Abstract
ABSTRACT The decomposition and release of nutrients from plant residues that precede the cultivation of vegetables can positively affect the morphological parameters and crop productivity. The objective of this study was to evaluate the effects of plant residue decomposition and the cycling of macro and micronutrients of four cover crops preceding the broccoli production (single head Avenger hybrid). A 4x3 factorial scheme was implemented including four cover crops: signal grass (SG), pearl millet (PM), sunn hemp (SH), mixture PM+SH; and three doses of mineral fertilizer: 0, 50 (200 kg ha-1 of P2O5, 50 kg ha-1 of K2O, 75 kg ha-1 of N) and 100% of the recommended fertilizer dose (400 kg ha-1 of P2O5, 100 kg ha-1 of K2O and 150 kg ha-1 of N). Fresh (FB) and dry biomass (DB), residue decomposition, nutrient cycling of cover crops, the number of leaves, head height (HH), stem diameter (SD), head diameter (HD), head fresh-biomass (FB), head dry biomass (DB) and broccoli yield were evaluated. The FB production from PM (25.9 t ha-1), SG (23.3 t ha-1) and mixture PM+SH (23.9 t ha-1) were similar, while the largest production of DB occurred in the SG (11.9 t ha-1). The lowest rate of decomposition and the greatest half-life time of residues occurred where PM was present. The accumulation and nutrient cycling follow the sequence K>N>Ca>Mg>P>S and Mn>Zn>B>Cu for all cover crop treatments evaluated. The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively.
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Claims 9
Claim · model-written summary
Fresh biomass of pearl millet residue (25.9 t ha-1) was similar to that of signal grass and the PM+SH mixture.
- Taxon
- pearl millet
Cenchrus americanuse0 - Outcome
- FB productione1
- Direction
- similare1
- Value
- 25.9 t ha-1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“signal grass (SG), pearl millet (PM), sunn hemp (SH)”
e1“The FB production from PM (25.9 t ha-1), SG (23.3 t ha-1) and mixture PM+SH (23.9 t ha-1) were similar”
Claim · model-written summary
Signal grass had the largest dry biomass production of the cover crops, 11.9 t ha-1.
Verbatim
e0“signal grass (SG), pearl millet (PM), sunn hemp (SH)”
e2“the largest production of DB occurred in the SG (11.9 t ha-1)”
Claim · model-written summary
The lowest rate of residue decomposition and the greatest half-life occurred where pearl millet was present.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- rate of decompositione3
- Direction
- loweste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“signal grass (SG), pearl millet (PM), sunn hemp (SH)”
e3“The lowest rate of decomposition and the greatest half-life time of residues occurred where PM was present”
Claim · model-written summary
Accumulation and nutrient cycling of the cover crops follow the sequence K>N>Ca>Mg>P>S and Mn>Zn>B>Cu.
Verbatim
e4“The accumulation and nutrient cycling follow the sequence K>N>Ca>Mg>P>S and Mn>Zn>B>Cu for all cover crop treatments evaluated”
Claim · model-written summary
Stem diameter of broccoli was highest with the 100% fertilizer dose and residues of SH or PM+SH mixture.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Treatment
- 100% dose of mineral fertilizere5
- Outcome
- SDe5
- Direction
- higheste5
- Value
- 51.95; 51.44 and 50.67 mme5
- Qualifier
- residues of SH or PM+SH mixturee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“fertilizer doses in broccoli cultivation”
e5“The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively”
Claim · model-written summary
Head diameter of broccoli was highest with the 100% fertilizer dose and residues of SH or PM+SH mixture.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- 100% dose of mineral fertilizere5
- Outcome
- HDe5
- Direction
- higheste5
- Value
- 187.97; 187.41 and 183.48 mme5
- Qualifier
- residues of SH or PM+SH mixturee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“fertilizer doses in broccoli cultivation”
e5“The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively”
Claim · model-written summary
Head fresh biomass of broccoli was highest with the 100% fertilizer dose and residues of SH or PM+SH mixture.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- 100% dose of mineral fertilizere5
- Outcome
- FBe5
- Direction
- higheste5
- Value
- 1.01; 1.00 and 0.97 kge5
- Qualifier
- residues of SH or PM+SH mixturee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“fertilizer doses in broccoli cultivation”
e5“The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively”
Claim · model-written summary
Head dry biomass of broccoli was highest with the 100% fertilizer dose and residues of SH or PM+SH mixture.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- 100% dose of mineral fertilizere5
- Outcome
- DBe5
- Direction
- higheste5
- Value
- 0.08; 0.07 and 0.07 kge5
- Qualifier
- residues of SH or PM+SH mixturee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“fertilizer doses in broccoli cultivation”
e5“The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively”
Claim · model-written summary
Broccoli yield was highest with the 100% fertilizer dose and residues of SH or PM+SH mixture.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- 100% dose of mineral fertilizere5
- Outcome
- broccoli yielde5
- Direction
- higheste5
- Value
- 25.3; 24.9 and 24.7 t ha-1e5
- Qualifier
- residues of SH or PM+SH mixturee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“fertilizer doses in broccoli cultivation”
e5“The highest SD (51.95; 51.44 and 50.67 mm), HD (187.97; 187.41 and 183.48 mm), FB (1.01; 1.00 and 0.97 kg), DB (0.08; 0.07 and 0.07 kg) and broccoli yield (25.3; 24.9 and 24.7 t ha-1) was observed in the 100% dose of mineral fertilizer and on the residues of SH or PM+SH mixture, respectively”
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See all 496 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.