Studies on the Varietal Adaptability for Heavy Manuring in Rice : 2. Effect of silica upon the adaptability of the rice plant for heavy manuring in relation to photosynthesis

Iwata, Iwaho; Baba, Isamu

doi:10.1626/jcs.30.237

Cited by 12 publications

(6 citation statements)

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“…The Indica-type varieties IR 8, IR 24, IR 36, IR 64, Taichung Native 1 and Milyang 23 in cluster V were bred by crossing and introducing sd-1 (Ashikari et al 2002, Nagata 2006. Japanese breeding and research to obtain high-yielding varieties were applied small numbers of varieties in the early 1930s (Ohata 1989), and adaptability to heavy manuring was reported by Takahashi et al (1959), Takeda and Kumura (1959), Iwata and Baba (1962), and Osada and Murata (1962). In these breeding studies, rice varieties that did not show luxuriant or spindly growth under high nitrogen conditions were developed and characterized (Baba 1956).…”

Section: Discussionmentioning

confidence: 99%

Genetic variations in dry matter production and physiological nitrogen use efficiency in rice (<i>Oryza sativa</i> L.) varieties

2009

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The objective of this study was to investigate varietal differences in dry matter production and physiological nitrogen use efficiency (PNUE) using a wide range of rice (Oryza sative L.) varieties at an early growth stage. The results provide useful information for breeding suitable varieties for cultivation under conditions of low soil fertility or with reduced fertilizer use for sustainable agriculture. Thirty-one rice varieties were used, and seedlings were grown under 8 nitrogen treatment conditions. The effects of natural variations in embryo and/or endosperm size on initial growth were controlled for by comparing the relative dry weight (RDW) of nitrogen-treated samples and controls. The rice varieties were classified into 5 groups by cluster analysis. Overall, the present study found that there are wide variations in PNUE among varieties with similar levels of RDW under varying nitrogen conditions. Variations in PNUE were greater under lower nitrogen conditions; in contrast, variations in RDW were greater under higher nitrogen conditions. These data, along with those of other studies, indicate differences in nitrogen use efficiency between Indica-and Japonicatypes, upland and lowland varieties, and landraces and improved types.

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Section: Discussionmentioning

confidence: 99%

Genetic variations in dry matter production and physiological nitrogen use efficiency in rice (<i>Oryza sativa</i> L.) varieties

2009

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“…En effet, le silicium, par sa rigidité, permet une meilleure disposition des feuilles vis-à-vis du rayonnement solaire et permet donc d'augmenter la capacité de photosynthèse de la plante (Iwata et Baba, 1962 ;Yoshida ef ai, 1969 ;Cock et Yoshida, 1970 4.…”

Section: -Silicium Et Photosynthèseunclassified

Cycle et rôle du silicium d'origine végétale dans les écosystèmes forestiers tempérés

Bartoli¹,

Souchier²

1978

Ann. Sci. forest.

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RésuméLa silice est à la fois constituant essentiel des minéraux des sols et de la composition minérale des végétaux. Elle est en effet intensément recyclée par la végétation où elle est stockée dans les tissus épi-dermiques des feuilles sous forme d'incrustations siliceuses appelées phytolithes.L'étude de cette silice d'origine végétale permet de différencier les écosystèmes forestiers et les teneurs en silice foliaire donnent des informations physiologiques, pédogénétiques, voire sylvicoles et agronomiques, très intéressantes.Ainsi, la teneur en silice foliaire est un bon indicateur de la transpiration de la plante, et par là, un élément de diagnostic pour utiliser certaines pratiques sylvicoles d'irrigation ou d'éclaircies.D'autre part, la silice d'origine végétale (phytolithes) est un bon traceur de l'activité biologique des litières et de l'humus. Ainsi, les phytolithes s'accumulent dans les podzols, à activité biologique ralentie, où elles fixent dans les horizons spodiques Bh une partie de l'azote facilement accessible à l'activité biologique.A l'opposé, les phytolithes sont rapidement biodégradés en milieu biologiquement actif et le silicium rendu ainsi assimilable pour la végétation, permettrait d'augmenter la croissance des peuplements forestiers.

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“…Silicon increases resistance of rice to diseases and insect pests (11), but under good management, which is common in Japan, it seems unlikely that the beneficial effects of silicate application are always related to less disease and insect damage. Response to silicate application should be greatest When there is luxurious growth owing to liberal applications of nitrogen, which tends to decerase leaf angle (8,14). We feel that the tnaintenance of a large leaf angle by silicate ~pp1ication can easily account for a 10 percent Increase in the photosynthesis of the canopy and hence a similar increase in yield when nitrogen input is large.…”

Section: Methodsmentioning

confidence: 99%

“…Among them, Iwata et al (14) reported that ~ilicate application maintains erect leaves which increases photosynthesis and thus improves plant growth.…”

mentioning

confidence: 99%

An assessment of tile effects of silicate application on rice by a simulation method

Cock

Yoshida

1970

Soil Science and Plant Nutrition

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Studies on the Varietal Adaptability for Heavy Manuring in Rice : 2. Effect of silica upon the adaptability of the rice plant for heavy manuring in relation to photosynthesis

Cited by 12 publications

References 0 publications

Genetic variations in dry matter production and physiological nitrogen use efficiency in rice (<i>Oryza sativa</i> L.) varieties

Genetic variations in dry matter production and physiological nitrogen use efficiency in rice (<i>Oryza sativa</i> L.) varieties

Cycle et rôle du silicium d'origine végétale dans les écosystèmes forestiers tempérés

An assessment of tile effects of silicate application on rice by a simulation method

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