研究证明:土壤基础肥力差,而化肥施用量又少、品种老化混杂、亩穗数严重不足是影响目前西藏春青稞大面积丰产的主要限制性因子。并依次提出了在广大中低产农区应以增施化肥和有机肥为主要增产措施,同时要适当增加播量,改进播种质量,提高出苗率,以保证群体的足够穗数;在一般中产农区应更换品种和增施化肥并重;随着肥力的进一步提高,耐肥高产品种的选用尤为突出。 Studies have shown that: the basic soil fertility is poor, and the application of chemical fertilizers less, mixed varieties aging, severe shortage of acres per acre is the impact of large-scale bumper yield of Tibet Spring is the main limiting factor. And put forward in the middle and low yield areas should be based on the increase of fertilizers and organic manure as the main measures to increase production, while appropriate to increase the amount of sowing, improve sowing quality and increase the emergence rate in order to ensure adequate population spike number; Areas should be replaced with varieties and fertilizers both; with the further improvement of fertility, the selection of high-resistant varieties of high yield is particularly prominent.