白肋煙干物質(zhì)積累動態(tài)及地下部與地上部相關性研究
Dynamics Study of Burley Tobacco Biomass Accumulation and Its Relativity to the Subterranean and on the Ground
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摘要: 研究結(jié)果表明,，白肋煙大田期干物質(zhì)積累呈"慢-快-慢"的S型,，積累強度的高峰期在50～60 d，葉和全株的積累強度旺長前期（20～50 d）大于后期（60～80 d）,，而根莖的則反之,。各器官干物質(zhì)積累量的高峰期滯后于積累強度高峰期為64～73 d，積累曲線方程表明，根,、莖積累量高值期比全株高值期提前2 d,，葉片高值期比全株提前9 d，比根,、莖提前7 d,。干物質(zhì)在器官中的分配率始終是遵循葉>莖>根的規(guī)律，根/冠,、葉/莖比值隨生育進程呈下降趨勢,，根/冠比值動態(tài)比葉/莖比值波動小。根的干物質(zhì)積累與地上部的莖葉積累和株高,、莖圍,、葉片數(shù)等生物學性狀互為顯著正相關，與葉片化學成份的總糖,、還原糖,、煙堿含量呈正相關，而與總氮,、蛋白質(zhì)含量呈負相關,。Abstract: Results showed that the biomass accumulation of Barley tobacco in the field appeared to be "S" style of s "low-fast-slow". The dynamics of accumulation was accord with the logistic growing curve. The highest accumulation of the accumulation amount and intensity was at the 50 to 60 days. The accumulation intensity in the leaves or whole plant at the earlier stage (20 to 50 days) was larger than that in the later stage (60 to 80 days), but it was opposite in the roots and stems. The ratio of the biomass distribution in the organs follow the rule of leaves＞stem＞root. The value of root/crown and leaves/stem were reduced with the progress of the growing procedure. The value of root/crown was more stable than that of leaves/stem. The accumulation in the roots and accumulations in stem and leaves were related to some biological characteristics such as the plant height, stem perimeter and leaves numbers et.And it was also related to the amount of total sugar, reduced sugar and total nicotine in the leaves, but there is a negative relationship with the total N and protein amount.
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