4个油茶无性系叶片内各营养元素含量变化研究

摘要

In order to provideareferencefor theoreticalresearchesand productive practice on Camellia oleifra, taking Cenxi soft No.2, Cenxi soft No.3,Xianglin No.8and Spring No.5as testmaterials, 7-year-oldleaves of each strainswere collectedregularlyfor one consecutive year, the contents of nitrogen, phosphorus, organicmatter, soluble sugarand starch inleaveswere determined,and changeregulations of each nutrient element contentwereresearched. Theresults showed thatfromJune of that year to nextMay, nitrogenand soluble sugar contentsinleaves showed the trend of"declining-rising-declining-rising", phosphorus content showed the trend of"rising-declining-rising". Starch contentwas the highestinJune,and then decliningandlater began tolfuctuate,and organicmatter contentwas the highestinMay.%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.