不同施肥量对‘巨玫瑰’葡萄生长和果实品质的影响

为探求设施栽培条件下追肥水平对葡萄生长和果实品质的影响，连续2年在‘巨玫瑰’葡萄果实膨大期开展不同追肥量的施肥试验，对果实品质指标、肥料吸收指标、净光合速率等指标进行测定。结果表明，超过300 kg/hm2的施肥量对‘巨玫瑰’葡萄果实的平均果粒重、可溶性固形物、可滴定酸含量、果实硬度等品质指标没有显著影响；不同施肥量对叶柄的氮、磷、钾含量没有显著影响；而且施肥后虽然能比对照增加叶片净光合速率(Pn)，但施肥量超过300 kg/hm2后，增加施肥量对叶片净光合速率没有显著影响。综合以上结果认为，设施栽培条件下‘巨玫瑰’葡萄的适宜施肥水平应为300 kg/hm2左右。

Study on the Effects of Growth and Fruit Quality in Response to Different Fertilizing Levels in ‘Jumeigui’ Grapes

The experiments were continuously conducted under protected condition in 2009 and 2010,in order to elucidate the effects of different compound fertilizing levels on fruit quality,leaf petiole nutrient absorption,and leaf net photosynthetic rate of＇Jumeigui＇grape at the stage of fruit cell rapid elongation.NPK compound fertilizer of six levels was top-dressed to＇Jumeigui＇grape trees.The related characteristics of fruit quality,nitrogen（N）,phosphate（P）,and potassium（K） content of leaf petiole,leaf net photosynthetic rate（Pn）,were investigated and compared.The results showed that,when the fertilizer level exceeded 300 kg/hm2,there were no significant differences of average berry weight,total soluble solid content（TSS）,titrate-acid（TA）,and fruit firmness among the treatments.The leaf petiole N,P,K had not changed significantly among different fertilizing level.Moreover,although fertilizing increased the leaf Pn compared to the control,it was not significantly affected by different fertilizing levels.Therefore,integrating these results,it was concluded that,under the protected condition of＇Jumeigui＇grape,the feasible fertilizing amount may be about 300 kg/hm2.