Effects of Planting Density on Kernel Filling and Dehydration Characteristics for Maize Hybrids

doi:10.11924/j.issn.1000-6850.2013-1102

Abstract

Abstract: The object of this study is to research the effect of planting density on kernels filling rate, dehydration rate, yield of maize hybrids, explore the correlation between kernels moisture content of physiological maturity and grain kernels rate or dehydration rate, then establish close planting mode of maize yield and high quality. This experiment was conducted in split-plot design, planting density and maize varieties. Planting density (60000, 75000, 90000, 105000 plant/hm²) were four levels.‘Lvdan 2’,‘Suiyu 10’,‘Xinxin 1’,‘Demeiya 3’,‘Jidan 27’,‘Nendan 11’were determined for kernels filling rate, dehydration rate, kernels moisture content, yield and yield related character in different periods. The results showed that‘Lvdan 2’90000 plant/hm²,‘Dmeiya 3’105000 plant/hm² stop grouting after pollination 55 days. Other maize varieties were not obvious between 56-60 days and 61-65 days after pollination.‘Lvdan 2’75000 plant/hm² kernel moisture content was lower than other planting density treatments (P＜0.05);‘Demeiya 3’75000 plant/hm² kernel dehydration rate performance unimodal curve trend, kernel dehydration rate reached peak after pollination 51-55 days. The yield of 105000 plant/hm² of 6 maize hybrids was respectively lower than other treatments. Consideration kernels filling rate, dehydration rate and yield,‘Xinxin 1’,‘Suiyu 10’60000 plant/hm²,‘Lvdan 2’,‘Demeiya 3’,‘Jidan 27’75000 plant/hm² were the best planting density;‘Neidan 11’was not sensitive to planting density.

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