Differences on Pigment Contents of Flue-cured Tobacco Leaves in Soils with Different Textures

Four kinds of soils with different textures in middle region of Henan Province tobacco area were selected to investigate the differences of Chromoplas pigment contents at different growth stages and flue-cured tobacco leaves.The results showed that for sandy soil the contents of β-carotene and total carotenoids were higher in flue-cured tobacco leaves but other pigments degraded more;for sandy loam soil most pigments decreased slightly before the mature stage but then decreased evidently,chlorophyll,β-carotene and total carotenoids remained less in the flue-cured tobacco leaves,and the chromoplast pigment degraded completely;for loam soil,all pigments decreased clearly with the growth stage and remained less in flue-cured tobacco leaves;for clay soil,all pigments decreased slightly before the mature stage but degraded less and were higher at the mature stage,in flue-cured tobacco leaves chlorophyll and total carotenoids were on the high side.Flue-cured tobacco cultivation in sandy loam and loam soils were in favor of the accumulation and timely transformation of fragrant precursors.