- Author: SHA Shoufeng, LI Juncai, WANG Jiazhen, CAI Zhongmin, LI Hongjun, JIANG Xiaoyan
- Keywords: 'Zaojinsu' pear; Fruit; Calcium fertilizer; Zinc fertilizer; Sugar content; Organic acid content; Ratio of sugar to acid;
- DOI: 10.13925/j.cnki.gsxb.2018.S.17
- Received date:
- Accepted date:
- Online date:
PDF （） Abstract（）
Abstract：【Objective】To investigate the influence of mineral nutrition on the contents of sugar, organic acid and their ratio in'Zaojinsu'pear fruits.【Methods】The high-performance liquid chromatography was used to measure the sugar and the organic acid contents in ripe fruits of'Zaojinsu'pears (Pyrus bretschneideri Rehd.) that had received foliar application of Ca or Zn fertilizers during the growing season.【Results】It was observed that foliar application of chelate calcium very significantly increased the fructose and total sugar contents in the fruit, and it significantly increased the glucose, sucrose and oxalic acid contents as well as the ratio of sugar to acid in the fruit, while it very significantly decreased the malic acid, citric acid and total organic acid contents in the fruit.Calcium chloride was found to very significantly increase the total sugar content and the ratio of sugar to acid in the fruit, and it significantly increased the fructose and glucose contents in the fruit, while it very significantly decreased the malic acid, shikimic acid, citric acid and total organic acid contents in the fruit, and it significantly decreased oxalic acid content in the fruit.Zinc sulfate was found to very significantly increase the fructose content and very significantly decreased glucose content in the fruit, while it significantly increased the quinic acid content in the fruit.The results of correlation analysis further showed that calcium treatment increased fructose and glucose contents, reduced citric acid content in fruits, thus increasing total sugar content and reducing total acid content, improving the quality of'Zaojinsu'pear fruits.【Conclusion】For sake of foliar application of calcium fertilizer on'Zaojinsu'during the growing season, the total sugar content very significantly increased and the total organic acid content very significantly decreased in the fruit, and it significantly increased the ratio of sugar to acid in the fruit, thus improving the quality of'Zaojinsu'pear fruits.