在盐碱环境下,对白肉火龙果果实生长过程中氮、磷、钾、钙、镁和钠等营养元素的动态变化进行观察、测定和分析.结果表明:氮、磷、钾和镁含量的变化趋势相似,总体呈“倒N”型变化,钙含量的变化在整个生长过程中始终保持下降趋势,钠含量波动较大.在不同生长阶段,氮、磷、钾、钙、镁和钠等营养元素含量变异系数较大,从27.60 ％～43.52％.果实中氮、磷、钾、钙、镁和钠含量累积的峰值均出现在花后30d,分别为682.22、83.11、993.92、55.73、107.04和11.94 mg,在花后6～15 d及26～30d累积速率较快.该研究结果为指导盐碱环境下火龙果的高效栽培利用提供参考.%In this study, the variation of N, P, K, Ca, Mg and Na contents in Pitaya fniit were observed and analyzed during the development stages under saline conditions. The results revealed the contents of N, P, K, and Mg all displayed a ' inverted N' variation, while the Ca content showed a unilateral down trend and the Na content showed a comparatively large fluctuation. In seven different development stages of Pitaya fruit, the variation coefficient of N, P, K, Ca, Mg and Na were from 27.60% to 43.52%. The maximum contents of N, P, K, Ca, Mg and Na per single Pitaya fruit all appeared at 30 d after flowering, were 682.22、 83.11、 993.92、 55.73、 107.04 and 11.94 mg respectively. The accumulation rate of N, P, K, Ca, Mg and Na increased faster during 6~15 d after flowering and 26~30 d after flowering. Our data provided clues for guiding effective cultivation and utilization of Pitaya in saline soils.
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