Research on the Relationship Between Maize Lodging Resistance and Grain Mechanically Harvesting Qualities in Different Planting Density

doi:10.7668/hbnxb.2015.02.034

Abstract

Abstract: To clear the lodging resistance and mechanized harvesting index of summer maize with different dense population, the density treatments were designed to study the yield, agronomic characters, lodging resistance and mechanized harvesting index of maize.The results showed that the highest yield came from the treatment of 90 000 strains/ha, which reached to 10 124.7 kg/ha.The anti-fracture, crushing strength and puncture strength showed a downward trend with the increase of density, and the lodging capacity increased.Compared with the 75 000 strains /ha treatment, the flexural strength of the third section from base and the first section below ear in 105 000 strains/ha treatment decreased by 22.6% and 17.0%.The lodging resistance decreased.As the planting density goes up, the mechanical harvesting indexes raise too.The grain losing rate under 105 000 strains/ha grows from 3.29% to 9.79%, 66.4% higher than the grain losing rate under 75 000 strains/ha.Indexes of mechanized harvesting showed downward trend with the density increase.There was a significant negative correlation between puncture strength and grain loss rate or ear loss rate, which can use as the decision index of mechanized harvesting.The best planting density of Demeiya 1 in Huang-Huai-Hai plain is 90 000 strains/ha, because the yield is highest, the lodging resistance is lowest and the mechanical harvesting indexes are lowest too.

Key words: Maize, Yield, Planting density, Lodging resistance, Mechanical properties, Mechanized harvesting

CLC Number:

S513.01

HUANG Lu, QIAO Jiang-fang, LIU Jing-bao, XIA Lai-kun, ZHU Wei-hong, LI Chuan, ZHOU Qing-wei. Research on the Relationship Between Maize Lodging Resistance and Grain Mechanically Harvesting Qualities in Different Planting Density[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(2): 198-201. doi: 10.7668/hbnxb.2015.02.034.

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