Abstract
SUMMARY Much of the watermelon ( Citullus lanatus ) cultivation in Brazil is conducted in sandy soil and topographic conditions that favour the erosion process. Therefore, conservation tillage methods are critical for the sustainability of the production chain of this vegetable crop. We studied different tillage methods and cover crops in watermelon cultivation in the area of the reform of degraded pasture. For this purpose, two tillage methods were established as experimental treatments: minimum tillage preparation with subsoiling only, and no tillage. As cover crops white lupine ( Lupinus albus ) and bristle oat ( Avena strigosa ) were seeded. As control, watermelon was cultivated with conventional tillage, without prior cultivation of cover crops. For the experimental design, randomised blocks in a factorial arrangement with four replications were used. After liming and phosphate fertilisation of the soil, cover crops were cultivated in soil with minimum tillage and no tillage to produce straw to be used for soil cover, where subsequently the watermelon was grown. The productivity of dry mass and nutrient accumulation in the shoot of cover crops, the soil properties and the watermelon agronomic performance were evaluated. White lupine had better performance in the production of dry mass and nutrient accumulation in shoot than bristle oat. There were differences among treatments for soil penetration resistance, where in conventional tillage the values were lower in the first 30 cm of depth in relation to no-tillage cultivation. The tillage method also affected the fertility of the soil at a depth of 0 to 20 cm. The no tillage provided increased nitrogen leaf content in watermelon regardless of cover crops but restricted root growth in relation to minimum tillage and conventional tillage. Watermelon had similar commercial production by different treatments, with reduction only in no tillage on bristle oat straw.
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Claims 7
Claim · model-written summary
White lupine produced more shoot dry mass and accumulated more nutrients than bristle oat.
- Taxon
- White lupine
Lupinus albuse0 - Outcome
- production of dry mass and nutrient accumulation in shoote0
- Direction
- better performancee0
- Comparator
- bristle oate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“White lupine had better performance in the production of dry mass and nutrient accumulation in shoot than bristle oat.”
Claim · model-written summary
Conventional tillage had lower soil penetration resistance than no tillage in the first 30 cm.
- Treatment
- conventional tillagee0
- Outcome
- soil penetration resistancee0
- Direction
- lowere0
- Qualifier
- first 30 cm of depthe0
- Comparator
- no-tillage cultivatione0
Not reportedTaxon
Verbatim
e0“There were differences among treatments for soil penetration resistance, where in conventional tillage the values were lower in the first 30 cm of depth in relation to no-tillage cultivation.”
Claim · model-written summary
Tillage method affected soil fertility at 0 to 20 cm depth.
Not reportedTaxonDirection
Verbatim
e0“The tillage method also affected the fertility of the soil at a depth of 0 to 20 cm.”
Claim · model-written summary
No tillage increased watermelon leaf nitrogen content regardless of cover crop.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- no tillagee0
- Outcome
- nitrogen leaf contente0
- Direction
- increasede0
- Qualifier
- regardless of cover cropse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no tillage provided increased nitrogen leaf content in watermelon regardless of cover crops but restricted root growth in relation to minimum tillage and conventional tillage.”
Claim · model-written summary
No tillage restricted watermelon root growth relative to minimum and conventional tillage.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- no tillagee0
- Outcome
- root growthe0
- Direction
- restrictede0
- Comparator
- minimum tillage and conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no tillage provided increased nitrogen leaf content in watermelon regardless of cover crops but restricted root growth in relation to minimum tillage and conventional tillage.”
Claim · model-written summary
Watermelon commercial production was similar across the treatments except for a reduction with no tillage on bristle oat straw.
- Taxon
- WatermelonCitrullus lanatuse0
- Treatment
- different treatmentse0
- Outcome
- commercial productione0
- Direction
- similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Watermelon had similar commercial production by different treatments, with reduction only in no tillage on bristle oat straw.”
Claim · model-written summary
No tillage on bristle oat straw reduced watermelon commercial production.
- Taxon
- WatermelonCitrullus lanatuse0
- Treatment
- no tillage on bristle oat strawe0
- Outcome
- commercial productione0
- Direction
- reductione0
- Comparator
- different treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Watermelon had similar commercial production by different treatments, with reduction only in no tillage on bristle oat straw.”
The same questions in other papers
tillage · growth · Citrullus lanatus (watermelon)Positive and negative results
1 in the opposite direction
- positive
tillage · yield · Citrullus lanatus (watermelon)Positive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 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.