西北旱区16个饲用玉米引种筛选试验初报

选择不同的饲用、兼用型玉米品种(系)16个,用已在西北地区推广种植的粮饲兼用品种(陇单4)做对照,进行引种试验,通过观察其生育期,测定不同时期的株高、茎粗、农艺性状、鲜草产量、干草产量等,筛选适合甘肃定西旱区的饲用玉米品种。结果表明:饲用玉米品种陇引3号(农大375)、陇引7号(瑞德1号)、陇引8号(瑞德2号)从拔节期到收获期,株高的日均生长速度均快于对照组(陇单4号),而鲜草产量和干草产量也均高于对照组,但差异不显著(P>0.05),陇引3号(农大375)、陇引7号(瑞德1号)和陇引8号(瑞德2号)的鲜草产量分别为64.54、65.12和68.19 t/hm^2,与对照组(陇单4号)相比,每公顷增产15.41～28.88 t,增幅达18.65%～34.94%。综合分析认为,陇引3号(农大375)、陇引7号(瑞德1号)、陇引8号(瑞德2号)可作为在甘肃定西旱区的初选品种进行推广种植。

Preliminary Report on Introduction and Selecting Experiment of Forage Maize in Northwest Arid Area

In this study,sixteen different forage and dual-use maize varieties(lines)were selected and compared with Longdan 4,which has been widely planted in Northwest China.In order to screen feeding maize varieties suitable for dry areas of Dingxi,Gansu,the suitable selection was made by observing their growth period,plant height at different stages,stem diameter at different stages,agronomic traits,fresh grass yield and hay yield.The results showed that the average daily growth rate of plant height of feeding maize varieties Longyin No.3(Nongda 375),Longyin No.7(Reed No.1)and Longyin No.8(Reed No.2)was faster than that of the control group(Longdan No.4)from jointing to harvest,while the fresh grass yield and hay yield were higher than those of the control group,but the difference was not significant.The fresh grass yields of Longyin No.3(Nongda 375),Longyin No.7(Ruide No.1)and Longyin No.8(Ruide No.2)reached 64.54,65.12 and 68.19 t/hm^2,respectively,which increased by 15.41-28.88 t/hm^2 with an increase of 18.65%-34.94%compared with that of Longyin No.4.Comprehensive analysis shows that Longyin No.3(Nongda 375),Longyin No.7(Ruide No.1)and Longyin No.8(Ruide No.2)are selected as primary varieties to be popularized and planted in the arid areas of Dingxi,Gansu Province.