论文部分内容阅读
1979年,我们在北京郊区进行了春播、套种(品种均为京白10号、京杂6号、中单2号)和夏播(京白107、京黄113、京早7号)玉米杂交种适期收获的研究。同时还进行了不同收获方式对产量影响的研究。我们采用的春播、套种和夏播的6个品种,其籽粒最大千粒重大致都出现在雌穗受精后39—45天,即蜡熟末期前后。但由于各类玉米灌浆阶段所处的外界气温条件不同,对玉米籽粒千粒重变化有明显的影响。春播玉米以蜡熟末期产量
In 1979, we conducted spring sowing in the suburbs of Beijing, interbreeding (varieties Jingbai 10, Jingza 6, Zhongdan 2) and summer sowing (Jingbai 107, Jinghuang 113, Jingzao 7) Study on the appropriate harvest. At the same time also carried out different harvesting methods on the yield impact of the study. We use the spring sowing, intercropping and summer sowing of six varieties, the largest grain weight of most of them appear in the spike 39-45 days after fertilization, that is, before and after the wax maturity. However, due to the different external temperature conditions in various types of corn filling stage, the changes of 1000-grain weight of maize grains have obvious effects. Spring sowing of corn to the end of the wax production