Studies on yield and quality of mixedsown annual forage and feed crops in Yanmenguan region

The yield of the annual forage and feed crops mixture grassland in agropastoral transitional zone of Yanmenguan region in Shanxi was studied. The results showed that the mixture with 50% common vetch + 50% oat was the best among the different mixtures, the yields of grass and crude protein reached 48 525 kg/hm2 and 1 981 kg/hm2, the suitable row spacing was 30 cm, the crude protein of interlacing sowing significantly was higher than the same row sowing. While the grass yields of mixtures with 50% corn + 50% lablab or 50% sorghum hybrid sudangrass+ 50% labla were higher than the single sown of corn or sorghum hybrid sudangrass. The models could get higher grass yield in flat ground and basin region, and the mixture model of oat and vetch was suitable adopted in mountain and hilly region.