Opportunities to improve phosphorus efficiency and soil fertility in rainfed lowland and upland rice ecosystems

Kirk, G. J. D.; George, Thomas; Courtois, B.; Senadhira, D.

doi:10.1016/s0378-4290(97)00141-x

Cited by 108 publications

(63 citation statements)

References 64 publications

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“…Though this deficiency could be corrected through fertilizer application, many farmers in low-input farming ecosystems are too resource poor or simply do not have access to P fertilizers (Kirk et al 1998). Furthermore, suitable high-grade rock phosphates represent a finite resource near depletion (RungeMetzger 1995).…”

Section: Introductionmentioning

confidence: 99%

Stress Response Versus Stress Tolerance: A Transcriptome Analysis of Two Rice Lines Contrasting in Tolerance to Phosphorus Deficiency

Pariasca‐Tanaka

Satoh

Rose

et al. 2009

Rice

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Transcriptional profiling has identified genes associated with adaptive responses to phosphorus (P) deficiency; however, distinguishing stress response from tolerance has been difficult. We report gene expression patterns in two rice genotypes (Nipponbare and NIL6-4 which carries a major QTL for P deficiency tolerance (Pup1)) grown in soil with/without P fertilizer. We tested the hypotheses that tolerance of NIL6-4 is associated with (1) internal P remobilization/redistribution; (2) enhanced P solubilization and/or acquisition; and (3) root growth modifications that maximize P interception. Genes responding to P supply far exceeded those differing between genotypes. Genes associated with internal P remobilization/ redistribution and soil P solubilization/uptake were stress responsive but often more so in intolerant Nipponbare. However, genes putatively associated with root cell wall loosening and root hair extension (xyloglucan endotransglycosylases/hydrolases and NAD(P)H-dependent oxidoreductase) showed higher expression in roots of tolerant NIL6-4. This was supported by phenotypic data showing higher root biomass and hair length in NIL6-4.

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Section: Introductionmentioning

confidence: 99%

Stress Response Versus Stress Tolerance: A Transcriptome Analysis of Two Rice Lines Contrasting in Tolerance to Phosphorus Deficiency

Pariasca‐Tanaka

Satoh

Rose

et al. 2009

Rice

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“…Phosphorus deficiency constrains rice production in tropical regions with strongly-weathered soils such as Oxisols and Ultisols (Kirk et al, 1998). Such soils are typically acidic and rich in iron and aluminum sesquioxides, which confers a considerable capacity to retain phosphate (Tiessen and Shang, 1998).…”

Section: Introductionmentioning

confidence: 99%

Organic phosphorus in Madagascan rice soils

Turner

2006

Geoderma

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“…in terms of its reduction-oxidation potential, water dynamics, and organic matter accumulation. Therefore, P dissolution proceeds with a particular process in lowland rice fields 31 . Submergence causes flushes of easily extractable soil P in a few days, which is a result of the chemical reduction of ferric phosphate and hydrated ferric oxide surfaces 30 .…”

Section: Pr Dissolution Under Soil Physicochemical Conditions In the mentioning

confidence: 99%

“…Submergence causes flushes of easily extractable soil P in a few days, which is a result of the chemical reduction of ferric phosphate and hydrated ferric oxide surfaces 30 . However, this extractable P would be absorbed by the amorphous solid phase 31 . These P sorption and/or desorption reactions in submerged soil strongly interact with the formation changes in iron minerals 6,29 resulting from changes in the soil reduction-oxidation potential.…”

Section: Pr Dissolution Under Soil Physicochemical Conditions In the mentioning

confidence: 99%

Potential Utilization of Local Phosphate Rocks to Enhance Rice Production in Sub-Saharan Africa

Nakamura

Fukuda

Nagumo

et al. 2013

JARQ

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It is known that phosphate rock (PR) deposits that account for most world's PR production are found in African countries. However, the rate of phosphorus (P) fertilizer use in Africa is typically low, despite the high requirement for application of the same there. This applies particularly to sub-Saharan Africa (SSA), where P deficiency has been suggested as one of the key constraints to crop production, despite the many PR deposits. There have been many excellent reviews on PR utilization in SSA, but hardly any have focused on its effectiveness in lowland rice cultivation. Given this lack of information, we reviewed the potential of PRs produced in the SSA region, focusing particularly on the utilization of PRs for rice cultivation in this region. Our review indicates that PR direct application in lowland rice resulted in high performance, regardless of the PR reactivity and the location investigated. A Phosphate Rock Decision Support System can help disseminate information on PR utilization in SSA; however, there is room for further improvement in predicting agronomic efficiencies in lowland rice cultivation, with consideration of the unique changes in soil condition such as the reduced condition that occurs in submerged paddy soils. In conclusion, the local PRs produced in SSA can be effectively utilized for direct application on lowland rice cultivation, hence the need to elucidate the PRs solubilization mechanism and therefore clarify the condition that maximizes the effect of local PRs direct application in SSA.

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Opportunities to improve phosphorus efficiency and soil fertility in rainfed lowland and upland rice ecosystems

Cited by 108 publications

References 64 publications

Stress Response Versus Stress Tolerance: A Transcriptome Analysis of Two Rice Lines Contrasting in Tolerance to Phosphorus Deficiency

Stress Response Versus Stress Tolerance: A Transcriptome Analysis of Two Rice Lines Contrasting in Tolerance to Phosphorus Deficiency

Organic phosphorus in Madagascan rice soils

Potential Utilization of Local Phosphate Rocks to Enhance Rice Production in Sub-Saharan Africa

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