- PII
- S3034561825070044-1
- DOI
- 10.7868/S3034561825070044
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume / Issue number 7
- Pages
- 932-942
- Abstract
- Soil CO emission was measured by the field chamber method in the experiment on application of no-till technology (without tillage) on chernozem soils of the Amur region of Russia, where 30% of the country’s soybeans are grown. One-factor and two-factor models for estimation of soil respiration per year were constructed based on the data of field measurements for 2022-2024. Soil temperature is a reasonably good predictor of emission (R = 0.8, p < 0.001), which allows us to use continuous soil temperature series from loggers to calculate seasonal fluxes at a frequency of 6 times per day. Total annual flux in the experimental plot (no-till) was 0.69 t C/ha or 23.6% lower than in the control plot (conventional tillage). The contribution of the summer period to the annual flux was 59%. The two-factor T&P-model (temperature and precipitation) showed an overestimation of annual flux by 40%. Application of air temperature from the nearest weather station for modeling gave an underestimation of total flux by 13-20%. The no-till plot showed higher water-soluble carbon (2.5 and 3.8%, p = 0.055) and nitrogen (0.3 and 0.6%, p = 0.0025) relative to the conventional plot. Switching to no-till technology increases the density of the upper soil horizons by 8-12%, but the density remains within the optimum for soybean. In the no-till plot, soil volumetric moisture is also consistently higher (by 38% on average in the 0-5 cm layer), which is a strategically important advantage due to frequent periods of moisture deficiency.
- Keywords
- no-till запас органического углерода температура почвы температура воздуха соя кукуруза
- Date of publication
- 15.07.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 71
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