论文部分内容阅读
本文通过分析密度试验和高产示范试验的结果,得出以下结论:陕354小麦新品种具有9000kg/hm~2以上的产量潜力;获得9000kg/hm~2以上产量较合适的产量结构为:亩穗数40万(600万/hm~2)、穗粒数40粒、千粒重40g;产量因素中,千粒重对产量的作用最大,穗粒数次之,要夺得高产必须发挥其大穗大粒的优势。其较合适群体动态是基本苗数120～180万/hm~2、冬前总茎数在750～900万/hm~2、最高总茎数1200～1350万/hm~2、有效穗数525～600万/hm~2;应着重把冬前群体控制在适宜范围内,增加冬前群体中大蘖的比例,减少无效分蘖数,提高成穗率,改善中、后期群体的通风透光条件,促进光合产物向籽粒中的转化和分配,达到“穗足、穗大、粒饱”。
Through analyzing the results of density test and high-yield demonstration experiment, the following conclusions are drawn: The new wheat variety Shaan 354 has the yield potential of more than 9000kg / hm ~ 2; the suitable yield structure of more than 9000kg / hm ~ 2 yield is: The number of grain weight is 40,000, the number of grain per spike is 40, and the weight of grain is 40g. Among the yield factors, the effect of 1000-grain weight on yield is the greatest, and the number of grain per spike is several. . The population dynamics of the most suitable group was 120 ~ 1.8 million / hm ~ 2, total stem number was 750 ~ 9 million / hm ~ 2, the highest total stem number was 1200 ~ 13.5 million / hm ~ 2 and the effective spike number was 525 ~ 6000000 / hm ~ 2; should focus on the pre-winter population control in the appropriate range, increase the proportion of large tillers in winter before the group to reduce the number of ineffective tillers, increase the rate of ear, improve the medium and late groups of ventilation and light conditions , To promote the conversion of photosynthetic products to the grain and distribution, to “ear foot, spike, grain full.”