Abstract
Changes in the contents of total organic carbon and the carbon of easily mineralizable fractions of organic matter (labile humus, detritus, and mortmass) in the layers of 0–10, 10–25, and 0–25 cm were studied in leached chernozems ((Luvic Chernozems (Loamic, Aric)) subjected to deep plowing and surface tillage for nine years. In the layer of 0–25 cm, the content of Corg did not show significant difference between these two treatments and comprised 3.68–3.92% in the case of deep plowing and 3.63–4.08% in the case of surface tillage. Tillage practices greatly affected the distribution of easily mineralizable fractions of organic matter in the layers of 0–10 and 10–25 cm, though the difference between two treatments for the entire layer (0–25 cm) was insignificant. Surface tillage resulted in the increase in the contents of mortmass (by 59%), detritus (by 32%), and labile humus (by 8%) in the layer of 0–10 cm in comparison with deep plowing. At the same time, the contents of these fractions in the layer of 10–25 cm in the surface tillage treatment decreased by 67, 46, and 3%, respectively. The estimate of the nitrogen-mineralizing capacity made according to the data on the uptake of soil nitrogen by oat plants in a special greenhouse experiment confirmed the observed regularities of the redistribution of easily mineralizable organic matter fractions by the soil layers. In case of surface tillage, it increased by 23% in the layer of 0–10 cm; for the layer of 0–25 cm, no significant differences in the uptake of nitrogen by oat plants were found for the two studied treatments.
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Claims 2
Claim · model-written summary
Under surface tillage, oat nitrogen uptake increased by 23% in the 0–10 cm layer.
- Taxon
- oat plants
Avena sativae0 - Treatment
- surface tillagee1
- Outcome
- uptake of soil nitrogen by oat plantse0
- Direction
- increasede1
- Value
- 23%e1
- Setting
- greenhouse experimente0
Not reportedOrgan / stageComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“uptake of soil nitrogen by oat plants in a special greenhouse experiment”
e1“In case of surface tillage, it increased by 23% in the layer of 0–10 cm”
Claim · model-written summary
Oat nitrogen uptake in the 0–25 cm layer did not differ significantly between the two tillage treatments.
- Taxon
- oat plantsAvena sativae0
- Treatment
- surface tillagee1
- Outcome
- uptake of nitrogen by oat plantse0
- Direction
- no significant differencese0
- Qualifier
- layer of 0–25 cme0
- Comparator
- deep plowinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the layer of 0–25 cm, no significant differences in the uptake of nitrogen by oat plants were found for the two studied treatments”
e1“In case of surface tillage”
e2“subjected to deep plowing and surface tillage for nine years”
The same questions in other papers
tillage · nutrient: content · Avena sativa (oats)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.