苕子是我市主要的冬绿肥,每年播种面积都在200万亩以上,但苕种年年供应紧张。过去大面积推广苕麦混播,亩产苕种仅40—50斤,小麦产量也不高。近几年,我们改苕麦混播为苕麦间条播留种,使苕种单产增加30%以上,已在我市大面积推广。 Prickly heat is the main winter green manure in our city, sowing area every year in 2000000 mus of above, but every year species supply nervous. In the past, large-scale promotion of wheat mixed sowing, only 40-50 kg per mu species, wheat yield is not high. In recent years, we have changed the wheat mixed sowing and sowing between the wheat sowing and planting, increasing the yield per sow species by more than 30% and has been widely promoted in our city.