河套地区不同刈割期对春播饲草大麦产量及品质的影响

Effects of Different Mown Stage on Yield and Quality of Spring Forage Barley in Hetuo Area

为了进一步筛选适宜河套地区种植的优质饲草大麦品种,本研究以12PJ-051,12PJ-007,12PJ-067、12PJ-068为参试材料,以蒙啤麦3号为对照,测定各品种饲草的草产量和营养指标,确定各品种最佳的刈割时期。通过研究表明,随着时间的推移,各大麦品种饲草产量呈现先升高后降低的趋势。12PJ-067在抽穗期刈割效果最佳,鲜草产量2947.78kg/666.7㎡,干草产量显著高于其他品种各个时期(P<0.05),达到564.99kg/666.7㎡,粗蛋白含量14.0%。12PJ-007在灌浆期、乳熟期、乳熟后期,鲜、干草产量均表现最好,鲜草产量均在3000kg/666.7㎡以上,干草产量均在500kg/666.7㎡以上,粗蛋白含量均在12%以上。各品种不同刈割期粗蛋白含量在8.4%~18.5%之间,其中12PJ-007在乳熟期粗蛋白含量最高,达到18.5%,显著高于其他品种的各个时期(P<0.05)。

In order to further screen high-quality forage barley varieties in this region,12PJ-051,12PJ-007,12PJ-067,12PJ-068 were used as test materials and MengPiMai No.3 as control.The forage yield and nutritional indexes of each variety were determined to determine the best cutting time of each variety.The results showed that the forage yield of barley varieties increased first and then decreased with the passage of time.12PJ-067 was the best cutting effect at heading stage,fresh grass yield was 2947.78kg/666.7㎡,hay yield was significantly higher than other varieties in each stage(P<0.05),reaching 564.99kg/666.7㎡,and crude protein content was 14.0%.The fresh and hay yield of 12PJ-007 was the best in filling stage,milk stage and late milk stage.The fresh grass yield was 3000kg/666.7㎡,the hay yield was more than 500kg/666.7㎡,and the crude protein content was more than 12%.The crude protein content of 12PJ-007 was the highest in milk ripening stage(18.5%),which was significantly higher than that of other varieties in each stage(P<0.05).