搜索结果: 76-90 共查到“作物栽培学 Rice”相关记录265条 . 查询时间(0.288 秒)
Response of Leaf Water Potential of Rice (Oryza sativa L.) to Evaporative Demand under Paddy Field Conditions : I. Changes with plant development
Evaporimeter Evaporative demand Growth stage Leaf water potential
2009/7/31
Because the leaf water potential (Ψ1) of the rice plant (Oryza sativa L.) is strongly affected by the evaporative demand of the atmosphere under paddy field conditions, and most changes in Ψ1 reflect ...
Effects of the Deep Mater Treatments on the Emergence of Tillers of Rice Plant
Deep water treatment Growth inhibition Growth stage Rice plant Tiller
2009/7/31
We carried out two types of experiments to clarify the emergence of tillers of rice plants under deep water conditions. One (Exp. 1) was to keep the water level constant during the treatment, and the ...
Root System Development of Japonica-Indica Hybrid Rice Cultivars:1. Number and elongation direction of primary roots
Elongation direction Japonica-Indica hybrid rice cultivars Primary root Rice Root Shoot unit
2009/7/30
To characterize the root system of the Japonica-Indica hybrid rice cultivars (Milyang 23, Suweon 258), we compared the number and elongation direction of primary roots both per stem and shoot unit bas...
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,...
The Effect of Plant Nitrogen Condition during Reproductive Stage on the Differentiation of Spikelets and Rachis-Branches in Rice
Nitrogen Rachis-branch Rice Spikelet differentiation Spikelet number
2009/7/30
An increase in rice yield in warmer areas in Japan is limited by the low number of spikelets per unit area, for which a lower efficiency in spikelet production per unit plant nitrogen (N) has been con...
Studies on Agronomic Traits of African Rice (Oryza glaberrima Steud.):II. Dry matter increase and water use efficiency
Annual Dry matter increase Leaf area ratio Oryza glaberrima Oryza sativa
2009/7/30
To compare the time courses of dry matter increase and water consumption in the two cultivated rice species, Oryza sativa L. and O. glaberrima Steud., six strains each of O. glaberrima and O. sativa c...
Eco-Physiological Characteristics Related with Lodging Tolerance of Rice in Direct Sowing Cultivation:II. Root growth characteristics of tolerant cultivars to root lodging
Direct sowing cultivation Dry matter partitioning Oryza sativa L Rice Root Root lodging
2009/7/30
The dry weight of each organ including root in topsoil, root density in each soil layer and root morphology of rice plant (Oryza sativa L.) were compared among USA cultivars, semi-dwarf (panicle weigh...
Studies on Agronomic Traits of African Rice (Oryza glaberrima Steud.):III. Some grain morphological aspects of domestication and decrement
Decrement Domestication Grain shape Grain volume Oryza glaberrima Oryza sativa West Africa
2009/7/29
To identify some characteristics of Oryza glaberrima in grain morphology, length (L), width (W) and thickness (T) of unhusked grain were determined for two cultivated species, i.e. O.sativa and O.glab...
Effects of Physiological and Morphological Characteristics of Root Tips Excised from Rice Seminal Roots on Subsequent Growth in vitro
Age C·N content Elongation rate Excised root culture Lateral root Oryza sativa L
2009/7/29
Tissue culture of excised root is a useful method with which genetic variation of plant root itself can be determined without the influence of shoot. We aimed to determine the effects of age and elong...
Differences in Amylose Content, Amylographic Characteristics and Storage Proteins of Grains on Primary and Secondary Rachis Branches in Rice
Amylographic characteristics Amylose Glutelin Palatability Prolamin Rachis branch
2009/7/29
The amylose content, amylographic characteristics and storage proteins of milled rice grains on the primary and secondary rachis branches were investigated. The amylose content of grains on the primar...
Effect of Sodium Chloride on the Panicle and Spikelet Morphogenesis in Rice:I. External shoot morphology during young panicle formation
Environmental stress Heading Morphogenesis Rice Salinity Tiller Young panicle formation
2009/7/29
The effect of salinity stress on external shoot morphology in relation to panicle development was studied. Three rice cultivars, Nipponbare, as a Japonica-type rice, Blue bonnet as a Javanica-type, an...
Relationship between Leaf Water Content and Temporary Increase in the Net Photosynthetic Rate Caused by Leaf Excision from Leaf Sheath in the Rice Plant
β-Ray transmittance Intercellular CO2 concentration Leaf excision Leaf water content Photosynthesis Rice
2009/7/29
The photosynthetic rate and the water content in the rice leaf of potted plant, cv. Yamabiko, Ochikara and Araki, were measured simultaneously by the assimilation chamber method and by β-ray transmitt...
Studies on the Salt Tolerance in Korean Rice Cultivars : I. Mechanism of salt tolerance in dry matter production and leaf photosynthesis
Cultivar difference NaCl treatment Oryza sativa L Osmotic adjustment Photosynthesis
2009/7/29
Reduction of relative growth rate (RGR) due to the NaCl treatment was examined in the seedlings of six Korean rice cultivars which had been reported to be different in salt tolerance on the level of ...
Four Decades of Breeding for Varietal Improvement of Irrigated Lowland Rice in the International Rice Research Institute
Breeding Disease resistance Grain quality Insect resistance Irrigated rice Yield potential
2009/7/29
Since the establishment of the International Rice Research Institute (IRRI) in 1960, IRRI’s breeding effort in varietal improvement for irrigated lowland has passed four decades. Breeding of semi-dwar...
Contribution of Sink and Source Sizes to Yield Variation among Rice Cultivars
Dry matter production Nitrogen application Non-structural carbohydrate Sink Source and Yield
2009/7/29
In order to identify the key factors that arrest yield improvement in rice, we observed fifteen divergent cultivars in a field at Kyoto, Japan in 1995 and 2001 under various nitrogen (N) regimes. The ...