套袋对‘红富士’苹果品质和Ca、Mg、K营养的影响

分别于盛花后25、35、45、55d对‘红富士’苹果进行套袋(果袋为内层红色袋、外层外灰内黑双层纸袋)处理,结果表明,早期套袋有提高果实单果重的趋势,降低果实可溶性固形物含量,对硬度和可滴定酸影响不大。果实成熟时,不同时期套袋对果肉Ca、K含量没有显著差异,但早期套袋增加果肉Mg含量,降低Ca/Mg比值。同时,在盛花后35d进行3种果袋(内层白、外层外灰内灰双层纸袋;内层黑、外层外灰内黑双层纸袋;内层红、外袋外灰内黑双层纸袋)处理表明,与对照(不套袋)相比,套袋使果实单果重增加,可溶性固形物含量降低,Ca含量、Ca/K影响不显著;而内袋红、外袋内黑外灰双层纸袋处理的果实Mg含量显著高于对照,内袋黑、外袋内黑外灰双层纸袋的果实K含量显著低于对照,并且上述两种果袋处理的果实Ca/Mg比值显著低于对照,其余果袋对品质和Ca,Mg,K均无明显的影响。

The Effect of Bagging on Quality and Ca,Mg,K Nutrition of 'Red Fuji'Apple

Red Fuji''apples was bagged with red-inner and black-inner gray-outer outer double-layer fruit bag at 25,35,45,55 days after full bloom.The results showed that bagging at earlier development stage had a trend to increase weight per fruit,decrease the soluble solid content,but fewer effects on firmness and titratable acid content.Compared with control(Non bagging),the bagging at different time had no marked influence on flesh Ca,K content,expect that bagging at earlier development stage increased Mg content,reduced the ratio of Ca/Mg of flesh at maturity stage.And also,the fruits were bagged with three different types of bags(White inner and gray-inner gray-outer outer double-layer,black inner and black-inner gray-outer outer double-layer and red-inner and black-inner gray-outer outer double-layer)at 35th day after full bloom,the weight per fruit increased and soluble solid content decreased,respectively,but the Ca content and Ca/K had not significant difference with control,but the Mg content was increased by red-inner and black-inner gray-outer outer double-layer bag,and also the K content by black inner and black-inner gray-outer outer double-layer bag,but Ca/Mg decreased by these bags.Expect of this,there is no significant difference about Ca,Mg,K content among other bagging treatments.