CCM: Grain position effect of corn grain moisture content and grain filling 04-18-2016

There is a relationship between corn grain moisture content and grain filling, and the grain position effect shows many different performances in different periods of the varieties.

 

The researchers identified the relationship between corn grain moisture content and grain filling by analyzing the grain moisture content, dehydration rate, grain weight, volume, grouting and filling parameters dynamic of different parts of the grain after flowering with different types of natural dehydration corn cultivars as materials.

 

The results show that the grain moisture contents of two key time nodes in late filling for two varieties are very different. The grain moisture content of Xianyu335 is lower than Liyu16 at the two time nodes (4.27% and 5.49%, respectively). The grain moisture rate, size and weight have obvious grain position effect. As for the grain moisture rate in the two varieties: basal gain has the highest, followed by middle grain, and the upper portion of grain has the lowest. And performances of the grain position effect of grain size and grain weight are the same as that of grain moisture rate.

 



But there are genotype differences of grain position effect of grain filling rate. The performance of Liyu16 shows that middle grain has the highest, followed by basal grain, and upper portion grain has the lowest, while Xianyu335 shows that basal grain has the highest, followed by middle grain, and upper portion grain has the lowest.

 

In the start filling period, upper grain is greater than basal and middle grain. But in active grain filling period, the grain positions are quite different and have opposite trend with the grain position effect among cultivars.

 

The performance of Xianyu335: the upper part grain is slightly larger than the basal portion, while the basal part of Liyu16 is longer than the middle and upper grain. The filling peaks (the maximum filling rate) of the two varieties appear in a time difference of 4.77d (with the same trend among grain position).



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Tag: corn


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