Evaluation for the productive adaptability of 22 alfalfa varieties in Yongdeng region of Gansu Province
Taking 22 alfalfa varieties with widely cultivation and strong production performance in Gansu as experimental materials,the productive adaptability invovling the yield and quality of different varieties were comprehensively evaluated and compared in Yongdeng region.The results showed that the highest forage pro-duction was Gannong No.4(17 537.0 kg/hm2),followed by Derby (16 610.8 kg/hm2)and Gannong No.5 (16 356.7 kg/hm2),the forage of production of Longdong alfalfawas the lowest(10 220.0 kg/hm2).The alfalfa variety with highest plant height was Reindeer(88.1 cm),followed by Algonquin(84.6 cm)and Zhongmu No.1 (83.7 cm),the height of Longzhong alfalfawas the lowest(65.2 cm).The alfalfa variety with fastest growth speed was Reindeer(1.39 cm/d),followed by Algonquin(1.33 cm/d)and Zhongmu No.1 (1.31 cm/d),the growth speed of Longzhong alfalfawas the slowest(0.99 cm/d).The alfalfa variety with highest crude protein content was Suntory(18.51%),followed by the North star(18.24%)and Reindeer(17.77%),the crude protein content of Plato was the lowest(15.35%).The alfalfa variety with lowest acid detergent fiber content was Sun-god(33.38%),followed by the King of alfalfa(33.40%)and Queen(33.58%),the acid detergent fiber content of Gannong No.1was the highest(40.04%).The alfalfa variety with lowest neutral detergent fiber content was Longdong alfalfa(41.6%),followed by Gannong No.3(41.9%)and Sun-god(42.5%),the neutral detergent fi-ber content of Gannong No.8 was the highest(48.7%).The alfalfa variety with highest crude ash content was Reindeer(1 1 .3 9%),followed by Gannong No.3 (1 1 .2 9%)and Zhonglan No.1 (1 1 .1 7%),the crude ash content of Queen was the lowest(9.64%).The alfalfa variety with highest crude fat content was North star(2.41%), followed by the Zhongmu No.1(2.34%)and Sun-god(2.33%),the crude fat content of Gannong No.1was the lowest(1.77%).The comprehensively evaluation showed that Gannong No.4,Derby,Gannong No.5,Algon-quin,Longdong alfalfa,Queen and Zhongmu No.1 had higher performance of yield and quality in the 22 varieties and these varieties have potential values for application in Gansu irrigation regions.