Zinc in wheat grain as affected by nitrogen fertilization and available soil zinc

Moraghan, T.; Sims, Albert L.; Smith, L. J.

doi:10.1080/01904169909365666

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…Methods are needed to offset the reduction in bioavailability of grain Zn resulting from these practices if it is found to be general. The most obvious option is addition of Zn fertiliser, which increases grain Zn concentrations and also increases yield if Zn is limiting 52–54. Other possible means to increase bioavailability of Zn in grain are classical plant breeding or genetic manipulation of crops both to increase Zn concentrations and to decrease PA concentrations 20, 21, 55, 56.…”

Section: Discussionmentioning

confidence: 99%

Zinc bioavailability in wheat grain in relation to phosphorus fertiliser, crop sequence and mycorrhizal fungi

Ryan

McInerney²,

Record³

et al. 2008

J Sci Food Agric

118

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Section: Discussionmentioning

confidence: 99%

Zinc bioavailability in wheat grain in relation to phosphorus fertiliser, crop sequence and mycorrhizal fungi

Ryan

McInerney²,

Record³

et al. 2008

J Sci Food Agric

118

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“…While N appears to play a critical role in the uptake and accumulation of Zn in plants, the effect of N fertilization on Zn concentration in crop grain, especially under field conditions is ambiguous. Effect of N fertilizers on crop grain Zn concentration has been shown to be positive (Kutman et al 2010;Shi et al 2010), negative Gao et al 2010b) or absent (Moraghan et al 1999). The mechanism for seemingly conflicting findings on N-Zn relationships remains unknown but is presumably related to soil type, plant-available soil Zn, plant genotypic differences in uptake and translocation of Zn in crops, the application rate of N fertilization and the effect of N on crop yield.…”

Section: Nitrogen Fertilizationmentioning

confidence: 99%

Improving zinc bioavailability in transition from flooded to aerobic rice. A review

Gao

Hoffland

Stomph

et al. 2011

Agron. Sustain. Dev.

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“…The observed range (0Á08-0Á46 mg kg À1 ) at the study site was also low when compared to areas elsewhere in the world where Zn deficiency occurs, e.g. 0Á08-49Á4 mg kg À1 in old rice soils of the Cauvery Delta in India (Savithri et al, 1999), 0Á9-3Á0 mg kg À1 in the Fars province of Iran (Karimian and Yasrebi, 1995), 0Á4-9Á8 mg kg À1 in Ontario Canada (Shang and Bates, 1987), 0Á3-4Á9 mg kg À1 in Minnesota, USA (Moraghan et al, 1999). Contrary to what we would expect, we found no significant differences in soil characteristics or DTPA-extractable Zn content outside and inside the spots.…”

Section: Discussionmentioning

confidence: 83%

Using farmer knowledge to combat low productive spots in rice fields of a Sahelian irrigation scheme

et al. 2004

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In the oldest sections of Burkina Faso's largest irrigation scheme in the Sourou Valley (13 10 0 N, 03 30 0 W) rice (Oryza sativa L.) yields dropped from about 5 to 6 t ha À1 in the early 1990s, shortly after establishment of the scheme, to 2 to 4 t ha À1 from 1995 onwards. Farmers blamed this yield decline on the appearance of 2 to 20 m diameter low productive spots. According to farmers and field measurements, the low productive spots decreased yields by 25-50 per cent. The low productive spots are caused by Zn deficiency. Low Zn availability is related to the very low DTPA-extractable Zn content of the soil (0Á08-0Á46 mg kg À1 ), the alkaline-calcareous character of the soil, the non-application of Zn fertilizers, and a relatively large P fertilizer dose (21 kg P ha À1). Farmers were correct in relating the calcareous nature of the soil to the presence of the low productive spots. They were instrumental in identifying application of decomposed organic resources (e.g. rice straw at 5 t ha À1 ) as a short-term solution that increases yields by 1Á5 to 2Á0 t ha À1. Application of Zn fertilizer (10 kg Zn ha À1) in 29 farmer fields in the 2001 dry season eradicated the low productive spots and increased yields from 3Á4 to 6Á0 t ha À1. Although application of Zn fertilizer is strongly recommended, it is not yet available in Burkina Faso. Based on a comparison of fertilizer prices on the world market and the local market, we expect that the use of Zn fertilizers will be highly profitable (cost/value ratio)2). Despite the relatively recent introduction of irrigated rice cropping, most farmers showed a good understanding of cropping constraints and possible solutions. Both farmers and researchers mutually benefited from each other's knowledge and observations.

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Zinc in wheat grain as affected by nitrogen fertilization and available soil zinc

Cited by 17 publications

References 6 publications

Zinc bioavailability in wheat grain in relation to phosphorus fertiliser, crop sequence and mycorrhizal fungi

Zinc bioavailability in wheat grain in relation to phosphorus fertiliser, crop sequence and mycorrhizal fungi

Improving zinc bioavailability in transition from flooded to aerobic rice. A review

Using farmer knowledge to combat low productive spots in rice fields of a Sahelian irrigation scheme

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