摘要
[Objectives] This study was conducted to investigate the effects of different types of potassium fertilizers on the flavor and quality of pear fruit.[Methods] With ‘Xinliqihao’ as a research object,such three treatments as potassium sulfate (T1),potassium nitrate (T2) and potassium chloride (T3) were set up,with no application of potassium fertilizer as control (CK).All the fertilizers were applied into soil in the growing season.[Results] The total sugar content of ‘Xinliqihao’ was significantly higher in the potassium fertilizer treatments than that of the control.The total sugar content of T 2 (the potassium sulfate treatment) was the highest,which was 34.55% higher than that of the control,sequentially followed by T3 (the potassium nitrate treatment) and T1 (the potassium chloride treatment).The contents of fructose,glucose and sucrose in the potassium sulfate treatment were all the highest,which were 15.96%,27.32% and 52.81% higher than those of the potassium chloride treatment,respectively,and 11.36%,27.75% and 20.45% higher than the potassium nitrate treatment,respectively.The total acid content of ‘Xinliqihao’ fruit treated with different types of potassium fertilizers was higher than that of the control.The total acid content of the potassium nitrate treatment was the highest,which was 103.68% higher than that of the control,sequentially followed by the potassium sulfate treatment and the potassium chloride treatment.Both the control and potassium treatments of ‘Xinliqihao’ had the highest malic acid content,and except the potassium chloride treatment with the lowest fumaric acid content,other treatments all had the lowest tartaric acid content.Different types of potassium fertilizer treatments had different effects on the organic acid content of ‘Xinliqihao’ fruit.The types and contents of volatile aroma substances in the fruit of ‘Xinliqihao’ treated with potassium fertilizers were significantly higher than the control.The aroma substances in ‘Xinliqihao’ differed among different potassium fertilizer treatments.Specifically,78 kinds of aroma substances were detected in the potassium chloride treatment,and the total content of aroma components was the highest at 746.609 ng/g in the fruit of the potassium sulfate treatment.[Conclusions] The potassium fertilizer treatments improved the flavor and quality of ‘Xinliqihao’ pear fruit,and the potassium sulfate treatment exhibited the best effects.
[Objectives] This study was conducted to investigate the effects of different types of potassium fertilizers on the flavor and quality of pear fruit. [Methods] With ‘Xinliqihao’ as a research object, such three treatments as potassium sulfate（T1）, potassium nitrate（T2） and potassium chloride（T3） were set up, with no application of potassium fertilizer as control（CK）. All the fertilizers were applied into soil in the growing season. [Results] The total sugar content of ‘Xinliqihao’ was significantly higher in the potassium fertilizer treatments than that of the control. The total sugar content of T2（the potassium sulfate treatment） was the highest, which was 34.55% higher than that of the control, sequentially followed by T3（the potassium nitrate treatment） and T1（the potassium chloride treatment）. The contents of fructose, glucose and sucrose in the potassium sulfate treatment were all the highest, which were 15.96%, 27.32% and 52.81% higher than those of the potassium chloride treatment, respectively, and 11.36%, 27.75% and 20.45% higher than the potassium nitrate treatment, respectively. The total acid content of ‘Xinliqihao’ fruit treated with different types of potassium fertilizers was higher than that of the control. The total acid content of the potassium nitrate treatment was the highest, which was 103.68% higher than that of the control, sequentially followed by the potassium sulfate treatment and the potassium chloride treatment. Both the control and potassium treatments of ‘Xinliqihao’ had the highest malic acid content, and except the potassium chloride treatment with the lowest fumaric acid content, other treatments all had the lowest tartaric acid content. Different types of potassium fertilizer treatments had different effects on the organic acid content of ‘Xinliqihao’ fruit. The types and contents of volatile aroma substances in the fruit of ‘Xinliqihao’ treated with potassium fertilizers were significantly higher than the control. The aroma substances in ‘Xinliqihao’ differed among different potassium fertilizer treatments. Specifically, 78 kinds of aroma substances were detected in the potassium chloride treatment, and the total content of aroma components was the highest at 746.609 ng/g in the fruit of the potassium sulfate treatment. [Conclusions] The potassium fertilizer treatments improved the flavor and quality of ‘Xinliqihao’ pear fruit, and the potassium sulfate treatment exhibited the best effects.
基金
Supported by Agricultural Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences(CXGC2018F03)
National Pear-industry Technology Research System(CARS-28-36)
Major Science and Technology Innovation Project of Shandong Province(2018CXGC0208)
National Natural Science Foundation of China(31601708)
Agricultural Improved Variety Project of Shandong Province(2016LZGC034)
