The Research On Relationships Between Plant Density And Yield As Well As Content Of Manganese And Magnesium In Maize Grain

As maize was the main crop of Jilin Province, the maize yield increase wasimportant to deal with food security. However, nutrient deficiency of high yield grainbecame common and serious. In this paper, we set a two-year field experiment atJilinUniversity daxi farm to explore the grain yield and manganese, magnesium contentchanges in different plant densities. The results as follows:In2010experiment, the grain yield of hybrid CI6502increased atfirst and decreased afterwards with the plant densities increased. It reached the peak at70000plant/hm2planting density, with significant difference (p <0.05). The hybridM753had the same trend, but without significant difference (p <0.05). In2011experiment, the grain yield of the two hybrid also had the similar trend, and reached thepeak at70000plant/hm2planting density, with significant difference (p <0.05). In2010,the grain manganese content of CI6502varieties showed a decreasing trend with theplanting density increased. The same trend appeared in2011, and the differences werestatistically significant (p <0.05). the grain manganese content of M753varieties hadthe same trend, and the differences were also statistically significant (p <0.05). Thechange of magnesium content was similar to manganese, the differences weresignificant (p <0.05) except M753in2011. The manganese uptake had the same trendto yield. The difference of the two hybrid in two years experiments all reachedsignificant (p <0.05). The trend of magnesium uptake was similar to manganese exceptM753in2010, the differences were significant (p <0.05).