Study On Water-saving Irriagtion Of Flue-cured Tobacco In Yimen County

Continuous drought situation for Southwest tobacco-growing areas, in2010to2011in Yuxi City Yimen to K326flue-cured tobacco varieties for the test material, study the tobacco field to optimize irrigation methods and covering water cultivation techniques, through the study the following conclusions:1Tobacco fields to optimize irrigation methods studyIrrigation treatments can significantly improve the agronomic traits of the tobacco plant, which is the best furrow treatment effect, followed by alternating hole irrigation and furrow irrigation. Irrigation treatments cured Tobacco Growth is not obvious to the early dry matter accumulation into prosperous long-term future of each tobacco plant, root dry weight and root to shoot ratio significantly better than non-irrigation irrigation, among which furrow irrigation treatments work best. Slightly different impact of different treatments on soil moisture0-20cm,20-40cm of soil moisture content varies widely throughout the growing period, while little change in the40-60cm soil moisture content, can promote the appropriate amount of irrigation tobacco plant absorption of nutrients, in turn, affect the absorption of moisture. Greatly enhanced ability to furrow irrigation tobacco plant dry matter accumulation decreased water consumption is greatly reduced, and flue-cured tobacco to absorb water and nutrients. Irrigation treatments were able to increase Improve Flue reducing sugar, total sugar, reducing nitrogen compounds, K/Cl as appropriate. Tobacco chemical component indicators furrow irrigation most coordinate and suitability. After each irrigation treatment grilled tobacco various economic indicators are better than non-irrigation and irrigation treatments between Youyi furrow irrigation treatment is optimal. Flue-cured tobacco production output value increased with increasing irrigation amount, when irrigation volume reaches a certain level, it will put the tobacco quality formation of certain side effects.2Tobacco fields covering water retention technologyMulching on soil moisture is more obvious straw mulch to retain moisture, inhibit runoff Obviously, they can well absorb rainfall. Covering the cultivation of the growth period of the tobacco plant, plant height, stem girth, number of leaves, maximum leaf length and width of the agronomic indicators have significant role in promoting. The early growth and development in tobacco plants, mulching is better than straw mulch to maturity advantage began to weaken, contrary membrane is better than mulching. Covering the cultivation of tobacco plants can promote the absorption of nutrients, the promoting effect of straw mulch shoot dry matter accumulation in tobacco plant is superior mulching. Changes in water use efficiency performance superior to no better than mulching straw mulch membrane. Mulching cultivation can be improved in varying degrees of carbonaceous and nitrogenous compounds and potassium content of flue-cured tobacco, and better coordination of intrinsic chemical composition, mention potassium effect is obvious. Straw mulch optimal economic benefit, mulching followed membrane and not deal with differences is not obvious.