|Table of Contents|

Effects of Different Cluster Thinning Times on Grape Quality of ‘Meili’

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年09
Page:
32-3
Research Field:
Publishing date:

Info

Title:
Effects of Different Cluster Thinning Times on Grape Quality of ‘Meili’
Author(s):
HE Zhouyang; LIN Chanchan; YANG Chenlu; WANG Hua; LI Hua
(College of Enology,Northwest A&F University,Yangling,Shaanxi 712100)
Keywords:
cluster thinning time; ‘Meili’ grape; fruit quality
PACS:
-
DOI:
10.11937/bfyy.20194054
Abstract:
Grape variety of ‘Meili’ in Yangling was used as experimental materials,and the plants were thinned at a certain time interval (2 weeks) after flowering.The index of transverse and vertical diameter,100-grain weight,soluble solids,reducing sugar,titratable acid and phenolic substances of mature berries of different treatments were determined respectively,and the principal component analysis (PCA) was used to compare the quality of mature berries thinned in different time of ‘Meili’to obtain the best time for cluster thinning in Yangling.The results showed that cluster thinning treatment could improve the performance of berries in soluble solids,sugar-acid ratio and phenolic content.The overall score of PCA was T3>T4>T2>T5>T1>T6>CK,and it was found that the berry quality of the treated group was better than that of the control,and the 6th week (T3) to 8 weeks (T4) after the flowering was better than other time periods to thinning plants.The mature berries with cluster thinning at the 6th week after flowering had the highest comprehensive score,and their soluble solids,M value,total phenols,total flavanols and total flavonoids in the peel and total flavanols and total flavonoids in the seeds were the highest.Its soluble solids,M value were 11.75%,28.44% higher than CK.The content of total phenols and total flavanols in the peel was 9.93% and 24.22% higher than that of CK,and the content of total phenols,total flavanol and total flavonoids in the seed was higher than CK 17.04%,21.91% and 6.99%,respectively.In summary,the 6th week after flowering was the best time for cluster thinning,and the mature berry had the highest comprehensive score,which could significantly improve the quality of the ‘Meili’grape.Secondly,cluster thinning at the 8th week after flowering was a good time,which could play a positive role in improving the quality of berries.

References:

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Last Update: 2020-07-08