Abstract
Soil compaction, induced by no-tillage practices, can negatively impact soil properties important for plant growth. Compacted soils can restrict root growth depth, resulting in reduced crop yield. Although safflower (Carthamus tinctorius) has a deep root system, yield may still be affected by soil compaction. Therefore, this study aimed to evaluate safflower root and shoot growth when submitted to soil compaction in an Oxisol soil under controlled (greenhouse) and field conditions. Five soil bulk density measures were performed in a greenhouse (1.1, 1.2, 1.3, 1.4 and 1.5 Mg m–3). Four compaction levels (established by the number of passes of a farm tractor: 0, 1, 3, and 5 passes consecutively) were performed to evaluate the effect of soil compaction in the field. Root and shoot growth were measured after harvesting the plants. Safflower root growth was reduced when soil compaction increased from 1.1 to 1.5 Mg m–3 under controlled (greenhouse) conditions. In field conditions, we observed a decrease in root length, and fresh and dry matter in roots and shoots of safflower as the soil compaction increased to 5P (1.28 Mg m–3). The results of our study suggest safflower root and shoot growth can be impacted by soil compaction which could affect crop yield.
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Claims 3
Claim · model-written summary
Safflower root growth was reduced as soil compaction increased from 1.1 to 1.5 Mg m-3 under greenhouse conditions.
- Taxon
- Safflower
Carthamus tinctoriuse0 - Treatment
- soil compaction increased from 1.1 to 1.5 Mg m–3e0
- Outcome
- root growthe0
- Direction
- reducede0
- Setting
- controlled (greenhouse) conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Safflower root growth was reduced when soil compaction increased from 1.1 to 1.5 Mg m–3 under controlled (greenhouse) conditions”
Claim · model-written summary
In the field, safflower root length decreased as soil compaction increased to 5 tractor passes (1.28 Mg m-3).
- Taxon
- safflowerCarthamus tinctoriuse0
- Treatment
- soil compaction increased to 5P (1.28 Mg m–3)e0
- Outcome
- root lengthe0
- Direction
- decreasee0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field conditions, we observed a decrease in root length, and fresh and dry matter in roots and shoots of safflower as the soil compaction increased to 5P (1.28 Mg m–3)”
Claim · model-written summary
In the field, fresh and dry matter of safflower roots and shoots decreased as soil compaction increased to 5 tractor passes (1.28 Mg m-3).
- Taxon
- safflowerCarthamus tinctoriuse0
- Treatment
- soil compaction increased to 5P (1.28 Mg m–3)e0
- Outcome
- fresh and dry matter in roots and shootse0
- Direction
- decreasee0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field conditions, we observed a decrease in root length, and fresh and dry matter in roots and shoots of safflower as the soil compaction increased to 5P (1.28 Mg m–3)”
The same questions in other papers
tillage · growth · Carthamus tinctorius (safflower)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 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.