论文部分内容阅读
根据不完全的文献资料,仅在19501957年至年间,苏联在玉米与其他作物间作方面的研究就进行了50多个试验。这些试验的结果各不相同。在6个试验中间作玉米的产量比单作高。在7个试验中,没有得到肯定的结果,在某些情况下间作玉米的产量比单作高;而在另一些情况下则间作的产量比单作低一些,但总产量比对照高。在另外27个试验中,玉米的产量
According to incomplete literature, the Soviet Union conducted more than 50 trials of maize intercropping with other crops only between 1950 and 1957. The results of these trials vary. Yields were higher for maize than for monoculture in the six trials. In seven trials, no positive results were obtained, with intercrop corn being higher in some cases than in monoculture; in others, intercrop yields were lower than in monoculture but total yields were higher than in controls. In another 27 trials, corn production