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Studies on Heading Characteristics of Primary and Secondary Tillers in Rice(Oryza sativa L.) : I. Influence of leaf cutting on heading characteristics of primary and secondary tillers
Delayed heading Heading date Leaf cutting treatment Main stem Panicle initiation
2009/7/31
The purpose of this experiment was to identify the cause of the differences in the heading date and the time of panicle differentiation among individual tillers in a plant. Three varieties, Norin 1, N...
Depression of Photosynthesis in Rice Plant with Low Root Activity Following Soluble Starch Application to the Soil
Initial Rubisco carboxylation activity Photosynthesis Rice plant Rubisco content Root activity Soluble starch
2009/7/30
Soluble starch was applied to soil in a pot where rice plant grew at the 10th leaf stage and the initial heading stage. When root activity and leaf bleeding rate were lowered in the treated plant, ph...
Sterility in Rice (Oryza Sativa L.) Subject to Drought during the Booting Stage Occurs not because of Lack of Assimilate or of Water Deficit in the Shoot but because of Dehydration of the Root Zone
Booting stage Degeneration of spikelet Dehydration Drought Oryza sativa L
2009/7/30
In rice plants a drought at the booting stage is the event most damaging to grain yield because it drastically increases sterility. Our objective was to establish what phosiological processes caused s...
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...
A Basic Study on Field Experiment and Investigation Methods in Rice Plant:V. A leaf area survey method effective in laborsaving while maintaining precision
Double sampling Field experiment Leaf area Precision Ratio estimate Rice plant Sample survey
2009/7/30
Leaf area of rice plant is an important character for survey to elucidate its characteristics of dry matter production. However, it requires much time and labor to precisely estimate the leaf area, w...
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...
Studies on Seedling Emergence and Establishment in Direct Sowing of Paddy Rice into Paddled and Leveled Soil as Influenced by Local Soil-Environment around Seed
Seedling Emergence Direct Sowing of Paddy Rice Paddled and Leveled Soil
2009/7/29
Studies on Seedling Emergence and Establishment in Direct Sowing of Paddy Rice into Paddled and Leveled Soil as Influenced by Local Soil-Environment around Seed.
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 the Factors of High Yielding Ability for a Japonica Type Rice Line, 9004, Bred in China : I. Comparison of yielding ability with a Japanese rice variety under the same level of spikelets number per area
Grain-straw ratio High yielding ability Nitrogen topdressing Phosphoric acid topdressing
2009/7/29
9004 (L9), which is a high yielding japonica type glutinous rice line developed in Jiangsu province, China, was cultivated under different combinations of nitrogen (N) application with or without pho...
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...
Comparison of Water Use Efficiency of Paddy Rice (Oryza sativa L.) among Locations and Interannual Variation in Humid Areas : 1. Reliability of estimated canopy transpiration rate from meteorological and physiological data of the crop
Canopy resistance Evapotranspiration Leaf area index Penman-Monteith method Rice Stomatal conductance
2009/7/29
The transpiration rate is affected not only by meteorological but also by physiological and structural factors of the crop. Our objectives were to develop a method of estimating the transpiration rate...
Comparison of Internodal Elongation between Asian Deepwater Rice and Its Wild Relatives
Deepwater rice Elongation ability Floating rice Lowest elongated internode (LEI) Wild rice
2009/7/29
Using 747 varieties of Asian deepwater rice (Oryza sativa) and 112 strains of wild rice including O.rufipogon. O, nivara, and their intermediates, the position of the lowest elongated internode (LEI) ...
Analysis of Lodging-Resistant Characteristics of Different Rice Genotypes Grown under the Standard and Nitrogen-Free Basal Dressing Accompanied with Sparse Planting Density Practices
Breaking strength Lodging Lower internodes Nitrogen-free basal dressing Rice cultivars Sparse planting density
2009/7/29
Field experiments were carried out in 2001 and 2002 to examine the lodging-resistance characteristics of various rice cultivars bred for the Tohoku region of Japan including the widely-cultivated cult...
Geostatistical Analysis of Yield,Soil Properties and Crop Management Practices in Paddy Rice Fields
Crop managementGeostatistics Multivariate analysis Nitrogen Oryza sativa L. Precision agriculture Soil physicochemical property Spatial variability
2009/7/28
We examined the possible benefit of rational site-specific crop management practices in 17 paddy fields located in an area of 2.0 ha for the prevalence of precision agriculture methods on a cooperativ...
Varietal Differences in the Responses of Yield Components of Rice Plants to Nitrogen-Free Basal Dressing Accompanied with Sparse Planting Density in the Tohoku Region of Japan
Nitrogen-free basal dressing Rice cultivars Sparse planting density Weather conditions Yield components
2009/7/28
Grain yield of rice plants is composed of different yield components that vary with the genotype, environmental condition and cultivation practice. Experiments were conducted in 1999, 2000 and 2001 in...