The Influence Of The Molybdenum Nutrition Upon The Tobacco Nutritive Property Physiology Bio-chemical And Production Value Yield

In this paper, It sum up the preliminary research on effects of molybdenum in flue-cured tobacco varieties Yunyan85, K326, HongDa, CB-1 of studied in field and laboratory experiments. It related physiological and biochemical aspects of the principles and methods of tobacco, Analyzed and studied experimentally in flue-cured tobacco nitrate reductase activity and nitrate content, chlorophyll content, photosynthetic rate, baking process of polyphenol oxidase (PPO), Vc oxidase (AAO) changes in the activity and Vc content, yield, value and grade of flue-cured tobacco, Main Results as follows:1 Molybdenum can improve the fertility of tobacco pre-NR activity and reduced nitrate content in tobacco, the pro molybdenumtion of tobacco pre-birth body NO3--N of the absorption and transformation of tobacco to reduce the soil available N at late growth stage of the supply. Nitrate reductase (NR) activity in the whole process of growth and development of tobacco in the first lower increase in the maximum pre-vigorous growing stage long, vigorous growing stage stabilized after the late, and the leaf nitrate (NO3-N) content from Vigorous growing stage has been a long time to start gradually reduced and stabilized after matured.2 Molybdenum can enhance leaf photosynthesis and nitrogen assimilation capacity, cured tobacco leaf carbohydrate content and nitrogen compounds showed synchronous increase in leaf chlorophyll content decreased after the first increase in reduced late in the maximum long-vigorous growing stage value, enter the stage after a sharp decline, and finally stabilized, The photosynthetic rate was reduced after the first increase in the trend in the medium-term to achieve the greatest long-vigorous growing stage, matured later stabilized.3 Molybdenum baking inhibited the PPO activity in tobacco, baking the course of polyphenol oxidase activity (PPO) activity has been a downward trend, effectively prevented the tobacco brown reaction.Reduced the ratio of flue-cured tobacco diversicolor. In K326, the molybdenum and ammonium efficient facilities to deal with the proportion of mottled smoke were 2% and 3%, the ratio of the control handle 17% of the Yunyan 85, molybdenum and ammonium efficient measures to deal with the mottled smoke the ratio of 0 and 4%, the ratio of control to deal with 3% of the CB-1, molybdenum and ammonium efficient measures to deal with the proportion of the mottled smoke were 20% and 35%, the ratio of control to deal with 29% ,but molybdenum and ammonium efficient facilities to deal with the proportion of the mottled smoke were 8% and 14%, the ratio of control to deal with 16% in varieties HongDa.4 Molybdenum can promote the synthesis of Vc in flue-cured tobacco, an increase of curing tobacco ascorbic acid oxidase (AAO) activity. Baked in leaves within 72 hours of content Vc has been a downward trend, while the ascorbic acid oxidase (AAO) activity was bimodal trend, the first increase in the reduction and fertilizer spraying molybdenum obvious increase of the AAO tobacco baking activity, improved the baking quality of tobacco.5 Molybdenum spraying fertilizer, to coordinate tobacco plant metabolism to improve the tobacco plant botany traits, so that tobacco production, increasing quality. Widespread spraying ammonium molybdenum efficient than spraying tobacco production, output and level of impact, but were higher than the control. K326, the facilities and efficient production of molybdenum and ammonium, respectively, 4.2 percent high than that of the control and 1.6%, Yunyan 85, the facilities and efficient production of molybdenum and ammonium, respectively, 10.4% high than that of the control and 8.6%, CB-1, the Shi efficient production of molybdenum and ammonium were 1.4% higher than that of the control and 0.4%, safflower big gold dollar, the facilities and efficient production of molybdenum and ammonium were high compared to the control by 5.5% and 12.4%, K326, the efficient production of molybdenum and ammonium, respectively, 18% high than that of the control and 25%, Yunyan 85, the facilities and efficient production of molybdenum and ammonium, respectively, over control of 13% and 7%, CB-1 in high-performance molybdenum fertilizer 17% high than that of the control, the facilities and efficient production of molybdenum and ammonium, respectively, 9% high than that of the control and 16% in varieties HongDa.