摘要
Abstract
[Objective]The purpose was to study the metabolism rule of chemical components in flue-cured tobacco materials from different el evation, and discuss the internal physiological changes during its growth period.[Method]High, middle and low three elevations typical to bacco leaf production area in Bijie Region was as follows: Jinsha County in low elevation area(840 meters) , Dafang County in middle eleva tion area(l 430 m) , Weining County in high elevation area(2 100 m). Single factor randomized block design was used with three repeated.[Result]The results indicated that after transplanting 50 ?95 days, the metabolism rule of the chemical compositions of the flue-cured tobacco leaves from different elevations were not completely same. Thereinto, in low elevation, tobacco leaves' chlorophyll a, chlorophyll b, violaxan-thin, xanthophyl, ?carotene, amino acid content and sugar alkali ratio showed a linear downward trend; In middle elevation, tobacco leaves' amino acid content showed a linear downward trend, while sugar alkali ration and chlorophyll a, chlorophyll b, violaxanthin, xanthophyl, B-carotene content firstly increased then decreased; In high elevation, tobacco leaves' sugar alkali ration, and xanthophyl and ?carotene con tent showed a linear downward trend, while chlorophyll a, chlorophyll b, violaxanthin content firstly increased then decreased, amino acid content firsdy decreased then increased finally decreased. After transplanting 95 days, chlorophyll a, chlorophyll b, carotenoid and amino acid content of tobacco leaves had positive corelation with elevation; reducing sugar content and sugar alkali ration had negative corelation with ele vation ; starch and nicotine content were the most medium in low elevation, while too high or too low in high and middle elevation. In the dif ferent altitudes, the change law of neoxanthin, reducing sugar and nicotine content of tobacco leaves in different elevation was same, therein to , neoxanthin content firstly increased then reduced, reducing sugar content showed a linear decrease trend, nicotine content increased steadi ly , but starch content' s change law was different.[Conclusion]The study provides a reference for confirmation of distinctive tobacco leaves' quality in different elevation ecological region of Bijie City.关键词
低温弱光/茄子/生长/生理指标Key words
Low temperature and poor light/Eggplant/Growth/Physiological indices分类
农业科技
