4个油茶无性系叶片内各营养元素含量变化研究

Changes of nutrient element contents in four Camellia oleifra strains leaves

为给油茶理论研究和生产实践提供参考依据,以油茶的4个无性系——岑软2号、岑软3号、湘林8号、阳春5号为试验材料,连续1年定期采集各树种7年生叶片,测定其叶片内氮、磷、有机质、可溶性糖及淀粉等营养元素的含量,并研究了各营养元素含量的变化规律。结果表明:自当年6月至次年5月,叶片中的氮和可溶性糖含量均呈"下降—升高—下降—升高"的变化趋势;磷含量呈"升高—下降—升高"的变化趋势;淀粉含量在6月份最高,随之下降,之后又开始波动上升;有机质含量在5月份最高。

In order to provide a reference for theoretical researches and productive practice on Camellia oleifra, taking Cenxi soft No.2, Cenxi soft No.3, Xianglin No.8 and Spring No.5 as test materials, 7-year-old leaves of each strains were collected regularly for one consecutive year, the contents of nitrogen, phosphorus, organic matter, soluble sugar and starch in leaves were determined, and change regulations of each nutrient element content were researched. The results showed that from June of that year to next May, nitrogen and soluble sugar contents in leaves showed the trend of ＂declining- rising-declining-rising＂ , phosphorus content showed the trend of ＂rising-declining- rising＂ . Starch content was the highest in June, and then declining and later began to fluctuate, and organic matter content was the highest in May.