Foliar nitrogen gives lift to oilseed rape yields

摘要

Applying foliar nitrogen during flowering to oilseed rape crops increases gross output by around 0.24t/ha, according to HGCA-funded research carried out by ADAS. That could be worth as much as 40/ha in extra profit. In three out of four experiments, foliar nitrogen applied at the end of flowering at a rate of 40kg/ha increased seed yield. Yield responses ranged from 0.06t/ha to 0.41t/ha and averaged 0.24t/ha. However, the economic benefits from increased seed yield from foliar nitrogen were offset by a reduction in the percentage of oil within the seed by around 0.9%.