The experiment of determining the soil bulk density of the ring knife set is based on the study of some common physical properties of the soil, different farming methods, and the influence on the growth of the plant. Different types of tillage methods are designed to explore the changes of soil in the production of buckwheat The protection relationship between growth and the natural environment provides a certain reference. In addition, the measurement of the soil bulk density by the ring knife set is also influenced by the type and mode of mechanical application.
In the same growth period, the soil bulk density of no-tillage was significantly higher than that of tillage from the sowing date to the jointing stage, and there was no significant difference between pine tillage and tillage. The ring cutter method was adopted at the sowing stage, seedling stage, tillering stage and jointing stage separately. The soil bulk density of four soil layers was measured at the heading and maturing stages. The average of four layers was the soil bulk density of the plow layer (0 to 20 cm), which was repeated three times per plot and dried at 105°C to a constant mass to calculate the soil bulk density.
The soil tool weight at the heading stage and the harvest stage of the three kinds of tillage methods was between 1.40 and 1.50 g/cm3, and the difference was not significant. At different growth stages, the soil bulk density of no-tillage changed little during each growth period, ranging from 1.45 to 1.50g/cm3. The soil bulk density of pine tillage and ploughing increased from the sowing date to the heading date, among which the ring cutter set The sowing dates were 1.31 and 1.30 g/cm3, respectively, and the heading dates were 1.44 and 1.46 g/cm3, respectively.
In the same growing season, the same agricultural method of buckwheat in the same year showed similar trends in soil bulk density and soil hardness. The ring knife set showed a positive correlation between soil bulk density and soil hardness. In the same period, soil bulk density and hardness showed the same growth and linear regression. The effects of different tillage methods on the determination of soil bulk density by ring knife sets mainly affected the sowing time of buckwheat.
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