Local soil reduction in the vicinity of the paddy rice seed coated with oxygen generating chemicals in relation to germination and emergence.

Hagiwara, Motoyuki; Imura, Mitsuo; Mitsuishi, Shozo

doi:10.1626/jcs.59.56

Cited by 12 publications

(9 citation statements)

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“…This indicates that the application of molybdate would improve establishment without affecting redox potential, although molybdate ions (MoO 4 2-) contain oxygen. In contrast, calcium peroxide, which is generally used as an oxygen-generating chemical in direct rice seeding, improves establishment by maintaining a high redox potential (Hagiwara et al, 1990).…”

Section: Molybdate Improves Establishmentmentioning

confidence: 99%

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Improvement of Rice Seedling Establishment in Sulfate-Applied Submerged Soil by Application of Molybdate

Hara

2013

Plant Production Science

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Sulfide ion generation in strictly reduced soil might be a factor impairing rice seedling establishment. The molybdate ion is known to suppress the microbial transformation of sulfide ions from sulfate ions. I investigated the effect of molybdate on rice establishment in sulfateapplied submerged soil. The establishment of rice seeds sown in sulfate-applied submerged soil was markedly improved by application of potassium molybdate at a rate of 1.5−15 mmol kg -1 dried soil. The application of potassium molybdate delayed the decline of the sulfur concentration in the soil solution near the seeds and the appearance of circular black stains, or insoluble iron sulfide indicating the generation of sulfide ion, around seeds in the soil. Irrespective of the application of molybdate, the redox potential near the seeds was low enough to allow generation of sulfide ions, implying that molybdate suppresses the generation of sulfide ions with no effect on redox potential. These results suggest that the application of molybdate could improve rice seedling establishment in sulfur-rich submerged soil by suppressing the generation of sulfide ions, that is a possible factor suppressing the establishment of rice seeds sown in sulfur-rich submerged soil.

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Section: Molybdate Improves Establishmentmentioning

confidence: 99%

“…The positive effect on establishment might be maintained by a small amount of molybdenum. In contrast, the calcium peroxides generally used in direct seeding are exhausted rapidly (Hagiwara et al, 1990).…”

Section: Efficacy Of Molybdate Applicationmentioning

confidence: 99%

Improvement of Rice Seedling Establishment in Sulfate-Applied Submerged Soil by Application of Molybdate

Hara

2013

Plant Production Science

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“…Seeds were placed 10 mm below the soil surface with a thin rod. We selected this sowing depth referring to previous reports (Hagiwara et al, 1990;Yoshinaga et al, 2000;Sato and Maruyama, 2002;Tsuchiya et al, 2004) and direct-sowing culture practice standards in Japan.…”

Section: Plants and Growth Conditionsmentioning

confidence: 99%

“…Seed coating with calcium peroxide (CaO 2 ) was developed to improve plant growth during seedling establishment in direct sowing (Mitsuishi and Nakamura, 1977), but seedling establishment remains unstable because local soil is reduced when fi elds are fl ooded (Hagiwara et al, 1990). Oba (1997) found that drainage after sowing effectively improves seedling emergence when CaO 2 -coated seeds were direct-sown into puddled and leveled soil.…”

mentioning

confidence: 99%

Seedling Growth and Dry-Matter Production under Drained Conditions in Rice Direct-Sown into Puddled and Leveled Soil

Satô

Maruyama

2005

Plant Production Science

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“…Deoxidization of sulfates results in the production of detrimental H 2 S gas, followed by a low activity of Fe ++ ions due to the formation and deposition of FeS. In order to compensate for the severe oxygen deficiency in direct seeding, pregerminated rice seeds are coated with calcium peroxide (CaO 2 ) powder (e.g., Hagiwara et al 1990). These cultivation techniques have, to some extent, improved seedling establishment in direct seeding (Mitsuishi and Imura 1982).…”

Section: Introductionmentioning

confidence: 99%

Varietal Variations in Rice Seedling Growth under Low Oxidation-Reduction Potentials.

2002

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In direct seeding of rice (Oryza sativa L.), rice seedlings are exposed to low oxidation-reduction (redox) potential soil, and to low temperatures in cold areas. In order to trace the genealogy of tolerance to low redox potential among Japanese rice cultivars, we selected 12 Japanese rice cultivars that had been released over the past century and determined the ability of their seedlings to tolerate immersion in low redox culture solution of Eh = −150 to −180 mv. Seedlings with coleoptiles and radicles of about 1 to 2 cm were incubated in low redox potential culture solution for 2 days at 18 and 30°C, and then in distilled water for 3 days at the same temperatures to examine the recovery abilities. The lengths of shoots and roots were measured after pre-germination, after low redox treatment, and after recovery from damage that occurred in the de-oxidized solution. At 30°C, the tolerance of low redox potentials was positively and significantly correlated with recovery from damage that occurred in the de-oxidized solution. The high tolerance of recent cultivars to these low redox potentials at 30°C appeared to originate from Fujisaka 5. However, at 18°C, the differences among the cultivars in their tolerance of low redox potentials and in their ability to recovery became small.

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Local soil reduction in the vicinity of the paddy rice seed coated with oxygen generating chemicals in relation to germination and emergence.

Cited by 12 publications

References 0 publications

Improvement of Rice Seedling Establishment in Sulfate-Applied Submerged Soil by Application of Molybdate

Improvement of Rice Seedling Establishment in Sulfate-Applied Submerged Soil by Application of Molybdate

Seedling Growth and Dry-Matter Production under Drained Conditions in Rice Direct-Sown into Puddled and Leveled Soil

Varietal Variations in Rice Seedling Growth under Low Oxidation-Reduction Potentials.

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