Abstract
The objective of the present study was to evaluate the effects of row spacing and planting density, under different water regimes, on dry grain production of the maize hybrid AG -1051, in Teresina, Piauí. Two experiments were conducted with the use of a conventional sprinkler system for irrigation, being one with 100% and the other with 50% crop evapotranspiration (ETc) replacement. A randomized block experimental design was used, in a 5x2 factorial scheme, combining five planting densities (PD) (20,000; 40,000; 60,000; 80,000; and 100,000 plants ha-1) and two spacings between rows (RS) (0.5 and 1.0 m), with four replications. The weight of 100 grains, cob percentage, grain yield, and water use efficiency were evaluated. The increment of planting density caused a linear decrease in the 100-grain weight and increment of the cob percentage in relation to the total ear weight. Under full irrigation regime, the combination of the 0.5 m row spacing and planting density of 72,000 plants ha-1 provided maximum yield of 7.2 Mg ha-1. Under water deficit condition, the maximum yield of 4.8 Mg ha-1 was reached in the combination of the 0.5 m row spacing and planting density of 67,000 plants ha-1..The total water depth of 419 mm provided maximum WUE of 1.70 kg m-3. The total water depth of 268 mm caused a reduction in WUE with maximum point of 1.54 kg m-3.
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Claims 6
Claim · model-written summary
Increasing planting density caused a linear decrease in the 100-grain weight of maize.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e1“The increment of planting density caused a linear decrease in the 100-grain weight and increment of the cob percentage in relation to the total ear weight”
Claim · model-written summary
Increasing planting density increased the cob percentage in relation to total ear weight of maize.
- Treatment
- planting densitye1
- Outcome
- cob percentagee1
- Direction
- incremente1
- Qualifier
- in relation to the total ear weighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e1“The increment of planting density caused a linear decrease in the 100-grain weight and increment of the cob percentage in relation to the total ear weight”
Claim · model-written summary
Under full irrigation, the combination of 0.5 m row spacing and 72,000 plants per hectare gave a maximum maize grain yield of 7.2 Mg per hectare.
- Treatment
- the combination of the 0.5 m row spacing and planting density of 72,000 plants ha-1e2
- Outcome
- yielde2
- Direction
- maximume2
- Value
- 7.2 Mg ha-1e2
- Setting
- Under full irrigation regimee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e2“Under full irrigation regime, the combination of the 0.5 m row spacing and planting density of 72,000 plants ha-1 provided maximum yield of 7.2 Mg ha-1”
Claim · model-written summary
Under water deficit, the combination of 0.5 m row spacing and 67,000 plants per hectare gave a maximum maize yield of 4.8 Mg per hectare.
- Treatment
- the combination of the 0.5 m row spacing and planting density of 67,000 plants ha-1e3
- Outcome
- yielde3
- Direction
- maximume3
- Value
- 4.8 Mg ha-1e3
- Setting
- water deficit conditione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e3“Under water deficit condition, the maximum yield of 4.8 Mg ha-1 was reached in the combination of the 0.5 m row spacing and planting density of 67,000 plants ha-1”
Claim · model-written summary
A total water depth of 419 mm gave the maximum water use efficiency of maize, 1.70 kg per cubic metre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e4“The total water depth of 419 mm provided maximum WUE of 1.70 kg m-3”
Claim · model-written summary
A total water depth of 268 mm reduced maize water use efficiency, with a maximum of 1.54 kg per cubic metre.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PRODUCTIVE PERFORMANCE OF MAIZE CROP”
e5“The total water depth of 268 mm caused a reduction in WUE with maximum point of 1.54 kg m-3”
The same questions in other papers
density · yield · Zea mays (maize)Positive and negative results
518 papers in the same direction as this paper · 132 in the opposite direction · 7 reporting no difference from an alternative
- negative
- negative
- no effect
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