Selecting a good paddy field This variety is not resistant to rice blast, and should be planted in non-rice blast disease or light blast rice blasting areas, and should not be used in cold flooding or heavy-duty seeding fields. , heavy sticky field planting, in order to avoid the occurrence of early-stage zombies not found. The growth period of this species is longer and it is better to cultivate one-season late rice in the north of central Hunan. For the late evening cultivation, especially in the northern area of ​​Hunan, the former Changyi should be matched with early-maturing or middle-maturing early-maturing varieties to ensure that late rice is transplanted before July 18. About one week before the soaking, disinfection and soaking, the seeds are selected for sunny day so as to enhance the germination power and increase the germination rate. In combination with soaking, strict seed disinfection with strong chlorine fines prevents bastard disease and other pathogens from entering the field. Timely sowing, cultivation of many strong and strong Tianlongxiang 103 for a season late rice cultivation should be sown at the end of May or early June. It is better to use two-stage seedlings for continuous cultivation. Use a section of water for breeding and planting should be done before June 13th. The two stages of seedlings are suitable for sowing on June 11-12, and the amount of seedlings for Daechi is between 2 and 2.5 kg. It is advisable to send a ratio of 1:5 to 5.5 between Putian and Daejeon, and leave 0.18 to 0.2 mu of land per mu of Daejeon (including mailing fields). Seed management to ensure water conservation to promote seedlings, spraying one leaf at a time, "uniconazole" or "pacliazole", the specific amount of reference to the instructions. Use artificial "double two" mailing or floppy disk throwing. The suitable postage period is 1.7-2.5 leaves, which is 7-10 days after sowing. The density of manual insertion is 6.7 cm x 13.3 cm, with 3 to 4 seedlings per gram. The floppy disk has sent 38 floppy disks per acre Daejeon (561 holes per disk). It will send about 200 disks per mu, and the floppy disk will be seeded uniformly to ensure that the porosity is within 7%. To select and send paddy fields and to apply basal fertility to paddy fields, paddy fields with medium and high fertility levels should be selected, and 20 mu of livestock manure or 30 to 40 kg of dry cakes should be applied as base fertilizer per acre, so that intensive cultivation and flat land formation can be achieved. Post-stem maintenance of shallow water in the field to prevent sunburn, floppy disk thrown in the need to timely seedlings within 1 day after throwing. Posting (throwing) 3 to 4 days after the timely application of Miao Fei, topdressing urea and potassium chloride per acre of 3 to 4 kg, can be combined with topdressing herbicides. After 7-10 days, the seedlings per acre topdressing urea 2 ~ 4 kg, potassium chloride 3 ~ 5 kg, to ensure that the seedlings early onset but not too busy growth. Timely prevention and control of diseases and pests such as rice thrips, rice stem borer, rice stem borer, rice sheath blight, rice blast, etc., so that seedlings will be brought to the field when transplanting rice seedlings. Transplanting in a timely manner, timely and early planting of reasonable and dense planting is the premise to seize the high yield and stable yield of the variety. Within a period of 30 days or less, it is better not to exceed 35 days. Within two days, the maximum age is not more than 38 days. Density of 16.7 centimeters x 20 centimeters or not less than 18,000 centimeters per acre is appropriate, to ensure that the basic seedlings about 100,000, usually the original transplanted with mud. Appropriate fertilization, promote the growth of the species before the control is more lush, delayed tiller rate of the tiller is low, effective delivery is terminated early, must be sufficient number of seedlings before August 5, and appropriate control of the growth of the medium-term, to prevent the growth of the inverted three-leaf Overwhelmed. The fertilization principle of “Fertilizer base, fertilizer speed, and panicle fertilizer stability†should be adopted. Generally, about 12 kg of pure nitrogen is applied to paddy fields with medium fertility, and organic fertilizer accounts for more than 30% of total nitrogen. Studies have shown that increasing organic fertilizer can significantly improve rice quality. On the basis of returning straw to the fields, 15 to 20 mu of manure excrement or 40 kg of dried tortillas, 30 kg of Ammonium Bicarbonate and 30 kg of phosphate fertilizer are used as base fertilizer. 4 to 6 days after transplanting, 7.5 kg of urea and potassium chloride were applied as topdressing. Young spike differentiation 5 to 6 seedlings to see seedlings urea 1.5 to 2 kg, 3 kg of potassium chloride for panicle fertilizer, full ear per acre spraying "grain full" a package for foliar dressing. Scientific management of water, timely irrigation and drainage in order to adhere to the principles of deep-water living leeches, shallow moisture pods, enough seedlings to dry the fields, water heading, dry and wet seeds. When the total number of seedlings reaches 230,000 in general, the sun will start to dry, the drainage ditch will be well opened, and the sun will be dried to the middle of the plant. The specific conditions should also be considered according to the situation of the seedlings and the depth of the mud layer. Late dehydration should not be premature. Normally, the water should be cut off 7 to 10 days before harvest to allow it to dry naturally to ensure that the grain is full. The use of high-efficiency, low-toxicity pesticides to prevent and treat pests and diseases has poor resistance to rice blast and leaf blight, especially when planted in wards. Prevention should be strengthened. To reduce the number of pests and diseases, it is advisable to prevent rice blast and bacterial blight at the seedling stage, during the flood season, and during the break period. The use of high-efficiency, low-toxic, low-residue pesticides is prohibited. Chemical pesticides are strictly prohibited 15 days before harvest to ensure the hygienic quality of rice. Timely harvesting, prevention of mixing when about 40 days after heading, or when 90% to 95% of the grains are ripe yellow, select sunny harvesting and timely drying in storage to ensure that it has good processing quality, and it is not appropriate to use panicle harvest After mechanical thrashing threshing. When harvesting, pay attention to singles, single drying, and single storage to ensure the purity of high quality rice. (Hunan Rice Research Institute)
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