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Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : VIII. Effect of ambient humidity on dry matter production and nitrogen absorption at various temperatures
Dry matter production Heavy nitrogen Nitrogen absorption Relative humidity Rice.
2009/8/4
The effect of relative humidity (RH) on the dry matter production and nitrogen absorption of rice seedlings (age in leaf mumber of 5) was investigated. Plants were grown for 4 days under 60 or 90% RH ...
Patterns of Soil Nitrogen Release in Paddy Fields of Warm Regions in Japan and Diagnosis of Fertilizer Application : II. Characteristics of soil nitrogen mineralization and nitrogen uptake patterns of rice plants in Fukuoka Prefecture
Amount of nitrogen uptake Fertilizer nitrogen Nitrogen mineralization Paddy soils Soil nitrogen
2009/8/4
Topsoils collected from various regions in Fukuoka Prefecture were incubated and the amount of mineralized nitrogen was measured. The relationship between the mineralized nitrogen amount (N) and the ...
Effects of Kinetin on the Development of Tillers in Rice Plants
Cytokinin Kinetin Light intensity Rice Tiller
2009/8/4
We observed the efffects of kinetin absorbed from roots on the growth of main stem and tillers in rice plants grown in solution culture. The growth of the plants in plant length, plant age expressed ...
Floral Impotency Due to Cool Weather in Paddy Rice Plants in the Early-season Culture Area : III. Effect of growth retardant on the reduction of necessary water depth in the deep irrigation method at the booting stage
Antiauxin Cool-summer damage Growth retardant IBP Inabenfide Necessary water depth in deep irrigation method Paclobutrazol Uniconazole
2009/7/31
For the purpose of improving the deep irrigation method as a countermeasure of floral impotency due to cool weather by means of a reduction of the necessary water depth to protect young panicles, stu...
Varietal Difference in the Effects of Applied Gibberellic Acid (GA3) on the Number of Spikelets per Panicle in Rice Plants
GA3 Gibberellic acid application Internode diameter Number of spikelets per panicle Rice Varietal difference
2009/7/31
Eight rice varieties were grown in pots and the varietal difference in the effects of applied gibberellic acid (GA3) on the number of spikelets per panicle were examined. GA3 (5 ppm) was sprayed onto ...
The Difference of Diurnal Changes in Photosynthesis in Rice Plants with Different Root Activities Induced by Soluble Starch Application to the Soil
Diurnal change Photosynthesis Rice plant Root activity Rubisco activation %
2009/7/30
In order to verify the difference in diurnal changes in photosynthesis in rice plants with different root activities, the experiment was conducted with a control plant and a soluble starch-applied pla...
Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : IX. Effects of water stresses induced by low humidity and the addition of polyethylene glycol to the medium on growth
Dry matter partitioning ratio Polyethylene glycol 6000 Relative humidity Rice T-R ratio
2009/7/30
Rice seedlings were grown on a medium containing polyethylene glycol (PEG), which lowers the osmotic potential of the medium under high humidity, or on a medium containing no PEG under a low humidity,...
Morphological Studies on the Regularity of Shoots Development in Rice Plants:IV. Structural regularity in the growth types of tillers and their mother shoots
Growth Growth type Leaf Morphogenesis Oryza sativa Rice plant Shoot development Tiller
2009/7/30
It has already shown that the main shoots of two different growth types coexist even in a precisely cultured plot. These types are : (i) N type with n leaves, (ii) N-1 type with n-1 leaves ; these typ...
Effects of Short Period Treatments at Low Temperature (9°C) on Growth of Rice Plants at the Tillering Stage
Growth Leaf blade length Leaf sheath length Low temperature Main stem Rice plant
2009/7/30
The rice plants cv. Sasanishiki (3 plants/pot) were moved into the controlled growth chamber at 9°C when half of the leaf blade (LB) of the 7th leaf (L7) was emerged (H plot) or when the whole 7th lea...
Regularity in Variation of Leaf Color and Nitrogen Distribution in Half-leaf Blades by Leaf Position on the Stems of Rice Plants:I. Variation of chlorophyll meter values and mechanism of leaf formation
Chlorophyll meter Concordance Cultivar Half-leaf blade Leaf blade width Leaf color
2009/7/29
We clarified that the degrees of the difference in color between outside and inside half-leaves were unexpectedly large, which ranged from 1.3 to 5.4 values by the Minolta chlorophyll meter SPAD-502 (...
Analysis of Factors Concerning Bleeding Rate from the Basal Part of Stem in Rice Plants
Bleeding Rice Root respiration Temperature quotient
2009/7/29
The measurement of bleeding from the basal part of the stem had been applied to estimation for root activity of rice. However, the bleeding rate (BL) showed wide variation among test plants. We invest...
Effect of Foliar Application of Triacontanol on Growth and Yield of Rice Plants : III. Its relevance to the development of roots
Foliar application Growth Rice plants Root activity Roots Triacontanol Weight of hulled rice
2009/7/29
The purpose of this study was to clarify the effects of triacontanol (TRIA) on the roots growth and the appearance stage of the effects, and to clarify the relationship between root development and hu...
Relationship between Root Respiration and Silica : Calcium Ratio and Ammonium Concentration in Bleeding Sap from Stem in Rice Plants during the Ripening Stage
Ammonium Bleeding Calcium Rice Root respiration
2009/7/29
Rice plants were given various treatments, such as organic matter application, a large amount of nitrogen as topdressing and light shading of 75%, and ammonium (NH3), silica (SiO2) and calcium (Ca) in...
Release Level of Momilactone B from Rice Plants
Allelopathy Growth inhibitor Momilactone B Oryza sativa Rice Root exudate
2009/7/28
Release Level of Momilactone B from Rice Plants.
Analysis of the Dry Matter Production Process Related to Yield and Yield Components of Rice Plants Grown under the Practice of Nitrogen-Free Basal Dressing Accompanied with Sparse Planting Density
Dry matter production Nitrogen-free basal dressing Rice cultivars Sparse planting density Weather conditions
2009/7/28
Experiments were carried out in 1999, 2000 and 2001 on the field of Iwate University, Japan to examine the effect of nitrogen-free basal dressing accompanied with sparse planting density (BNo) on the ...