地表覆膜对椪柑果实糖酸品质及矿质元素的影响

Effects of film mulching on total soluble solution,titratable acid and contents of mineral elements in Ponkan(Citrus reticulata)fruit

以12年生枳砧椪柑为材料,研究地表覆膜对椪柑果实汁胞中糖酸和6种矿质元素含量的影响。结果表明:覆膜处理增加了果实的可溶性固形物(TSS),降低了可滴定酸(TA)含量,明显改善了其品质;叶片中K、Mn含量明显低于对照,P、Ca、Mg的含量则显著高于对照,而Fe的含量没有明显差异;汁胞中元素含量的变化表现出与叶片不一致,覆膜后20 d,汁胞中P、Mg的含量没有明显差异,而K、Ca含量显著低于对照,Fe和Mn的含量明显高于对照;覆膜后40 d,汁胞中P、Mg、Ca、Fe、Mn的含量都明显高于对照,而K含量极显著低于对照。覆膜可能通过影响柑橘汁胞中矿质元素的积累而影响糖酸积累。

Effects of film mulching（FM） on the total soluble solution（TSS）,titratable acid（TA）,the contents of 6 mineral elements（K,P,Mg,Ca,Fe and Mn） in Ponkan（Citrus reticulata） fruit was investigated using 12-year-old Ponkan as material.Results showed that FM improved fruit quality by increasing TSS and decreasing TA.Under the FM treatment of leaf,contents of K and Mn decreased significantly while contents of P,Ca and Mg obviously increased.In the juice sacs,FM decreased the contents of K and Ca significantly but increased significantly the contents of Fe and Mn at 20 days after FM.At 40 days after FM,contents of P,Mg,Ca,Fe and Mn were obviously higher than those in the control except for K lower obviously than that in the control.Results indicated that the influence of mineral accumulation in juice sacs by FM might contribute to the improvement of fruit quality via the increase of TSS and the decrease of TA.