Abstract
Liming and N fertilization are common practices for optimizing crop yields in tropical agriculture, but the adequate N rate to ensure crop development, enhance yields and N use efficiency, and improve soil chemical properties has not been established for grass rotation. We assessed the optimal N fertilizer rate for combination with liming in an agricultural system composed of two grasses (maize and rice) in rotation under no-till (NT) conditions. Four N rates (0, 50, 100, and 150 kg N·ha−1) were tested under two liming conditions. Maize (11 Mg·ha−1) and rice (5 Mg·ha−1) yields were highest with lime and 150 kg N·ha−1 applications. At 18 months after liming, lime application increased soil pH. In addition, combining liming with N fertilization further increased SOM content at all N rates. Lime increased available P, exchangeable Ca2+ and Mg2+, and BS at N rates of 0, 50, and 100 kg N·ha−1. Overall, combining liming and N fertilization is beneficial for grass crops under NT conditions, as evidenced by enhanced maize and rice N use efficiency and yields. N fertilization rates of 100 and 150 kg N·ha−1 under lime amendment provided the best improvements in crop yields in this cropping system.
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Claims 8
Claim · model-written summary
Maize yield was highest at 11 Mg·ha−1 with lime and 150 kg N·ha−1.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize (11 Mg·ha−1) and rice (5 Mg·ha−1) yields were highest with lime and 150 kg N·ha−1 applications”
Claim · model-written summary
Rice yield was highest at 5 Mg·ha−1 with lime and 150 kg N·ha−1.
- Taxon
- rice
Oryza sativae0 - Treatment
- lime and 150 kg N·ha−1 applicationse0
- Outcome
- yieldse0
- Direction
- higheste0
- Value
- 5 Mg·ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize (11 Mg·ha−1) and rice (5 Mg·ha−1) yields were highest with lime and 150 kg N·ha−1 applications”
Claim · model-written summary
Liming increased soil pH after 18 months.
- Taxon
- Maize-Upland Ricet0
- Treatment
- lime applicatione0
- Outcome
- soil pHe0
- Direction
- increasede0
- Qualifier
- 18 months after liminge0
Not reportedComparator
Verbatim
e0“At 18 months after liming, lime application increased soil pH”
t0“Maize-Upland Rice”
Claim · model-written summary
Liming combined with nitrogen fertilization increased soil organic matter at all nitrogen rates.
- Taxon
- Maize-Upland Ricet0
- Treatment
- combining liming with N fertilizatione0
- Outcome
- SOM contente0
- Direction
- increasede0
- Qualifier
- at all N ratese0
Not reportedComparator
Verbatim
e0“combining liming with N fertilization further increased SOM content at all N rates”
t0“Maize-Upland Rice”
Claim · model-written summary
Lime increased available phosphorus, exchangeable calcium and magnesium, and base saturation at nitrogen rates of 0, 50, and 100 kg N·ha−1.
- Taxon
- Maize-Upland Ricet0
- Treatment
- Limee0
- Outcome
- available P, exchangeable Ca2+ and Mg2+, and BSe0
- Direction
- increasede0
- Qualifier
- at N rates of 0, 50, and 100 kg N·ha−1e0
Not reportedComparator
Verbatim
e0“Lime increased available P, exchangeable Ca2+ and Mg2+, and BS at N rates of 0, 50, and 100 kg N·ha−1”
t0“Maize-Upland Rice”
Claim · model-written summary
Combining liming and nitrogen fertilization enhanced maize nitrogen use efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“combining liming and N fertilization is beneficial for grass crops under NT conditions, as evidenced by enhanced maize and rice N use efficiency and yields”
Claim · model-written summary
Combining liming and nitrogen fertilization enhanced rice nitrogen use efficiency.
- Taxon
- riceOryza sativae0
- Treatment
- combining liming and N fertilizatione0
- Outcome
- N use efficiencye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“combining liming and N fertilization is beneficial for grass crops under NT conditions, as evidenced by enhanced maize and rice N use efficiency and yields”
Claim · model-written summary
Under lime amendment, 100 and 150 kg N·ha−1 gave the best crop yield improvements.
Verbatim
e0“N fertilization rates of 100 and 150 kg N·ha−1 under lime amendment provided the best improvements in crop yields in this cropping system”
t0“Maize-Upland Rice”
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