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为探讨人参氮素营养规律,在基肥不同施氮量(0,10,20,30,40g/m2)条件下.采用(14)C示踪方法和化学分析方法,测定了人参对(14)CO2同化能力,NR活性,N、P、K营养的吸收,糖、蛋白N、非蛋白N以及人参皂甙的变化。结果表明,四龄参在基施氮肥10g/m2,(14)CO2同化能力,NR活力最高;基施氮肥30g/m2时吸K量下降;基施氮肥40g时吸N量、NPN(蛋白N)与PN(非蛋白N)、NPN/PN值下降,C/N值下降43%,总可溶糖、蔗糖下降,淀粉增加。五龄参时,基施氮肥40g/m2处理组还原糖增加60%左右,皂甙含量下降。
In order to explore the nitrogen nutrition law of ginseng, basal fertilizer under different N rates (0, 10, 20, 30, 40g / m2). (14) C tracing method and chemical analysis were used to determine the changes of (14) CO2 assimilation capacity, NR activity, N, P and K nutrient absorption, sugar, protein N, non-protein N and ginsenoside. The results showed that the relative content of CO2 assimilation ability and (14) CO2 assimilation ability were the highest in the fourth stage of nitrogen application, while the K uptake was decreased when the nitrogen application rate was 30g / m2. The N uptake amount, NPN (protein N ) And PN (non-protein N), NPN / PN value decreased, C / N value decreased by 43%, total soluble sugar, sucrose decreased, starch increased. Five-year-old participants, the base of nitrogen fertilizer 40g / m2 treatment group reducing sugar increased by about 60%, saponin content decreased.