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Effects of preharvest calcium treatments on nutrients contents in fruits and leaves of kiwifruit#br#

  

  1. 1The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province,School of Agriculture and Food Science, Zhejiang A & F University,Linan 311300,China;2 Public Comprehensive Service Center,Baimu Town,Wuyi 321205,China; 3 Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Online:2014-07-25 Published:2014-08-06

Abstract: In order to explore the influences of preharvest calcium treatments on nutrients contents in fruits and leaves of kiwifruit and the correlation between calcium concentration and each nutrition element content, six different calcium concentrations were designed in this study with spraying or immersing fruits. The results showed that the contents of Ca, Mg and Cu in the leaves of kiwifruit increased significantly after calcium treatments and had a positive correlation with the calcium concentration. The contents of K in leaves decreased as the calcium concentration increased. The Zn and P contents also increased in the leaves after calcium treatment, while it has no significant correlation with calcium concentration as Fe and Mn contents. The contents of Ca, Mg and Zn in fruit increased after calcium treatment, which was positively correlated with calcium concentration. The content of Cu, Fe in fruits increased, but it has no correlation with calcium concentration. It was suggested that spraying calcium can increase Mg content in fruits more effectively. The method of immersing fruits in calcium solution is better for increasing Fe and Mn contents in fruits.

Key words: kiwifruit, calcium, nutrition elements