论文部分内容阅读
从我省玉米品种十余年的发展,会发现一个值得深思的问题:丹玉13自1984年引进推广后,历经十年不衰。以新乡市为例,到1994年面积仍在41.4万亩,占全市玉米面积的24％。其间省及各地市相继推广过不少品种,只有掖12、13号两个品种推广面积逐步增大,其它都未能取代丹玉13的当家位置。通过对比分析丹玉13之所以长期作为当家品种,除了其产量稳定、抗病、抗逆性强等因素外。生育期相对较长或适宜是一个重要因素。所以,我们认为玉米品种生育期应作为选择推广品种重要依据之一。
From the development of more than ten years of corn varieties in our province, we can find a question worth pondering: Since its introduction in 1984, Dan Yu 13 has not declined after ten years. To Xinxiang City, for example, by 1994 the area is still 414000 acres, accounting for 24% of the city’s corn area. In the meantime, the provinces and cities around the city have promoted many varieties in succession. Only the promotion area of the two varieties of Yedi 12 and 13 gradually increased, and others failed to replace the position of Dan Yu 13. Through the comparative analysis Dan Yu 13 long-term as a headed species, in addition to its stable yield, disease resistance, resistance and other factors. Relatively long or suitable growth period is an important factor. Therefore, we believe that maize varieties should be the growth period as one of the important basis for selection of varieties.