生態(tài)及栽培因子對白肋煙煙堿轉化的影響
Effects of Ecological and Cultivation Factors on Nicotine Conversion in Burley Tobacco
-
摘要: 通過若干栽培、調制因子和不同海拔,、光照條件對白肋煙煙堿轉化影響的試驗研究及生產(chǎn)取樣調查發(fā)現(xiàn),，在鄂西南煙區(qū)，隨著海拔高度的上升,，煙堿轉化率呈下降趨勢,，但海拔1 000 m 左右煙堿轉化率最低，煙葉質量最好,；充足的光照能明顯降低煙堿轉化率,；適當增大株距有利于降低下部煙葉煙堿轉化率，適當增大行距有利于降低上部葉煙堿轉化率,；上部葉煙堿轉化率隨著打頂時間的延遲呈上升趨勢,；下部葉在現(xiàn)蕾初期—現(xiàn)蕾盛期打頂，煙堿轉化率有所上升,，初花期打頂煙堿轉化率明顯下降,；留葉數(shù)與煙堿轉化率存在負相關關系，適當增加留葉數(shù)有利于降低煙堿轉化率,。整株或半整株采收晾制的煙葉煙堿轉化率較低,，摘葉晾制和摘葉劃筋晾制的煙葉煙堿轉化率較高。在白肋煙晾制階段,，晾房保持在中等濕度水平對降低中下部葉煙堿轉化率有利,，保持在相對濕度較高的水平對降低上部煙葉煙堿轉化率有利。Abstract: Effects of altitude, sunshine condition and some cultivation factors on nicotine conversion in burley tobacco were studied. Results showed that nicotine conversion rate declined as altitude increased in west Hubei and the best quality and lowest nicotine conversion rate appeared at 1000 m altitude. Plenteous sunshine could distinctly decrease nicotine conversion rate. The increasing plant space was in favor of decreasing nicotine conversion rate in low leaves and the increasing row space was in favor of decreasing nicotine conversion rate in upper leaves. The nicotine conversion rate in upper leaves increased as topping period delayed. The nicotine conversion rate slightly increased as topping from early bud to full bud period and declined from full bud to early flower period in lower leaves. The remaining leaf number was negatively correlated with nicotine conversion rate. The harvest way of stalk-cutting was in favor of decreasing nicotine conversion rate and the picking up opposite. Medium level of RH was in favor of decreasing nicotine conversion rate in middle and low leaves while higher RH, the upper leaves.
下載: