不同刈割期对春播、秋播燕麦干草产量和品质的影响

本试验以秋播燕麦科燕1号、UITIMA、白燕9号、T045和春播燕麦科燕1号、白燕5号、白燕9号、Dancer为研究对象,测定其产量并对其营养品质指标进行分析,探讨关中地区春播燕麦和秋播燕麦越冬返青牧草最佳刈割时期。通过研究发现随着时间的推移,各燕麦品种鲜重、干重均呈现逐渐积累的趋势。秋播燕麦科燕1号抽穗期刈割表现最佳,其鲜重显著高于其他品种各时期(P≤0.05),达到1625 g/m²,干草产量于灌浆期达到最大值524 g/m²;粗蛋白含量达到12%。春播燕麦白燕9号拔节期刈割表现最佳,鲜草产量0.73 kg/m²,干草产量0.16 kg/m²;粗蛋白含量为15.42%。各品种燕麦不同时期刈割蛋白质含量在9%~19%。科燕1号、白燕5号、白燕9号、Dancer在拔节期刈割,蛋白质含量显著高于其他时期(P≤0.05):19%、10%、15%、14%。

Influence of mowing time on yield and quality of spring and autumn sown oat hay

A experiment was carried out to determine the effect of cutting time on yield and nutritional quality of autumn oat (varieties were Keyan1,T045,UITIMA,Baiyan9)and spring oat (varieties were Keyan1,Baiy-an5,Baiyan9,Dancer)in determine the best cutting time for autumn and spring sown oats in the Guanzhong area.The results showed that fresh weight and dry weight of all varieties increased over time.Autumn sown Keyan 1 produced the best yield when cut at the heading stage,(P ≤0.05;fresh yield was 1625 g/m2 and hay yield was 524 g/m2 and crude protein content was 12%.Spring sown Baiyan 9 has the best performance when cut at the jointing stage when fresh yield was 0.73 kg/m2 ,hay yield 0.16 kg/m2 and protein content,15.42%. Protein contents of different varieties ranged from 9% to 19% across cutting times.Protein contents of Key-an1,Baiyan 5,Baiyan 9,and Dancer were 19%,10%,15%,14%,respectively and significantly higher when cut at the jointing stage (P ≤0.05)compared with other cutting times.