Abstract
Cabbage presents high growth rate, which demands studies with potassium fertilization due to the high extraction and export of potassium (K). The objective of this study was to evaluate the productivity and efficiency index of K in the plant and soil in response to doses and sources of this nutrient applied to cabbage crop. Two field experiments were conducted in areas with different soil K availability. The experiment was designed as randomized blocks with four replicates. The treatments consisted of five doses of K2O (0, 100, 200, 400 and 800 kg ha-1) applied with Potassium Chloride (KCl) source, and an additional treatment with Potassium Sulphate (K2SO4) source at the dose of 200 kg ha-1 of K2O. Cabbage shows high use efficiency and recovery efficiency of K from soil under low K availability conditions. High yields may be achieved by applying low K doses. The crop accumulated high quantities of K in the shoot, but without having increases on productivity with rising K doses. Potassium export was most of the accumulated in the shoot in both growing seasons, which shows that cabbage is a high demanding crop. The differences between K2SO4 and KCl sources were minimal on productivity and efficiency index of potassium fertilization in cabbage.
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Claims 7
Claim · model-written summary
Cabbage had high K use and recovery efficiency from soil when K availability was low.
- Taxon
- Cabbage
Brassica oleracea var. capitatae0 - Outcome
- use efficiency and recovery efficiency of K from soile0
- Direction
- highe0
- Qualifier
- low K availability conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabbage shows high use efficiency and recovery efficiency of K from soil under low K availability conditions.”
Claim · model-written summary
High cabbage yields were achievable with low K doses.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- low K dosese0
- Outcome
- yieldse0
- Direction
- Highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage”
e0“High yields may be achieved by applying low K doses.”
Claim · model-written summary
Cabbage accumulated high quantities of K in the shoot.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Organ / stage
- shoote0
- Outcome
- quantities of K in the shoote0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The crop accumulated high quantities of K in the shoot”
t0“cabbage”
Claim · model-written summary
Rising K doses did not increase cabbage productivity.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- rising K dosese0
- Outcome
- productivitye0
- Direction
- without having increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage”
e0“without having increases on productivity with rising K doses”
Claim · model-written summary
Most K accumulated in the cabbage shoot was exported in both growing seasons.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Organ / stage
- shoote0
- Outcome
- Potassium exporte0
- Direction
- moste0
- Qualifier
- both growing seasonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cabbage”
e0“Potassium export was most of the accumulated in the shoot in both growing seasons”
Claim · model-written summary
Potassium sulphate and potassium chloride sources differed minimally in cabbage productivity.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- K2SO4e0
- Outcome
- productivitye0
- Direction
- minimale0
- Comparator
- KCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences between K2SO4 and KCl sources were minimal on productivity and efficiency index of potassium fertilization in cabbage.”
Claim · model-written summary
Potassium sulphate and potassium chloride sources differed minimally in potassium fertilization efficiency index.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- K2SO4e0
- Outcome
- efficiency index of potassium fertilizatione0
- Direction
- minimale0
- Comparator
- KCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences between K2SO4 and KCl sources were minimal on productivity and efficiency index of potassium fertilization in cabbage.”
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