| Evaluation on production and nutritional value of 13 introduced alfalfa cultivars in Hexi corridor of Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2019.05.18 |
| Key Words: Alfalfa introduced cultivars production performance nutritional value grey correlation degree analysis |
| Author Name | Affiliation | | LI Yu-zhu | Pratacultural College, Gansu Agricultural University，Key Laboratory of Grassland Ecosystem, Ministry of Education，Sino-U.S.Centers for Grazing Land Ecosystem Sustainability, Lanzhou, Gansu 730070, China | | WU Fang | Pratacultural College, Gansu Agricultural University，Key Laboratory of Grassland Ecosystem, Ministry of Education，Sino-U.S.Centers for Grazing Land Ecosystem Sustainability, Lanzhou, Gansu 730070, China | | SHI Shang-li | Pratacultural College, Gansu Agricultural University，Key Laboratory of Grassland Ecosystem, Ministry of Education，Sino-U.S.Centers for Grazing Land Ecosystem Sustainability, Lanzhou, Gansu 730070, China | | BAI Xiao-ming | Pratacultural College, Gansu Agricultural University，Key Laboratory of Grassland Ecosystem, Ministry of Education，Sino-U.S.Centers for Grazing Land Ecosystem Sustainability, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Thirteen introduced alfalfa cultivars including 55V12, 54V09, Magna Graze Ⅱ, Magna Graze Ⅶ,Vision, WL319HQ、WL366HQ、WL363HQ、WL354HQ、WL298HQ、WL440HQ、WL353LH and WL326GZ were used as research materials in Hexi Corridor of Gansu Province. In this paper, the plant height, hay yield, leaf-stem ratio, dry matter, crude protein, neutral detergent fiber, acid detergent fiber, calcium and phosphorus of alfalfa were measured and analyzed at the initial flowering stage of first-year, second-year and third-year alfalfa. The production and nutritional value of thirteen alfalfa cultivars were comprehensively evaluated by the grey correlation degree analysis. The results showed that the annual average plant height of Vision was the highest at 74.63 cm while 55V12 was lowest at 67.24 cm. The WL363HQ showed the highest total dry yield (19 169.08 kg·hm-2), the 55V12 was the lowest at 15 020.64 kg·hm-2. The leaf-stem ratio of WL366HQ was the highest(0.73), however, the Magna Graze Ⅶ was the lowest at 0.65. The annual average dry matter of WL354HQ was the highest at 93.78%, and annual average crude protein of WL363HQ was the highest(18.10%). The annual average neutral detergent fiber and acid detergent fiber of WL366HQ were the lowest at 38.95% and 29.45%. The Magna Graze Ⅶ showed the highest annual average calcium(1.88%), and the annual average phosphorus of WL354HQ was the highest(1.13%). The relative feed value of WL366HQ was the highest at 159.91, but the relative feed value of 55V12 was the lowest at 140.83. Through grey correlation degree analysis, the WL366HQ, WL353LH, WL363HQ and WL354HQ had better comprehensive traits and were suitable for promotion and utilization in Hexi Corridor. Vision, WL319HQ, WL326GZ, WL440HQ, Magna Graze Ⅶ, 54V09,WL298HQ and Magna Graze Ⅱ had moderate comprehensive traits, which needed further cultivation and observation in this area; but 55V12 had poor comprehensive traitsand should be given careful consideration when introduced. |
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