Abstract
Competition between maize and signalgrass can economically cripple the intercropping by the reduced yield of maize and dry matter content of the forage. In seeking to define plant arrangements which make this system more efficient, this research was held with the objective of assessing the effects of interference of densities of signalgrass (Urochloa Brizantha) on nutrition and on maize grain yield. Two field experiments were conducted in a randomized block design with four replications. Treatments were arranged similarly in both experiments, in a 2 x 4 factorial design, the first factor being the dose of Nicosulfuron herbicide applied (0 and 8 g ha-1) and the second factor being the forage seeding rates (0, 2, 4 and 6 kg of seeds per hectare). The interference of signalgrass reduced foliar nitrogen, potassium and phosphorus content in maize plants intercropped with the forage. Higher values of grain yield were observed with the reduction of the spacing and the application of the recommended herbicide underdose (8 g ha-1). It was concluded that, regardless of the seeding density of U. Brizantha, reducing the maize seeding inter-rows spacing, combined with the application of an underdose of Nicosulfuron, caused a positive effect by reducing the initial forage growth, resulting in less interference of Urochloa brizantha on nutrient uptake by the maize plants and grain yield of the crop.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Signalgrass interference reduced foliar nitrogen content in intercropped maize.
- Treatment
- interference of signalgrasse0
- Interactor
- signalgrasse0weed
- Outcome
- foliar nitrogene0
- Direction
- reducede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interference of signalgrass reduced foliar nitrogen, potassium and phosphorus content in maize plants intercropped with the forage”
Claim · model-written summary
Signalgrass interference reduced foliar potassium content in intercropped maize.
- Treatment
- interference of signalgrasse0
- Interactor
- signalgrasse0weed
- Outcome
- potassiume0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interference of signalgrass reduced foliar nitrogen, potassium and phosphorus content in maize plants intercropped with the forage”
Claim · model-written summary
Signalgrass interference reduced foliar phosphorus content in intercropped maize.
- Treatment
- interference of signalgrasse0
- Interactor
- signalgrasse0weed
- Outcome
- phosphorus contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interference of signalgrass reduced foliar nitrogen, potassium and phosphorus content in maize plants intercropped with the forage”
Claim · model-written summary
Reduced spacing increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher values of grain yield were observed with the reduction of the spacing and the application of the recommended herbicide underdose (8 g ha-1)”
t0“maize”
Claim · model-written summary
Applying the recommended herbicide underdose increased maize grain yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher values of grain yield were observed with the reduction of the spacing and the application of the recommended herbicide underdose (8 g ha-1)”
t0“maize”
Claim · model-written summary
Reduced maize row spacing with Nicosulfuron underdose reduced initial forage growth regardless of signalgrass seeding density.
- Treatment
- reducing the maize seeding inter-rows spacing, combined with the application of an underdose of Nicosulfurone0
- Interactor
- U. Brizanthae0weed
- Outcome
- initial forage growthe0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regardless of the seeding density of U. Brizantha, reducing the maize seeding inter-rows spacing, combined with the application of an underdose of Nicosulfuron, caused a positive effect by reducing the initial forage growth”
Claim · model-written summary
Reduced row spacing with Nicosulfuron underdose lessened signalgrass interference with maize nutrient uptake.
- Treatment
- Nicosulfurone1
- Interactor
- Urochloa brizantha
Urochloa brizanthae0weed - Outcome
- nutrient uptake by the maize plantse0
- Direction
- lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in less interference of Urochloa brizantha on nutrient uptake by the maize plants and grain yield of the crop”
t0“maize”
e1“regardless of the seeding density of U. Brizantha, reducing the maize seeding inter-rows spacing, combined with the application of an underdose of Nicosulfuron, caused a positive effect by reducing the initial forage growth”
The same questions in other papers
nicosulfuron · growth · Zea mays (maize)Positive and negative results
13 papers in the same direction as this paper · 17 in the opposite direction
- negative
- negative
- negative
27 papers more in this group
See all 31 papers →density · growth · Zea mays (maize)Positive and negative results
118 papers in the same direction as this paper · 76 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
193 papers more in this group
See all 197 papers →herbicide · yield · Zea mays (maize)Positive and negative results
499 papers in the same direction as this paper · 127 in the opposite direction · 24 reporting no difference from an alternative
- negative
- negative
- no effect
647 papers more in this group
See all 651 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
- positive
- negative
- negative
654 papers more in this group
See all 658 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.