Dry mass loss of different moisture content canola at different temperatures

[摘要] Dry mass loss (DML) of Sound canola and Mouldy canola(sound + mouldy canola) was measured at 25, 30, and 35oCover 14 weeks by weighing 10 kg samples every 2 week.The moisture content of the canola was 10, 12.5, and 15.0%(wet basis). The relationship was quantified among theDML measured gravimetrically, germination decrease rate(GDR), and decrease in the percentage of test weight(PTW). The measured DML was also compared with theDML estimated from respired CO2. The measured DMLincreased as germination and test weight decreased, and theSpearmen Rank Order correlation between DML andgermination or between DML and PTW was greater than0.58 in 18 of 24 cases. The GDR of mouldy canola wassignificantly higher than that of Sound canola except at 15%moisture content and 35oC. A decrease of germinationand/or PTW could be used to estimate roughly the DMLtrend but did not predict the DML value with high accuracy.There was no significant difference between the measuredand estimated-DML. Measuring the mass loss or CO2production roughly estimated DML but using DML toevaluate grain quality was unreliable.

[学科分类] 农业科学（综合）

[关键词] Dry mass loss;sound canola;mouldy canola;germination