宁夏雨养区不同青贮玉米品种生产性能及营养价值综合评价

Comprehensive evaluation of production performance and nutritional value of different silage corn varieties in Ningxia rain-fed area

为筛选适宜宁夏雨养区种植的青贮玉米品种,试验采用随机区组设计,对引进的8个青贮玉米品种农艺性状和营养成分进行综合评价。结果表明:8个青贮玉米品种间的株高、穗位高、茎粗、叶片数、鲜草产量、干物质、粗灰分、粗蛋白、粗脂肪以及淀粉含量均差异显著(P<0.05)。中玉335及宁单34的生物学产量较高,且茎秆较为粗壮。中玉335、正大12及宁单34的干物质含量适中,粗蛋白、粗脂肪以及淀粉含量较高且中性洗涤纤维和酸性洗涤纤维含量较低,品质较好。对农艺性状和营养成分进行综合评价,中玉335和宁单34表现优良,适宜在当地推广种植。

In order to screen the silage corn varieties suitable for planting in the rain-fed area of Ningxia,this experiment comprehensively evaluated the agronomic characteristics and chemical components of eight introduced silage corn varieties using a random block design.The results showed that there were significant differences in plant height,ear height,stem diameter,leaf number,fresh grass yield,dry matter,crude ash,crude protein,crude fat and starch content among eight silage corn varieties(P<0.05).Among all varieties,the biological yields of Zhongyu 335 and Ningdan 34 were relatively higher with relatively thicker stems;while Zhongyu 335,Zhengda 12 and Ningdan 34 had high quality showing higher crude protein,crude fat and starch content,and lower neutral detergent fiber and acid detergent fiber content though their dry matter was moderate.Comprehensive evaluation of agronomic traits and chemical components showed that Zhongyu 335 and Ningdan 34 had good quality and therefore would be suitable for local promotion.