青莜麦双季栽培和麦茬复种技术的研究

青莜麦不同品种和播期的试验结果表明:第一季青莜麦比第二季晚熟品种的株高、叶面积系数均高;品种323和82的单季产草量达87544.5kg/hm2和85042.5kg/hm2,双季比单季增产68.0%~81.2%。麦茬复种青莜麦产草量达64500~67500kg/hm2;并以7月20日为最佳播种期,比其他播期增产38.9%~77.0%。品种323籽粒产量3789.8kg/hm2,比对照增产26.3%~66.7%,其粗蛋白质、粗脂肪含量均比对照高;麦茬复种青莜麦比复种青玉米的粗蛋白质和粗脂肪含量高。选用品种323和82进行双季栽培或麦茬复种青莜麦,可取得显著的经济、社会和生态效益。

Double-season Cultivation of Green Naked Oat Forage and the Study on Its Re-cultivating Technology on Wheat Stubble

The experiments with different green naked oat species and sowing time showed that the average plant height and leaf area of first season naked oat were higher than that of the cultivars sowed in second season and the grass yields per hectare of new cultivars 323 and 82 in one season were respectively 87544.5kg and 85042.5kg and yield of double-season green naked oat increased by 68.0%~81.2% compared with the yields of that of single season.The yields of re-cultivated naked oat on wheat stubble were 64500~67500kg per hectare when they were sowed on July 20 which was the best sowing time,the yield increased by 77.0%~38.9% compared with other sowing time.The seeds yields of the new cultivar 323 was 3789.8kg per hectare which increased by 66.7%~26.3% compared with control.Its crude protein and lipid were higher than that of control and that of re-cultivated naked oats on wheat stubble were higher than that of re-cultivated maize.All these data showed that choosing the new cultivars 323 and 82 for double-season cultivation or re-cultivating naked oats on wheat stubble could significantly increased economic,social and ecological benefit.