The investigate of harvest date on grain losses in rapeseed genotypes
In order to select optimum harvest time for avoid grain losses in cold temperate regions, an experimental design in factorial with randomized completely block were conducted. Experiment treatments were consist of four Genotypes multiple three sowing dates. Genotypes including Colvert, Okapi, Orient and Cobra. So sowing date s were 10, 20 Sep and 2 Oct. The character that measured was grain yield and grain losses in farm in harvest times (physiological ripening about 30-45 percent brown like pods,10, 20 and 30 days after physiological ripening). The results showed that were significant difference (p＜％ 1) among Genotype for grain yield. There were significant difference (p＜％ l) between sowing dates, that In all of times, 1th sowing date and were the most and 3th sowing date were the least in grain yield. Interaction between variety and sowing date on grain yield in 10 days after physiological ripening had significant difference (p＜％ 1). Cobra variety had about 3234.25 kg/ha in 10 Sep, Orient (2982 kg/ha)and Colvert (2948 kg/ha) Genotype were at the second categorize. Orient variety with 1732.25 kg/ha in 2 Oct. had the least grain yield (p＜％ 1). Grain losses of variety at 20 and 30 days after physiological ripening was significant difference (p＜％ 1) and Cobra variety were the most and Okapi variety was the least in loss. Interaction between variety and sowing date on grain losses in 10 days after physiological ripening had significant difference (p＜％ 1). Therefore, Okapi variety at the 1th and 2th sowing date were upper and Colvert variety in 2th sowing date were inverse. Overall, results showed Genotypes sensitivity to grain losses was different in field and sowing date partially affects grain losses.
colza Genotypes sowing date grain yield harvest time
H.Omidi Seyed Ali Mohammad Modares Sanavy
Agronomy Department, Faculty of Agriculture ILam University, ILAM, Iran Agronomy Department, Tarbiat Modares University, Tehran, Iran
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
987-992
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）