Establishment of Planting and Harvesting Dates of Summer Maize Suitable for Mechanical Harvesting in Huaibei Plain
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Abstract:
Field experiments were carried out to investigate the relationship between grain moisture content and effective accumulated temperature of different hybrids in the main production areas of the Huaibei Plain. Combining with meteorological data to determine the suitable planting and harvesting dates which suitable for the machining. The results showed that the earlier planting date, the higher the yield, and the yield of the LY9105 was significantly higher than that of the DK517, but the grain dehydration rate of the DK517 was faster than that of the LY9105. The effective accumulated temperatures required to 28% moisture content of the DK517 and LY9105 are 873.0℃ and 943.9℃, respectively, and the targeted 25% moisture content are 914.1℃ and 992.3℃, respectively. In order to ensure the mechanical grain harvest and high yield, when the middle maturing hybrid comparable to LY9105 are planted at June 5th, and the harvest date is about October 5th, 100% of the year can guarantee the machine grain harvesting. When the planting date postponed to June 15th, the early-maturing hybrids comparable to DK517 are planted, and the harvesting date around October 5th, 72.7%-90.9% of the year can guarantee the grain machine harvest. Therefore, in the Hubei plain, the reasonable combination of hybrids and planting date can achieve mechanical harvesting, high and stable grain yield.