14个紫花苜蓿品种草产量及营养品质的综合评价

Comprehensive evaluation of yield and nutritionalquality of 14 Alfalfa Varieties

摘要:

为筛选出适宜安徽江淮地区种植的优势品种,对来自美国的14个紫花苜蓿品种进行了连续3年的田间引种比较试验,利用方差分析和灰色关联度分析,综合评价了不同苜蓿品种连续种植3年的草产量及营养品质。结果表明:鲜干草产量,正道440表现最好,均值分别为2.61 kg/m²和0.61 kg/m²,中性洗涤纤维含量、酸性洗涤纤维含量表现较好,均值分别为42%和32.5%。但其粗蛋白含量较低,仅为16.5%;正道656,354和903等品种在粗蛋白含量、中性洗涤纤维含量、酸性洗涤纤维含量等方面表现突出,品质较好,其中,354的鲜干草产量表现也很突出,正道656次之。经过灰色关联度综合评价后,正道656最接近理想品种,其草产量及营养品质的均值分别为:鲜草产量2.1 kg/m²、干草产量0.47 kg/m²、粗蛋白20.4%、中性洗涤纤维35.0%、酸性洗涤纤维26.3%,其次较突出的品种依次是正道440、354、525、903,以上5个品种均适宜在当地推广种植。

Abstract:

Field comparative experiments of fourteen alfalfa varieties from the United States for three consecutive years were carried out in order to screen out the dominant varieties suitable for planting in Jianghuai area of Anhui Province.Both yield and nutritional quality of different alfalfa varieties in three years were comprehensively evaluated by variance and grey correlation analyses.The results showed that: ZD440 was the best in fresh yield and hay yield,the mean values were 2.61 kg/m² and 0.61 kg/m²,respectively.In neutral detergent fiber (NDF) and acidic detergent fiber (ADF) contents was also significantly improved,the mean values were 42% and 32.5%,respectively,but the crude protein content was relatively low,only 16.5%;ZD656,354 and 903 were significantly rich in crude protein,NDF and ADF contents,with higher quality.Among them,354 was also superior in fresh and hay yields,followed by ZD656.After comprehensive evaluation of grey correlation degree,ZD656 was the closest to the ideal variety,the mean values of yield and nutrient quality were: fresh yield 2.1 kg/m2,hay yield 0.47 kg/m²,crude protein 20.4%,NDF 35.0% and ADF 26.3%.The next most prominent varieties were ZD440,354,525 and 903.The above five varieties are suitable for local planting.