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用~(14)C 示踪等方法,研究了茶树在红壤中碳代谢特性,结果表明,红壤茶株中碳素同化产物主要分布于幼嫩新梢,其中转化成贮藏糖的含量明显低于对照。同化的碳素大量被调用,以形成多酚类、咖啡碱、氨基酸和有机酸等次级产物,同时,参入结构糖粗纤维的比例也较大。与放射性强度所反映的动态情况相反,红壤茶苗中各级代谢产物的静态含量,包括多酚类、氨基酸、咖啡碱等,都比对照低。说明红壤茶苗总的代谢能力较弱。红壤茶株叶片中1,5-二磷酸核酮糖羧化酶活性和可溶性蛋白质含量偏低,碳素同化能力显著低于对照土壤。将红壤中的 N、P、K 含量调整至与对照土壤相同水平时,同化能力虽有所提高,但仍低于对照水平。红壤茶苗的生物学产量亦明显低于对照,与同化能力的差异一致。报告中,对红壤茶叶品质低次的原因进行了讨论。
The results showed that the carbon assimilation products of tea plants in red soil mainly distributed in young shoots, and the content of carbohydrate converted to stored sugar was obviously lower than Control. A large number of assimilated carbons are called to form secondary products such as polyphenols, caffeine, amino acids, and organic acids, and at the same time, the proportion of crude sugar incorporated into the structure is also large. Contrary to the dynamic conditions reflected by the radioactive intensity, the static content of metabolites at all levels in red tea seedlings, including polyphenols, amino acids, caffeine, etc., are lower than the control. Red tea seedlings that the overall metabolic capacity is weak. The content of ribulose-1, 5-bisphosphate carboxylase activity and soluble protein in the leaves of red soil tea plants was low, and their carbon assimilation ability was significantly lower than that of the control soil. When the content of N, P and K in red soil was adjusted to the same level as that of the control soil, the assimilative ability was still higher than the control level. The biological yield of tea seedlings in red soil was also significantly lower than that of the control, which was consistent with the difference of assimilation ability. In the report, the reasons for the low quality of red soil tea were discussed.