Analysis of Factors Affecting Maize Bulk Density
The grain moisture content of threshing was significantly negatively correlated with the grain weight, and the higher the water content, the lower the bulk density. Therefore, the high moisture corn grain contained less dry matter and the quality of the product was not good. In addition, the fertility number and the grain weight of the grains were also significantly negative. Relevant, because the moisture content of the harvested grains is closely related to the level of water content at maturity and the rate of dehydration after maturation. The bulk density can be measured with a related instrument such as a corn bulkhead. In Jilin, a 1 year mature corn production area like Jilin, the later the ripening period, in the later period of fertility, with the decrease of daily temperature, the more it is not conducive to dry matter accumulation and dehydration. Therefore, in the future, breeding and application of varieties that are both high-yielding and high-quality must be based on the full use of local light and heat resources, and comprehensive consideration should be given to the selection of species types that have a moderate growth period, low moisture content, and high bulk density when harvested. District planting.
The appearance quality of grains was positively correlated with the bulk density of the grains, indicating that the varieties with high maturity and plumpness, high keratinocytes, and pure color had a high level of bulk density. Therefore, we can visually predict the merits and demerits of the seed weights and choose them; of course, it is best to choose a professional electronic load cell to determine the bulk density of corn. At the same time, the analysis results showed that the bulk density was positively correlated with the 100-grain weight and ear weight, which reached significant and extremely significant levels, indicating that the high grain weight of the grain can be selected by field observation or indoor measurement of these characters.
There are many factors affecting the accuracy of the particle weight assessment, except for the weight of the unit particle, the outside temperature, the smoothness of the particle surface, the uniformity of the grain, the moisture content of the grain, and the measuring instruments and methods. Factors related. For example, Song Xiujuan has reported that the weight of the seed grains decreased after drying and dehydrating the seeds. According to Song Xiujuan analysis, the frozen corn surface was smooth during grain harvesting. When the volume was measured, the porosity of the corn kernels in the container barrel was small, resulting in high bulk density. In the true value, after dehydration, the surface of the seed particles is rough, resulting in large porosity and low bulk density. In addition, when drying and dehydrating, the temperature rises sharply, the particles expand, the moisture reduces its weight, but the volume does not shrink, resulting in reduced bulk density. According to Guo Shuchun, when the grain water content is below 18%, the change in temperature has little effect on the measurement results of bulk density, but when it is higher than 18%, the temperature significantly affects the measurement results. Therefore, we must pay attention to the correct method when evaluating and selecting the volume tolerance of a variety.
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