关键词: 基因多态性, 基因多态性, 单基因病, 多基因病, 相关性, 牛

Abstract:

Abstract Continuously three years use the method which in the green manure - tobacco - paddy rice crop rotation field localization experiment and the room analyzes unifies, the research green manure also field to enhance the soil fertility and the Leaf tobacco yield, the quality and the latter stubble crops late rice yield function, obtain the good effect. The green manure also field its nutrient release may obviously enhance the soil available nutrient of nitrogen phosphorus potassium nutrient content, the promotion flue-cured tobacco adult plant to the soil nutrient absorption use, obviously enhances the leaf tobacco output.Also the improvement leaf tobacco quality, its leaf tobacco outward appearance performance is loose for the structure, the maturity is good, gloss, the color is even, varicolored few. Three year result statistics, the perennial ryegrass area leaf tobacco average yield is 2644kg/hm2, the rape area leaf tobacco average yield is 2626kg/hm2, separately increases production 14.6% compared to the comparison, 14.1%.On, the medium leaf tobacco proportion respectively is 92.1%, 93.6%, the leaf tobacco intrinsic chemical composition close or achieves the high quality leaf tobacco standard.The latter stubble crops late rice separately increases production 43.2% compared to the comparison, 29.6%.