Abstract
Sorghum is an off-season crop option in succession to soybean in the Cerrado region, but many producers underestimate the fertilization requirement, which can harm the productive performance of the system as a whole. Aiming to quantify the uptake and export of nutrients by grain sorghum, experiments were carried out in monocropping and intercropping with ruzigrass (Uroclhoa ruziziensis), with three levels of NPK fertilization (control without fertilization; maintenance fertilization; and maintenance + 30%). The experimental design was randomized blocks, with four replications. Sorghum plants were sampled at 33, 67 and 130 days after sowing, corresponding to the eight-leaf, flowering and physiological maturation development stages. The nutrient accumulation throughout the sorghum cycle and the respective extraction and export rates were calculated. Intercropping with ruzigrass reduces grain yield, but does not influence sorghum nutrient accumulation. Fertilization in soil with current high fertility increases biomass and nutrient accumulation, however, without any impact on grain yield. In off-season sorghum crop, nutrient uptake occurs mostly during the vegetative phase. Each ton of grain produced removes the equivalent of 14.5; 5.0; 3.5; 1.1 and 0.5 kg of N, P2O5, K2O, Mg and S, in addition to 2, 2, 25, 9 and 11 g of B, Cu, Fe, Mn and Zn, respectively. The potential for nutrient removal by grain sorghum cultivation is comparable to the patterns of the off-season maize crop, evidencing the importance of fertilization to replenish the amounts of nutrient exported.
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Claims 9
Claim · model-written summary
Intercropping with ruzigrass reduced sorghum grain yield.
- Treatment
- Intercropping with ruzigrasse0
- Interactor
- ruzigrasse0other
- Outcome
- grain yielde0
- Direction
- reducese0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intercropping with ruzigrass reduces grain yield”
t0“Sorghum”
Claim · model-written summary
Intercropping with ruzigrass did not influence sorghum nutrient accumulation.
- Treatment
- Intercropping with ruzigrasse0
- Interactor
- ruzigrasse0other
- Outcome
- sorghum nutrient accumulatione0
- Direction
- does not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intercropping with ruzigrass reduces grain yield, but does not influence sorghum nutrient accumulation”
t0“Sorghum”
Claim · model-written summary
Fertilization in high-fertility soil increased sorghum biomass.
- Treatment
- Fertilizatione0
- Outcome
- biomasse0
- Direction
- increasese0
- Setting
- soil with current high fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization in soil with current high fertility increases biomass and nutrient accumulation”
t0“Sorghum”
Claim · model-written summary
Fertilization in high-fertility soil increased sorghum nutrient accumulation.
- Treatment
- Fertilizatione0
- Outcome
- nutrient accumulatione0
- Direction
- increasese0
- Setting
- soil with current high fertilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization in soil with current high fertility increases biomass and nutrient accumulation”
t0“Sorghum”
Claim · model-written summary
Fertilization in high-fertility soil did not affect sorghum grain yield.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without any impact on grain yield”
t0“Sorghum”
Claim · model-written summary
Off-season sorghum nutrient uptake occurred mostly during the vegetative phase.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In off-season sorghum crop, nutrient uptake occurs mostly during the vegetative phase”
Claim · model-written summary
Each ton of sorghum grain removed 14.5 kg of N.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each ton of grain produced removes the equivalent of 14.5; 5.0; 3.5; 1.1 and 0.5 kg of N, P2O5, K2O, Mg and S”
t0“Sorghum”
Claim · model-written summary
Sorghum nutrient removal was comparable to off-season maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The potential for nutrient removal by grain sorghum cultivation is comparable to the patterns of the off-season maize crop”
Claim · model-written summary
The authors emphasize fertilization to replace nutrients exported by sorghum grain.
- Outcome
- fertilization to replenish the amounts of nutrient exportede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evidencing the importance of fertilization to replenish the amounts of nutrient exported”
t0“Sorghum”
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