搜索结果: 1-15 共查到“农学 Lowland rice”相关记录19条 . 查询时间(0.119 秒)
Labor-Saving Weed Technologies for Lowland Rice Farmers in sub-Saharan Africa
Chemical weed control hand weeding irrigated lowland mechanical weed contro
2015/12/23
Time requirements, weed control efficacy, and yield effects of three labor-saving weed technologies
were tested against hand weeding during three seasons in 2012 and 2013. The technologies incl...
Integrated management of African rice gall midge (AfRGM) (Orseolia oryzivora, Harris and gagné), weeds and diseases of lowland rice
African Rice Gall Midge Diseases Lowland Rice Rice Nematode IPM Nigeria
2013/2/28
Studies were conducted during the 2001 and 2002 cropping years at Edozhigi and Sachi in the Southern Guinea Savannah of Nigeria to study the effect of following rice with another crop on the next rice...
Effect of Organic Sources and Urea on N Transformation and Yield of Lowland Rice Grown in Clay Loam Soil
N forms yield organics urea NUE rice
2010/11/15
Field experiments were conducted during Kharif 2006 and 2007 in clay loam soil to study the
effect of organic sources and urea on N transformation and yield of rice. The treatments consisted of addit...
High-yielding Crop Management by Enhancing Growth in Reproductive Stage of Direct-Seeded Rainfed Lowland Rice (Oryza sativa L.) in Northeast Thailand
Biomass production Growth duration Nitrogen uptake Reproductive stage
2010/3/4
The crop management in direct-seeded rice to promote growth during the reproductive stage was evaluated in weed-controlled toposequentially intermediate fields in a small watershed in Northeast Thaila...
Correlation of the Amount of Nitrogen Accumulated in the Aboveground Biomass at Panicle Initiation and Nitrogen Content of Soil with the Nitrogen Uptake by Lowland Rice during the Period from Panicle Initiation to Heading
Nitrogen uptake Oryza sativa L. Precision agriculture Recovery ratio Soil nitrogen Topdressing
2009/7/29
To estimate the site-specific optimal amount of nitrogen (N) to be applied as top-dressing (N top-dressing) at panicle initiation, we examined the effects of the amount of N accumulated in the abovegr...
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...
Effect of Plot Size on Accuracy of Yield Estimation of Rainfed Lowland Rice Genotypes with Different Plant Heights and Grown under Different Soil Fertility Conditions
Competition Plant height Plot size Rice genotypes Selection trial Yield estimation
2009/7/29
Breeding programs for rainfed lowland rice normally use large plot sizes for accurate estimation of yield. Resource requirements are reduced and more genotypes can be tested if a small plot size can b...
Genotypic Variation in Response of Rainfed Lowland Rice to Prolonged Drought and Rewatering
Drought Drought recovery Osmotic adjustment Rainfed lowland rice Root
2009/7/29
Duration of the drought period is important for plant response during drought and after rewatering. We hypothesized that, if drought duration is extended, (1) high seedling vigor and rapid developmen...
Topographic Position Influences Water Availability in Rainfed Lowland Rice at Rajshahi,Northwest Bangladesh
Rainfed lowland Rice Soil water Topography Yield
2009/7/28
Topographic Position Influences Water Availability in Rainfed Lowland Rice at Rajshahi,Northwest Bangladesh.
Estimating Percolation and Lateral Water Flow on Sloping Land in Rainfed Lowland Rice Ecosystem
Percolation Rice Toposequence Water table
2009/7/24
Quantifying water losses in paddy fields assists estimation of water availability in rainfed lowland rice ecosystem. Little information is available on water balance in different toposequence position...
Molecular Breeding for Rainfed Lowland Rice in the Mekong Region
Grain quality Marker-assisted selection Molecular breeding Rice
2009/7/24
In the past 20 years, the rice-breeding program in Thailand had little success in developing new cultivars to replace Kao Dawk Mali 105 (KDML105) and Kao Khor 6 (RD6) for the rainfed lowland rice envi...
Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?
Aerobic culture Controlled release fertilizers Early transplanting Hybrids Plant density SRI
2009/7/24
The annual rate of rice yield increase in the world declined from 2.7 % in the 1980s to 1.1 % in the1990s. The continued world population increase requires resumption of the previous rate. The objecti...
Effects of Soil Clay Content on Water Balance and Productivity in Rainfed Lowland Rice Ecosystem in Northeast Thailand
Oryza sativa Paddy Percolation Seepage Water table
2009/7/23
Water availability is one of the determinants of productivity of rainfed lowland rice (Oryza sativa L.). Quantifying water losses from a paddy field, such as deep percolation and lateral seepage, assi...
Relay-Intercropping of Stylosanthes guianensis in Rainfed Lowland Rice Ecosystem in Northeast Thailand
Dry season Forage production Green manure Nutrient deficit Rainfed rice
2009/7/23
We evaluated the usefulness of the Stylosanthes guianensis (stylo)- rice relay-intercropping system for increasing agricultural productivity in Northeast Thailand. Although large production variabilit...
Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying;Evidence for Root Signals
Drought Rainfed lowland Rice Root signals Stomatal conductance Water deficit
2009/7/21
The role of root signals in water deficit responses of rice (Oryza sativa L.) is important in the alternate flooding and drying conditions encountered in the rainfed lowlands, where the abundant roots...