黄淮海农区集约种植制度的超高产特性研究

 探讨了黄淮海农区冬小麦｜｜早春玉米／夏玉米、早春玉米／夏玉米及冬小麦－夏玉米３种集约种植制度的超高产生产特性。结果表明，冬小麦｜｜早春玉米／夏玉米产量达２０．５２～２１．７９ｔ／ｈａ，间套行又可间套蔬菜生产，增产增效，但该模式时空集约性强，机械化操作难度相对较大；早春玉米／夏玉米产量可达１８．２４～１８．３９ｔ／ｈａ，同时该方式又可纳入春、秋两季蔬菜间套种植，具有粮菜结合，高产高效的特征；采用２０＋４０模式种植冬小麦－玉米两熟，产量可达１８．４７～２０．８９ｔ／ｈａ。３种种植制度单位面积产量比黄淮海农区目前高产吨粮田（１ｔ／６６６．７ｍ２，１５ｔ／ｈａ）增产２１．６３％～４５．２８％，初步实现了粮食进一步高产的新突破。

Studies on the Super-high Yield Characteristics of Three Intensive Multiple Cropping Systems in Huanghuaihai Area

In Huanghuaihai area, three super high yield cropping patterns have been studied:(1 )Winter wheat early spring maize/summer maize;(2)Early spring maize/ summer maize;(3)Winter wheat(wheat rows with a 20cm narrower space and a 40cm broader space)-summer maize. The three patterns, respectively, produced 20515. 50'-21790. 35kg, 18244. 05-18385. 50kg and 18467. 25-20887. 35kg grain per ha . What's more, vegetables could be inter-planted or relay-planted into the former two patterns to increase income. However, comparing with the third pattern, they are less convenient for machinery planting.