Abstract
ABSTRACT Plant density is one of the most important management factors affecting the peanut growth, modifying the capacity to capture radiation, water and nutrients. Peanut yield response to increased plant density changes according to environmental conditions, the genotype used, and planting date. Therefore, the optimum plant density (OPD) may vary with location. The aim of this project was (i) to fit the Mitscherlich's equation of diminishing productivities to the yield response of runner-type peanuts to increasing plant density under different growing conditions in the peanut growing region of Cordoba Argentina; and (ii) validate this model with independent experimental data. The first stage was based on the analysis of data from different projects of plant densities carried out in the peanut growing area of Córdoba. This information was adjusted to the decreasing yield equation and the OPD was calculated. For validation, a field experiment was conducted during the 2013/14 and 2014/15 growing seasons under irrigated and rain-fed conditions where pod yield was evaluated for 5, 12, 18, 25 and 36 plants/m2. No interaction was detected between soil moisture conditions and plant density. Yield response to plant density had a high degree of fitness for a wide range of environmental and crop conditions. In field experiments, the peanut yield decreased only at the lowest plant density (5 plants/m2). Yield response to density adjusted to the Mitscherlich equation indicated that OPD ranged from 10.5 to 24.8 plants/m2. Using a single adjustment equation y = 1(1 – e−0.1784x), OPD was estimated to be 16.8 plants/m2 at harvest (11.7 plants per linear meter in 0.7 m between rows) for the peanut growing region of Cordoba. This approach can be a valuable input, along with other variables to analyze, when choosing peanut sowing density.
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Claims 4
Claim · model-written summary
No interaction between soil moisture condition and plant density was detected.
Not reportedTaxon
Verbatim
e0“No interaction was detected between soil moisture conditions and plant density.”
Claim · model-written summary
Peanut yield declined only at 5 plants/m2 in field experiments.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- lowest plant density (5 plants/m2)e0
- Outcome
- peanut yielde0
- Direction
- decreasede0
- Setting
- field experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field experiments, the peanut yield decreased only at the lowest plant density (5 plants/m2).”
Claim · model-written summary
The estimated optimum plant density ranged from 10.5 to 24.8 plants/m2.
Not reportedTaxon
Verbatim
e0“OPD ranged from 10.5 to 24.8 plants/m2.”
Claim · model-written summary
A single fitted equation estimated optimum density at 16.8 plants/m2 at harvest.
Verbatim
e0“OPD was estimated to be 16.8 plants/m2 at harvest (11.7 plants per linear meter in 0.7 m between rows)”
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