不同氮肥用量对石榴果实产量和品质的影响

以‘秋艳’石榴为试验材料,研究了不同氮肥用量对其果实产量和品质的影响。结果表明,施用氮肥可显著提高石榴果实产量,适量施用氮肥可增加石榴果实可溶性固形物、Vc、糖含量,降低石榴果实酸含量,提高石榴果实糖酸比,改善石榴果实的风味;施用氮肥对石榴百粒重、籽粒硬度无显著影响;石榴籽氮元素含量高于石榴皮,石榴汁中氮含量很低,中高氮处理的石榴汁中氮元素含量显著降低,石榴皮和石榴籽中氮元素含量变化不显著;本试验5年生石榴树纯氮施肥用量宜以0.4 kg·株~(-1)为宜。

Effects of application of N fertilizers on yield and quality of pomegranate

In this paper,different levels of nitrogen fertilizer were applied in Qiuyan varieties(Punica granatum L.)to study their effect on fruit yield and quality.The results indicated that the contents of soluble solids,vitamin C and sugar were increased when proper quantity of nitrogen fertilizer was applied.The yield was increased significantly when nitrogen fertilizer was applied,but the content of acid were decreased.The ratio of sugar to acid were increased.Nitrogen fertilizer application had no effect on the seed weight and seed hardness.The nitrogen content of pomegranate seeds was higher than that of pomegranate peel,and the nitrogen content in pomegranate juice was very low.The content of nitrogen in pomegranate juice was significantly decreased in middle and high nitrogen treatment,and the change of nitrogen content of pomegranate peel and pomegranate seed was not significant.In this experiment,the optimal nitrogen fertilizer application amount for the 5-year-old pomegranate trees was 0.4 kg·plant-1.