甘肃河西灌区玉米播期对优质小麦与粮饲兼用玉米带田生产能力的影响

优质小麦与粮饲兼用玉米套种是既能生产粮食，又能生产饲料的有效方法，符合农业结构调整的要求。但如果玉米播种过早，小麦与玉米的共生期过长，会出现小麦产量下降，品质变劣等问题。研究了粮饲兼用玉米播期对带田产量和产值的影响，结果表明：将带田玉米安排在4月20日—5月10日播种，总产值最高；期间适当推迟玉米播期至5月5日前后，既不影响粮饲兼用玉米生产，还能提高优质小麦产量，达到增产又增收的目的。

The effects of maize sowing period on productivity of strip farmland growing high-quality wheat and grain-feed corn

It is very effective to interplant high quality wheat with grain feed maize, but if maize is seeded too early, the wheat yield and quality will reduce accordingly In this paper, experiment was conducted to study the effects of maize sowing period on productivity of interplanting strip farmland in irrigation area of Hexi Corridor, which show that sowing maize during 20th of April to 10th of May will achieve the highest total production value If maize sowing period is postponed to about May 5th, it will not affect maize production, but help to improve wheat yield