关键词: 稳产性, 稳产性

Abstract:

To study the effects of planting density and transplanting time on the growth and quality of flue-cured tobacco, a field experiment was conducted by a split plot design, including two planting density as main treatment and three transplanting as vice treatment, to investigate the effects of planting density and transplanting time on the growth period and type of flue-cured tobacco plants, and analysis the relationship planting density and transplanting time and yield and its components, leaf chemical composition, sensory quality. The results showed that: (1) With the postponement of the transplanting period, the development of the tobacco was stunting, and the growth peak period and baked period tended to shorten. Planting density has no significant effect on the processes of development on tobacco plant. (2) The rate of early flowers and branch tobaccos in tobaccos were increased when transplanting time was early or late, and were no significantly affected by planting density of flue-cured tobacco. (3) Ahead of transplanting, the yield of high-density planting was significantly higher than that of the low-density planting; Normal or postponed transplanting, planting density had no significant effect on the yield of flue-cured tobacco; When the transplanting was in advance or postpone, planting density reduced can lead to the decline about the concentration of aroma in the central leaf. The transplanting time advanced can reduce the sensory quality in upper leaves, and the transplanting time postponed was to improve the sensory quality of the upper leaves. Therefore, the reasonable configuration of planting densities and the transplanting time play an important role to regulate the growth and development of flue-cured tobacco, as well as to build on the high yield and quality.