Mechanical Compaction of Black Soil: Impact on Soil Structure and Sugar Beet Yield

doi:10.11924/j.issn.1000-6850.casb18070129

Abstract

Abstract: Mechanical compaction of black soil is the destruction of soil structure caused by mechanized operations, which results in the decline of soil quality. We analyzed the indexes of soil void ratio, soil porosity degree ratio, soil air permeability, soil infiltration rate and so on through the comparative compaction test of agricultural machinery. The results indicated that: the change characteristics of soil compaction accumulation area showed that the soil void ratio and soil porosity degree ratio decreased, soil air permeability got worse, the soil infiltration rate of rainfall reduced with the increase of the number of mechanical compaction, the topsoil of 5-10 cm was the most influenced area and the inflection point was at 10 cm of plough layer, little effect was found on deep soil; soil compaction had a negative effect on the growth of sugar beet, compared with CK, the diameter and the length of beet root reduced by 6.67%-16.08%, 1.96%-17.65%, respectively, the root yield, the sugar content and the sugar yield decreased by 5.81%- 24.13% , 0.49- 0.81oZ, 4.73%- 27.03% , respectively. The yield and quality of sugar beet declined more significantly with more rolling times.

CLC Number:

S233.1

References

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