Featured Research

from universities, journals, and other organizations

Zinc sulfate, sugar alcohol zinc sprays improve apple quality

Date:
November 19, 2013
Source:
American Society for Horticultural Science
Summary:
Researchers calculated the response of apple fruit quality to sprays of zinc sulfate and sugar alcohol zinc to determine whether continuing to supply zinc to trees could increase the fruit quality of "Fuji" and "Gala" apples. Results showed that, although the apple trees showed no zinc deficiency symptoms and the leaf zinc nutrition was at a low level, continuing zinc sprays throughout the growing cycle was necessary to increase fruit quality.

Zinc is vital for the healthy growth and reproduction of all organisms. In plants, zinc plays a key role in essential functions such as carbohydrate metabolism, photosynthesis, and sugar and starch synthesis. Apple, one of the world's most popular fruits, tends to be highly susceptible to zinc deficiency. A new study in HortTechnology recommends new protocols for using zinc sprays at critical stages on apple trees in order to enhance fruit quality.

Related Articles


Researchers sprayed 'Gala' and 'Fuji' apple trees in China with zinc sulfate (ZnSO4) and sugar alcohol zinc separately during four different developmental stages: 2 weeks before budbreak, 3 weeks after bloom, the termination of spring shoot growth, and 4 weeks before harvest. They then harvested the apples at maturity and analyzed the fruit for quality and zinc concentration.

According to the report, zinc sprays during the four different developmental stages increased zinc concentration of peeled and washed fruit at harvest without phytotoxicity. The treatments 3 weeks after bloom and 4 weeks before harvest increased average fruit weight of both 'Gala' and 'Fuji' apples. Other combinations of treatments were determined to increase fruit firmness, soluble sugar, and vitamin C levels in the cultivars. The scientists said that the effects of sugar alcohol zinc applications were equal to and "more pronounced" than those of ZnSO4.

"Although the apple trees showed no zinc deficiency symptoms and the leaf zinc nutrition was at a low level, continuing zinc sprays on these trees was required to increase fruit quality," the researchers said. "We found that a single spray of sugar alcohol zinc was equal to or more effective than zinc sulfate at being absorbed by apple fruit tissue and improving fruit quality for trees grown under field conditions."

These experimental results offer new strategies for apple growers. Based on a cost analysis, the authors recommend that growers spray ZnSO4 or sugar alcohol zinc, with 0.1% zinc and 0.04% nitrogen in the spraying solution, on the abaxial/adaxial surfaces of apple leaves to runoff at 4 weeks before harvest.


Story Source:

The above story is based on materials provided by American Society for Horticultural Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yong Zhang, Chunxia Fu, Yujing Yan, Yan’an Wang, Ming Li, Meixiang Chen, Jianping Qian, Xinting Yang, and Shuhan Cheng. Zinc Sulfate and Sugar Alcohol Zinc Sprays at Critical Stages to Improve Apple Fruit Quality. HortTechnology, November 2013

Cite This Page:

American Society for Horticultural Science. "Zinc sulfate, sugar alcohol zinc sprays improve apple quality." ScienceDaily. ScienceDaily, 19 November 2013. <www.sciencedaily.com/releases/2013/11/131119112822.htm>.
American Society for Horticultural Science. (2013, November 19). Zinc sulfate, sugar alcohol zinc sprays improve apple quality. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2013/11/131119112822.htm
American Society for Horticultural Science. "Zinc sulfate, sugar alcohol zinc sprays improve apple quality." ScienceDaily. www.sciencedaily.com/releases/2013/11/131119112822.htm (accessed October 25, 2014).

Share This



More Plants & Animals News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins