河西地区几种多年生栽培牧草的产量比较

Yield comparison of several perennial cultivated forages in Hexi corridor

通过对几种栽培饲草盛产期生产力水平试验，筛选出适宜河西地区高水肥条件下栽培的多年生饲草种类为松香草Silphium perfoliatum、紫花苜蓿Medicago sativa、百脉根Lotus corniculatus、无芒雀麦Bromus inermis，干草产量依次达到30120、21179、20679和25024kg／hm^2；粗蛋白产量分别达到6174．6、5083．4、4756．2和2628．0kg／hm^2，无氮浸出物达到8478．4～11911、4kg／hm^2。在河西地区每年刈割3茬产量最高，干草产量比刈割2茬提高7．4％～20．6％。鲁梅克斯Rumexacetosa、披碱草Elymus dahuricus高感白粉病和黑粉病，大面积栽培需要加强病害防治或更新抗病品种。

Through experiment on the productive levels of several cultivated forages in high yielding period, perennial forages selected to be suitable to grow in the high fertility and water conditions in Hexi region were Sil phiurn per f oliaturn . Medicago sativa . Lotus corniculatu.; . Brornus inerrnis , hay yield reached 30 120,21 179,20 679 and 25 024 kg/hm^2 seperately; Crude protein yield reached 6 174.6, 5 083.4,4 756.2 and 2 628.0 kg/hm^2; Nitrogen free extract reached 8 478.4-11 911.4 kg/hm^2. In Hexi region, 3 cuts each year yielding best, hay yield was 7.4%-20. 6% higher than that of 2 cuts. Rurnex acetosa ,Elyrnus dahuricus were high susceptible to powdery mildew and smut, for cultivation in big areas, attention should be paid to disease control or renewal of varieties.