Abstract
IImprovements in soybean (Glycine max [L.] Merrill) and wheat (Triticum aestivum L.) yields in cropping systems under no-till management (NTM) in the subtropics have been obtained through advances in phosphorus (P) utilization, cultivar selection, and planting and harvesting strategies. This fact, along with the P application in band application in consolidated planting, has resulted in lower P utilization efficiency and depleted soil P levels. The aim of this study was to evaluate the efficiency of P2O5 rates and application methods in soybean-wheat cropping under NTM during two growing seasons (2014–2016) in a Typic Eutrorthox. Four P2O5 rates (0, 30, 60, and 120 kg ha-1) of triple superphosphate (45% P2O5) were applied using two application methods (broadcast and band application at sowing) before the soybean and wheat crops were cultivated. Both P application methods resulted in a significant yield response to P2O5 rates for the soybean and wheat crops. Under NTM, broadcast P2O5 application was more effective than band application in soybean, and maximum grain yields were obtained with 129.3 and 88.1 kg P2O5 ha-1, respectively. Maximum wheat grain yields were obtained with 91.8 and 99.7 kg P2O5 ha-1 for broadcast and band application, respectively. Except for total P in leaves, nutrient uptake and yield components were not affected by the P application methods and rates. The results suggested that in soils with adequate available P levels of >15 mg kg-1 (Mehlich 1 extractant), the grain yield is equivalent or superior with broadcast P application as compared to band application for both soybean and wheat crops when cultivated in a Typical Eutrorthox under subtropical conditions. However, broadcast application is considered more effective for large areas of grain cultivation, where it is necessary to sow crops uniformly within the shortest possible time.
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Claims 7
Claim · model-written summary
Soybean yield responded significantly to P2O5 rate under both application methods.
- Taxon
- soybean
Glycine maxe0 - Treatment
- P2O5 ratese0
- Outcome
- yield responsee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both P application methods resulted in a significant yield response to P2O5 rates for the soybean and wheat crops”
Claim · model-written summary
Wheat yield responded significantly to P2O5 rate under both application methods.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- P2O5 ratese0
- Outcome
- yield responsee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both P application methods resulted in a significant yield response to P2O5 rates for the soybean and wheat crops”
Claim · model-written summary
Broadcast P2O5 application was more effective than band application in soybean under NTM.
- Taxon
- soybeanGlycine maxe0
- Treatment
- broadcast P2O5 applicatione0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- band applicatione0
- Setting
- NTMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NTM, broadcast P2O5 application was more effective than band application in soybean”
Claim · model-written summary
Maximum wheat grain yield under broadcast application occurred at 91.8 kg P2O5 ha-1.
- Taxon
- wheatTriticum aestivume0
- Treatment
- broadcaste0
- Outcome
- Maximum wheat grain yieldse0
- Direction
- Maximume0
- Value
- 91.8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum wheat grain yields were obtained with 91.8 and 99.7 kg P2O5 ha-1 for broadcast and band application, respectively”
Claim · model-written summary
Maximum wheat grain yield under band application occurred at 99.7 kg P2O5 ha-1.
- Taxon
- wheatTriticum aestivume0
- Treatment
- band applicatione0
- Outcome
- Maximum wheat grain yieldse0
- Direction
- Maximume0
- Value
- 99.7 kg P2O5 ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum wheat grain yields were obtained with 91.8 and 99.7 kg P2O5 ha-1 for broadcast and band application, respectively”
Claim · model-written summary
For soybean in adequately P-supplied soils, broadcast P gave equivalent or superior grain yield to band application.
- Taxon
- soybeanGlycine maxe0
- Treatment
- broadcast P applicatione0
- Outcome
- grain yield is equivalent or superiore0
- Qualifier
- adequate available P levels of >15 mg kg-1e0
- Comparator
- band applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in soils with adequate available P levels of >15 mg kg-1 (Mehlich 1 extractant), the grain yield is equivalent or superior with broadcast P application as compared to band application for both soybean and wheat crops”
Claim · model-written summary
For wheat in adequately P-supplied soils, broadcast P gave equivalent or superior grain yield to band application.
- Taxon
- wheatTriticum aestivume0
- Treatment
- broadcast P applicatione0
- Outcome
- grain yield is equivalent or superiore0
- Qualifier
- adequate available P levels of >15 mg kg-1e0
- Comparator
- band applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in soils with adequate available P levels of >15 mg kg-1 (Mehlich 1 extractant), the grain yield is equivalent or superior with broadcast P application as compared to band application for both soybean and wheat crops”
The same questions in other papers
phosphorus · yield · Glycine max (soybean)Positive and negative results
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- no effect
- positive
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See all 355 papers →phosphorus · yield · Triticum aestivum (wheat)Positive and negative results
523 papers in the same direction as this paper · 43 in the opposite direction · 5 reporting no difference from an alternative
- positive
- negative
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See all 572 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.