农牧交错带青贮玉米生产性能和饲草品质综合评价

为调节农牧交错带种植结构，筛选出适宜当地种植的青贮玉米品种，本研究以山西朔州引进的18个青贮玉米（Zea mays）为材料，采用灰色关联度法对各品种的生产性能和饲草品质进行评价。结果表明：生产性能方面，‘新饲玉14号’生物产量最高（P<0.05），‘重垦166’株高表现较好，达318.20 cm，穗比重达50%以上的是‘吉单50’和‘屯玉556’。饲草品质方面，‘金岭青贮10’、‘先玉1321’、‘屯玉358’、‘屯玉556’、‘CP1685’、‘东科301’和‘迪卡625’的相对饲用价值（Relative feeding value，RFV）达到一级青贮标准；‘屯玉358’的饲草分级指数（Grading index，GI）值最高。加权关联度综合评价表明‘大京九4059’、‘正大1473’和‘迪卡625’适合在北方农牧交错带种植。

Comprehensive Evaluation of Performance and Forage Quality of Silage Maize in Farming-pastoral Ecotone

In order to adjust the planting structure of farming-pastoral ecotone and screen out silage maize varieties suitable for local planting,18 silage maize (Zea Mays) imported from Shuozhou,Shanxi Province were used as materials to evaluate the production performance and forage quality of each variety by grey correlation degree method. The results showed that in terms of production performance,‘Xinsi Yu No.14’ had the highest biological yield (P<0.05),the plant height of ‘Chongken 166’ was better,reaching 318.20 cm,and the spike proportion of ‘Jidan 50’ and ‘Tunyu 556’ was more than 50%. In terms of forage quality,the RFV values of ‘Jinling Silage 10’,‘Xianyu 1321’,‘Tunyu 358’,‘Tunyu 556’,‘CP1685’,‘Dongke 301’ and ‘Dika 625’ reached the first-grade silage standard. ‘Tunyu 358’ has the highest GI. The comprehensive evaluation of the weighted correlation degree showed that ‘Dajingjiu 4059’,‘Zhengda 1473’ and ‘Dika 625’ were suitable for planting in the farming-pastoral ecotone in north China.