在静宁县旱作区观测了冬小麦全膜覆土穴播一膜两年用抗旱增产效果。结果表明，全膜覆土穴播冬小麦头茬折合产量最高，为4 666.7 kg/hm2，较露地条播增产1 272.8 kg/hm2，增产率37.5%；较全膜覆土穴播一膜两年用冬小麦增产11.6%；全膜覆土穴播一膜两年用冬小麦折合产量为4 181.8 kg/hm2，较露地条播增产23.2%。建议在极度干旱条件下，尽量采用全膜覆土穴播一膜两年用技术。

The effect of yield increase and drought resistance of one film be twice used to winter wheat of hole sowing covering siol mulched with film were observed for two years in the arid area of Jingning county， The results showed that winter wheat of hole sowing covering soil mulched with film . The highest yield was 4 666.7 kg/hm2， 1 272.8 kg/hm2 higher than that drilling in bare field， with an increase rate of 37.5% in the first year； the yield was 4 181.8 kg/hm2 and 11.6% higher than that one film be twice used to winter wheat of 23.2% higher than that drilling in bare field . It suggested that teachnology of one film be twice used to winter wheat of hole sowing covering soil mulched with plastic film showed be of stained in extreme drought conditions .

S512.1