苗期剪葉處理對烤煙生長發(fā)育的影響

Effects of clipping treatment on growth and development of flue- cured tobacco

摘要: 以NC82 為材料進行了苗期剪葉處理對煙草生長影響的研究,。剪葉處理對煙草生長的影響與溫度條件有很大關(guān)系,，在低溫條件下影響明顯，而高溫條件下影響較小,。低溫造成早花的情況下剪葉可以推遲現(xiàn)蕾期20 天以上,，且剪葉次數(shù)越多推遲時間越長。剪葉處理降低了大田早期（ 50 d）的株高,，但不會影響最終株高,。剪葉處理比不剪葉處理多1 片葉,。剪葉對花芽分化的顯微結(jié)構(gòu)無明顯影響。

Abstract: The experiment conducted with flue - cured tobacco variety NC82 revealed that the effects of clipping in seedling stage on growth and development of tobacco could undergo different changes with temperature, more significant under low temperature than high temperature. For tobacco plants with premature flower resulted from lower temperature, the flower budding stage could be postponed over 20 days by clipping treatment, and the effect was furthered with added clipping. Clipping could reduce the plant height in 50 days after transplanting, but no effect on final height. The total leaf number of clipped plant was one more than nonclipped plant, but clipping didn’t affect the microstructure of flower bud differentiation significantly.