【摘要】 为确定饲草燕麦的最佳收割时期,采取田间试验方法,测定分析了‘坝燕3号’燕麦不同生育期的株高、鲜干比、茎叶比、鲜草产量、干草产量及营养成分。结果表明:在晋北旱作条件下,饲草燕麦株高增长符合Logistic模型,鲜干比、茎叶比、干草产量变化符合一元线性回归模型。鲜草产量乳熟期最高,为33777.78 kg/hm~2,干草产量蜡熟期最高,为10184.71 kg/hm~2。干物质中粗蛋白质含量开花期最高,为10.00%,蜡熟期最低,为7.07%。饲料相对值(RFV)乳熟期最高,为95.98,蜡熟期次之,为86.03。综合分析表明,在晋北旱作条件下,饲草燕麦调制青贮饲料时最佳收割期为开花期至乳熟期;调制干草时最佳收割期为乳熟期至蜡熟期。更多还原

【Abstract】 To determine the optimum harvest time for forage oat, the field test method was used to detect and analyze the plant height, dry-fresh ratio and leaf-stem ratio, fresh yield, hay yield, and nutrient composition of oat variety ’Ba Yan No.3’ at different growth stages. The results showed that, in the condition of dry farming in northern Shanxi, the plant height growth of forage oat was consistent with the Logistic model, while dry-fresh ratio, leaf-stem ratio and hay yield were consistent with the linear regression model. The fresh yield was the highest(33777.78 kg/hm~2) at the ripening stage, while the hay yield was the highest(10184.71 kg/hm~2) at the waxing stage. The crude protein content in dry matter was the highest in flowering period(10.00%) and the lowest in waxing period(7.07%). The relative value of feed(RFV) was the highest at the ripening stage(95.98),followed by the waxing stage(86.03). It is indicated that forage oat should be harvested from flowering stage to ripening stage for preparing silage, and harvested from ripening stage to waxing stage for hay under the drought condition in northern Shanxi.更多还原