The effects of sowing date on plant survive rate and seeds yield of winter rapeseed (Brassica rapa) in Northwest China

摘要

The effects of different sowing dates on over-wintering rate, maturity, yield and oil content of winter rapeseed (B. rapa) were studied. When the seeds were sow on 24th of August, it gave an over- wintering rate of 85.54%, and seeds yield of 3501.75kg/hm2 and oil content in seeds of 43.22%. While the sowing was carried on 14th of September, it gave an over-wintering rate of 5.29% with a late maturity, the seed yield was 133.35 kg/hm2 and the oil content was 37.47%. It suggests that the sowing date had a significant effect on plant survive rate over winter time and the seed yield in winter rapeseed in north-west China.