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大麦（Hordeumvulgarel）麦粒的蛋白质含量来自于植物N的再转移以及在麦粒灌浆期间N的不断摄入与固化作用。本实验的田间试验在mcGill·大学的E·A·Lods农业研究中心进行，选用Bearbrook土壤（细粒、混合、非酸性，低温的Humaquept）以研究肥料N对麦粒和作物N的蓄积，植物N的再转移和抽穗以后N的摄入的影响，以及评价开花以后N的摄入对决定麦粒蛋白质进度（GPC）的重要性。所选用的大麦品系为“cadette”和“leger”（二种可饲大麦）以及“Argyle”（不可饲的制麦芽用大麦），在大麦播种时，撒施NH4NO3，其N水平分别为：0，50，100，150和200公斤N／公顷。另外二种处理是在播种时按100公斤N／公顷施用NH4NO2和在出芒后6～10天使用NH4NO3（撒施）或尿素（叶面喷液）。在1988和1989年，植物N向麦粒的再转移通常因N施用量增加而降低，但在1990年恰好相反。在所有年份，随肥料N水平的增加植物N转移到麦粒的比例降低。抽穗以后N的摄入与固化作用随肥料N的增而升高，可能是麦粒N的主要来源。GPC的大麦品系差异与N的总摄入量，麦粒N，N经济指数和抽穗后的表观N摄入或N再转移没有关系。
The protein content of the kernels of Hordeum vulgarel is derived from the redistribution of plant N and the constant uptake and solidification of N during grain filling. Field experiments in this experiment were conducted at the A.L. Lods Agricultural Research Center at McGill University using Bearbrook soil (fine, mixed, non-acidic, low temperature Humaquept) to study the accumulation of N in grains and crop N by fertilizer N, N re-transfer and N uptake after heading, and assess the importance of N uptake after flowering to determine grain protein progress (GPC). The selected barley lines were “cadette” and “leger” (two for barley) and “Argyle” (for barley for malting). When barley was sown, NH4NO3 was sprinkled with N levels of 0 , 50, 100, 150 and 200 kg N / ha. The other two treatments were application of NH4NO2 at 100 kg N / ha at planting and NH4NO3 or urea (foliar spray) 6 to 10 days after emergence. In 1988 and 1989, the retransfer of plant N to the grain usually decreased due to the increased use of N, but the opposite was true in 1990. In all years, the proportion of plant N transferred to grains decreased with increasing N level of fertilizer. After heading, the uptake and curing of N increased with the increase of N fertilizer, which may be the main source of N in grains. Differences in GPC barley lines are not related to the total N intake, the N, N economic index of grain and apparent N uptake or N retransfer after heading.