Studies on the effects of seedling cutting treatment on plant characters of maize

• 1、Key Laboratory of Crop Growth Regulation of Hebei Province/College of Agronomy, Agricultural University of Hebei, Baoding 071001
• 2、 Pangu agricultural machinery manufacturing company, Langfang 065000

Abstract：In order to study the effects of seedling cut on stem traits and yield of maize, field experiments were conducted in Niguantun, Langfang, Hebei province in 2016-2017. Maize varieties used were Zhengdan 958 and Heyu. Maize seedling was cut by machine at the stage of 5 leaf appeared, and 3-4 leaves were cut just above the first leaf, the maize without leaf cutting was taken as control. The morphological and physiological indexes of maize were observed at different growth stages, and the yield was measured in maize harvest period. The result showed that compared with the control, the ear height and the center of gravity of the 2 varieties decreased by 12cm and 6.5cm with the treatment of seedling cut, and the basal stalk became thinner, but the puncture resistance increased, and the green retention of the leaves in the late grain filling stage was significantly better than that of control. The yield measurement results showed that the number of harvested ears increased significantly, the grain weight per ear increased, the average yield increased by 24% for seedling cutting treatment, and the technique of increasing the yield by seedling cut was worth further studying.

Keywords： Maize seedling cut growth and development yield stem characters