摘要： 通过青莜麦"双季栽培"技术的研究,选用适宜品种和最佳播种期,并在生产上广泛推广和应用,为养殖业提供优质饲草料以及提高奶牛产奶量,提供理论依据.试验设品种和播种期两因素,采用随机区组设计,3次重复.结果表明:晚熟品种的叶片数为9片,比早熟品种增加2片;从叶面积系数上,晚熟比早熟品种在第二季比第一季分别高1.0～1.08;从光合生产率上,晚熟比早熟品种的孕穗至抽穗期分别高0.17～1.2 g/(m²·d);从光合势上,分别提高21 72.57～23 370.09m²·d;从全株干质量上,分别提高0.7～1.01 g/株;从产草量上,内农大莜1号和莜2号比对照增产45.83%～53.51%和41.7%～49.12%;第二季播种期以7月20日的产草量75 537.8 ks/hm²最高,比对照分别增加7.95%和38.87%,"双季栽培"青莜麦产草量达150 000 kg/hm²;从籽实产量上,内农大莜1号产量达3 789.8 kg/hm²,比对照增产2.33%～7.71%,从饲草和籽实的营养成分,内农大莜1号和莜2号均比其他莜麦品种的高,比饲用玉米亦高.选用内农大莜1号和莜2号高产、优质新品种,第一季顶凌播种,第二季7月20日为最佳播种,在生产上广泛推广和应用,为养殖业提供饲草料,开辟了又一条新的途径.

关键词: 青莜麦, 双季栽培, 产质量, 光合特性

Abstract: Through the research of ″ the double2cropping cultivation″,selects the suitable variety and the best sowing time,spread and application in production,improving the yield of forge green oat and quality of milk production in dairy cow,provides the theory basis. This experiment designed two factors of the variety and the sowing time,used the random² ized region design,three repetitions. The result indicated that :the number of leaves of late mature varieties was nine,more than two premature varieties. Seeingfrom the leaf area index,the late mature varieties were higher than premature varieties in the second quarter and in the first quarter 1106 to 1108. Seeing from the photosynthetic production rate,at boot stage and heading stage,the late were higher respectivly than premature varieties 0117 to 1126 g/ (m²· d). From the leaf area duration,improved respectively 21 762157 to 23 370109 (m²· d). From the whole plant dry weight,improved respectively 0176 and 1101 g evey plant. For herbal yield,number 1 and number 2 naked oat of Inner Mongolia Agricultural University increased respectively 45180 % and 41170 % than late mature varieties,than premature varieties 53150 % and 49110 %. In sowing dates of the second quarter,the highest yields 75 53718 kg/ ha appeared on July 20,compared with the control increased 38187 % and 76195 %. The yield of forage green naked oat double2cropping cultivation amounted to 150 000 kg/ ha. From seed production,number 1 naked oat of Inner Mongolia Agricultural University amounted to 3 78918 kg/ ha,increased 66170 % than late mature varieties and 26130 % than premature varieties.And the nutritional ingredientsof for2 age grass and seed of number1 and number 2 were higher than other oat varieties,so as the forage maize. T o sum up, choose new and premium varieties number 1 and number 2 naked oat sowed before soil thawed during the first quarter,the second quarter on July 20 as the best seeding,and use and widespread them in the production will pioneer a way for prO₂ viding forage for aquaculture industry.

Key words: Forage green naked oat, Double2cropping cultivation, Production and quality, Photosynthetic character

中图分类号: 

• S512.6