Loss of Kernel Quality Associated with Harvest Delays in Tasmania, Australia

摘要：

　　Knowledge of factors that adversely affect the quality of walnuts grown in Tasmania, Australia, is limited.Experiments over two years investigated the temporal development of fruit maturity and the effect of harvest delays on kernel quality.The progression of kernel maturity, or packing tissue brown (PTB), was similar in Lara and Vina, with 95% PTB predicted between 77 and 87 days after January 1.The onset of harvest, defined as 80% hullable fruits, was similar for the two cultivars, occurring within 5-days of each other.Delaying harvest beyond 95% PTB reduced kernel quality in both years.In 2009-10, delaying harvest significantly reduced the percentage of extra-light kernels for Vina, Howard and Chandler i.e., for Chandler, from 77% extra-light with no harvest delay compared to 63% a 7-day harvest delay.Delaying harvest by 7 days significantly increased the percent of kernels with yellow pellicle i.e., from less than 6% yellow pellicle with no delay to 24, 28 and 51% of Howard, Vina and Chandler nuts, respectively, with a 7-day harvest delay.Similarly, in 2011-12 Lara and Chandler nuts harvested 8 days or more after tree shaking had fewer extra-light kernels, and more yellow pellicle and mould, compared to nuts harvested earlier.Additional research will identify seasonal variations and improve the initial description of fruit maturity and factors affecting kernel quality.

关键词： walnut walnut maturity packing tissue brown hull split kernel colour yellow pellicle mould

作者: M.D.Lang J.A.Sulcs K.J.Evans

作者单位: Walnuts Australia,PO Box 417,Devonport,TAS,7310,Australia;Perennial Horticulture Centre,Tasmanian In Walnuts Australia,PO Box 417,Devonport,TAS,7310,Australia Perennial Horticulture Centre,Tasmanian Institute of Agriculture,University of Tasmania,Private Bag

会议类型: 国际会议

会议名称: The 7th International Walnut Symposium(第七届世界核桃大会)

会议地点: 山西汾阳

会议语种:英文

页码: 309-314

在线出版日期: 2013-07-20（万方平台首次上网日期，不代表论文的发表时间）