Effects Of Sowing Time And Transplanting Methods On Growth And Quality Of Flue-cured Tobacco

To determine Wuping province best sowing time and transplanting way, to explore the effects of different climatic conditions on the growth and development of flue-cured tobacco, filter out suitable measures of local production of tobacco cultivation. The test is in Wuping county tobacco producing Zhongshan Station and tobacco station in Fujian Provincein 2014--2015, through the analysis of flue-cured tobacco at different growth stages under different seeding and transplanting time and transplanting climatic factors, agronomic traits, nutrient absorption, tobacco climate, dry matter accumulation, economic traits, chemical indicators and chemical composition of tobacco appearance quality and coordination to explore the effects of different climate and environment on tobacco growth and quality of tobacco. The results are as follows:(1) Tobacco root elongation, flourishing and maturing long-term average temperature increase with delayed sowing, early sowing treatment root elongation of average temperature below the temperature range suitable for the growth of tobacco and the United States, the average temperature of Zimbabwe root elongation. Each period rainfall with the sowing date postponed show an increasing trend. Sunshine, field of activity accumulated temperature ?10 ° C is similar to Brazil and Zimbabwe, the relative humidity is higher than the field of foreign high-quality tobacco. Each processing cosine values are higher than 98%, with higher climatic similarity, the second sowing date and quality foreign tobacco-growing areas like the highest, followed by the third sowing.(2) Large field growth of tobacco plants decreased with delayed sowing, late sowing process also shortens the flue-cured tobacco seedling and root elongation stage, under the membrane transplant treatment can promote faster hair early tobacco; November 25 sowing treatment plant height, stem Wai, number of leaves, each leaf area than other parts of the largest sowing treatment; membrane transplantation treatment agronomic traits indicators were higher than film processing. Zhongshan November 25 dealing with Yongping November 30 dry matter accumulation amount is greater than early sowing and late sowing, transplanting under the membrane is higher than the amount of bioaccumulation film transplanting and treatment among middle leaf dry matter accumulation of total accumulation in the largest proportion. (3) In tobacco early growth, air temperatures of late sowing are higher than other sowing process, and overall good agronomic traits suitable for early sowing and sowing; membrane under transplanting soil temperature, air temperature and soil moisture rates high volume in film processing, tobacco fields and play a role in water retention of soil moisture, and promote the tobacco leaves, stems, roots, parts of dry matter accumulation, increase tobacco girth and height. Overall soil temperature on plant height, girth, root dry weight and root length greater impact, low weight stems with soil environmental factors associated with the degree of gray relation analysis.(4) Early tobacco nitrogen and potassium absorption with increasing growth period postpone leaves for N, K absorption maximum, followed by the stem, and the lowest roots, stems and roots is less than the total absorption absorption blades of N, K absorption gentle process for the pre, post showed significant growth trend; different transplanting environment, no significant difference in pre-absorption, with the growth over time, under the membrane transplantation for N, K accumulation amount gradually higher than the lower membrane transplant, By transplanting the film promotes the absorption of tobacco on N, K.(5) Zhongshan November 25 sowing, Yongping November 30 sowing at the film composition at transplanting respectively, both in maintaining the proper production conditions, but also to improve the quality of tobacco leaf tobacco, the average price increase of tobacco, tobacco smoke and the superior superior smoke proportion. With total sugar and reducing sugar content after the sowing date postponed rising and falling trend of late sowing treatment of high starch content, early sowing treatment lowest potassium content, total nitrogen and nicotine content expressed as B1> B2> B3, presented decreasing trend; membrane transplantation handling chemical composition than the membrane suitable transplant, and the chemical composition of the coordination is better than film processing. Coordination aspect, B2T2 optimal coordination, early sowing of sugar processing base than potassium chlorine and late sowing treatment than low, reducing tobacco coordination, under the membrane transplant process sugars nicotine, nicotine nitrogen and potassium chlorine gifted than average the membrane transplanting. B2T2 processing B2 F and C3 F chemical composition of the coordination index CHI highest chemical best quality. The second sowing maturity, the leaf structure and identity score better than other treatments, higher tobacco appearance quality index, transplanted under the membrane to some extent enhance the aesthetic qualities of tobacco, Zhongshan November 25 sowing, sowing Yongping November 30 and membrane transplantation combinations tobacco appearance quality index of the highest, best quality tobacco leaf appearance.