干旱是威胁宁南山区胡麻生产持续发展的首要限制因子。采用地膜覆盖穴播种植技术 ,探索了旱地胡麻覆膜穴播种植的增产机理及其增产效应。结果表明 ,覆膜穴播可以提高土壤地温 ,保持土壤水分 ,促进土壤速效养分的充分释放和有效利用。又因穴播种植 ,胡麻籽粒顶土合力增强 ,出苗率高达 79.4%～ 96.2 % ,籽粒产量提高 37.9%～ 46.2 %。与此同时 ,作者于胡麻覆膜穴播种植后 ,在胡麻的关键生育期枞形后期—现蕾初期 ,进行了膜上节水补灌试验。结果表明 ,节水补灌 30 0～ 450 m3 /hm2可提高籽粒产量 30 %～ 44% ,水分生产效率达0 .30～ 0 .32 kg/(hm2 · mm) ,水分生产效率提高 8%～ 1 4 .9%。这一新的种植方式 ,效益显著 ,应在干旱半干旱地区的胡麻产地大面积推广应用 Drought is the chief limiting factor that threatens the sustainable development of flax in mountainous areas of southern Ningxia. The technology of mulching and planting under mulch was used to explore the yield-increasing mechanism and yield-increasing effect of flax seedling planting in dry land. The results showed that the filming by film mulching could increase soil temperature, maintain soil moisture, and promote the full release and efficient use of available nutrients in soil. Because of planting by planting, the synergy of top soil of flax seeds increased, the germination rate was as high as 79.4% ~ 96.2% and the grain yield increased by 37.9% ~ 46.2%. In the meantime, after the film was planted by flax mulching, the authors conducted a water-saving irrigation experiment on the membrane at the early stage of budding, the early budding stage of flax. The results showed that 30 ~ 44% of grain yield, 0.30 ~ 0.32 kg / (hm2 · mm) of water production efficiency and 8% ~ 1 4 .9%. This new planting method has obvious benefits and should be popularized and applied in a large area in the arid and semi-arid areas