有机肥替代部分化肥改善‘三红蜜柚’树体营养及果实品质

Partial Substitution of Chemical Fertilizer by Organic Fertilizer Improving Nutrition and Fruit Quality of’Sanhong-miyou’

本研究以单施化肥为对照,研究有机肥替代部分化肥对‘三红蜜柚’树体营养及果实品质的影响。结果表明:与对照相比,有机肥替代20%化肥处理可显著提高‘三红蜜柚’叶片镁、锌含量,降低叶片氮含量至适宜水平;提高‘三红蜜柚’发育过程中果实钾、钙、锌、硼含量,降低果实磷含量;并显著提高果实可溶性固形物含量、总糖含量及糖酸比,降低果实可滴定酸含量,而维生素C含量、可食率和单果质量等与对照相比未呈现显著差异。因此,有机肥替代20%化肥可提高‘三红蜜柚’叶片部分矿质营养元素含量,改善树体营养水平,提高‘三红蜜柚’果实钾、钙、锌、硼等矿质元素含量及果实品质。

A field experiment was carried out to study the effects of organic fertilizers partly replacing of chemical fertilizers on the nutrition and fruit quality of’Sanhong-miyou’.Two fertilization treatments were selected:20% of chemical fertilizer replaced by organic fertilizer(T)and only chemical fertilizer(CK).The results showed that T could significantly increase the magnesium and zinc contents in the leaves of’Sanhong-miyou’and reduce the nitrogen content of the leaves to the appropriate level,increase the content of potassium,calcium,zinc and boron in fruits of’Sanhong-miyou’,reduce the phosphorus content during fruit development.In addition,it also significantly increased the soluble solid,total sugar and sugar acid ratio,reduced titratable acid of the fruits,and the Vc content,edible rate and single fruit quality of it did not show significant difference compared with CK.