榆林风沙草滩区不同紫花苜蓿品种生产性能及营养品质的综合评价研究

Comprehensive Evaluation on Production Performance and Nutritional Quality of Different Alfalfa Varieties in the Sandy Grassy Beach Area of Yulin

为筛选出适合榆林风沙草滩区大力种植推广的紫花苜蓿品种,本试验对10种紫花苜蓿品种进行生产性能和营养品质综合评价。结果表明,中苜2号、WL343品种的鲜草产量和干草产量在各茬均较高;中苜2号、WL343和巨能551品种的株高在各茬均较高;金黄后相比较其余苜蓿品种,其茎粗较粗;中苜2号、巨能551、金黄后的茎叶比值在各茬均较小;中苜2号、WL343、金黄后3个品种在各茬表现出较快的生长速度;中苜2号、甘农3号品种的粗蛋白含量在各茬显著高于其余苜蓿品种(P<0.05);中苜2号、金黄后的粗脂肪含量整体上显著高于其余苜蓿品种(P<0.05);中苜2号、WL343、金黄后、甘农3号的粗灰分含量、中性洗涤纤维含量、酸性洗涤纤维含量整体上显著低于其余苜蓿品种(P<0.05);中苜2号、WL343、金皇后相比较其余苜蓿品种具有较高的饲喂价值,研究还发现,随着刈割茬次数的增多,各个苜蓿品种的生产性能这营养品质显著下降(P<0.05)。综合评价的结果表明,中苜2号苜蓿品种的生产性能和营养品质最优,其次WL343、金皇后,说明这3种苜蓿可在榆林地区大面积种植推广。

In order to select the alfalfa varieties suitable for planting and promotion in the sandy grassy beach area of Yulin,this experiment comprehensively evaluated the production performance and nutritional quality of 10 alfalfa varieties.The results showed that the fresh grass yield and hay yield of Zhongmu No.2 and WL343 varieties were higher in each crop.The plant height of Zhongmu No.2,WL343 and Juneng 551 varieties were higher in each crop.Compared with other alfalfa varieties Jin Queen,the stem thickness is thicker.The ratio of stem and leaf after Zhongmu No.2,Juneng 551 and Jin Queen were smaller in each crop.The three varieties Zhongmu No.2,WL343 and Jin Queen showed faster growth rate in each crop.The crude protein content of Zhong mu No.2 and Gannong No.3 in each crop was significantly higher than that of other alfalfa varieties(P<0.05).The crude fat content of Zhongmu No.2 and Jin Queen was significantly higher than that of other alfalfa varieties on the whole(P<0.05).The crude ash content,neutral detergent fiber content and acid detergent fiber content of Zhongmu 2,WL343,Jin Queen and Gannong 3 were significantly lower than those of other alfalfa varieties on the whole(P<0.05).Compared with other alfalfa varieties,Zhongmu No.2,WL343 and Jin Queen had higher feeding value.It was also found that the production performance and nutritional quality of each alfalfa variety decreased significantly with the increase of cutting times(P<0.05).The results of comprehensive evaluation showed that the production performance and nutritional quality of Zhongmu No.2 alfalfa were the best,followed by WL343 and Jin Queen,indicating that these three alfalfa varieties could be widely cultivated in Yulin area.