宁夏灌区覆膜穴播小麦栽培技术问题的分析及对策

An Analysis of Cultivation Technique of Bunch Planting Mulch Wheat in Irrigation Area of Ningxia and Countermeasures

宁夏灌区１９９６年种植的０．４万ｈｍ２覆膜穴播小麦增产效果差异显著。分析认为：在栽培中还存在着诸如个体与群体的协调、后期早衰、麦套玉米的促控矛盾、施肥未尽合理等问题，使覆膜穴播小麦的增产潜力还远远没有挖掘出来。因此，应改进施肥方法，采用合理的群体结构，从播种机械与肥水促控上、不同的栽培途径上解决小麦后期早衰等问题。

The increase of the yield of bunch planting mulch wheat of 4000ha.grown in irrigation area of Ningxia in 1996 varies significantly.We think that there are still some problems existing such as the coordination between individual and population,early aging in late phase,contradiction between promotion and regulation with interplanting of wheat and corn and irrational application of fertilizer.So we suggest that fertilizer application should be improved,rational population structure should be adopted and early aging in the late phase should be prevented through a change in sowing machine,promotion and regulation between fertilizer and water and various cultivation techniques in order to gain a high yield and high efficiency.