Study On Corresponding Cultivation Technology Demonstration And Extension Of Yunyan 202

Longyan, that is located in the northwest of Fujian, is one of the three major tobacco-growing areas, and it is also a raw material base of high quality cigarette of our country. Flue-cured tobacco is the main tobacco type, as well as the staple field crop in Longyan. In order to effectively solve the problems of major cultivars unitary,,reserved varieties scarcity and technique service lag,which exist in flue-cured tobacco production in Longyan.This paper makes a summary to all kinds of technical measures from the introduced Yunyan 202 of tobacco area, supervises corresponding cultivation technique standard for Yunyan 202 in Longyan tobacco area,and according to the standard to popularizing demonstration. Finally, it puts forward the countermeasures about extending tobacco culture technology research in Longyan tobacco area and generalization ability. The conclusions are as follows:In the aspect of corresponding cultivation technique standard for Yunyan 202,This research has such conclusion, improved variety is the most important condition for tobacco production development.It is directly related to one of key techniques to choose cultivated varieties suitable for the local ecological and production. Improved variety needs good method, in order to guarantee improved variety to give full play to it's superiority. Therefore, Longyan tobacco area, combining with the comprehensive performance,selects the suitable variety-Yunyan 202, on the basis ofthe soil and climatic characteristics,and the occurrence,infection and epidemic of main diseases and pests;and according to the tobacco industry puts forward the requirement of the tobacco leaf quality and the hierarchical structure. Moreover, research,summary and popularization appropriate cultivation technique is important for ensuring the relative stability of tobacco leaf quality and the quality feature of regionalism.The article summarizes the corresponding cultivation technique of the new variety flue-cured tobacco-Yunyan 202:(1) choosing the suitable ecological environment; (2) adopting the seedling technique of moisture holding; (3) rephrasing water management; (4) rational nitrogen requirement and nitrogen phosphoris and potassium fertilizer ratio, such as in the fertilization level,pure nitrogen is 8.5kg/666.7m2, the ratio of NPK is 1:0.8:3; (5) appropriate the application rate of sulphur fertilizer,that is the most appropriate sulphur fertilizer for the flue-cured tobacco in Longyan tobacco area is in the range of 4.50g/m2-7.50g/m2; (6) paying attention to the integrated control of diseases and pests; (7) reasonable close planting and the numbers of leaves remained, that is planting density is row spacing 110cm×120cm, plant spacing 50cm×55cm, planting quantity is 16500-17250 plants/hm2, adopting the topping stage of fixed leaves,the numbers of leaves remained is 18-20 pieces; (8) harvesting at the ripe stage,that is, early gathering lower leaves at the proper mature stage,gathering middle leaves at the mature stage, gathering upper leaves at the fully mature stage. (9) matching baking technology should adopt three-section technology pattern.In the aspect of popularizing demonstration corresponding cultivation technique, from the main agronomical characters of each varety in test, the stem height of Yunyan 202 is the highest, up to 103.77cm; the number of leaves is also the most, up to19.33 pieces; stem thickness is also the thickest, up to 9.2cm.The plant shape is cylinder-shaped;the leaf shape is long ellipse shape;the color of leaves is deep green;the leaf surface is wrinkle; the leaf tip is blunt point; the leaf edge is wave-shape;the angle between leaf and stalk is big;the uniformity of growth is good and growing vigorously. From the investigation of diseases and insect pests occurrence Yunyan202 resists TMV,CMV. From appearance quality requirement,the overall representation of Yunyan 202 is the best.In the aspect of the countermeasures about extending tobacco culture technology research in Longyan tobacco area and generalization ability. Under the new situation of the production and development of Longyan Flue-cured tobacco, this paper proposes accelerating the cultivation technology of flue-cured tobacco on the basis of scientific and technological progress; accelerating the extension of the new cultivation technology based on market needs; implementing pollutant-free cultivation on the goal of sustainable development; impelling the four measures of standardization production on the goal of industrialization.