Download or read book Growth and Productivity of Irrigated Rice oryza Sativa L for a Tropical High Altitude Environment in Rwanda written by Elie Rene Gasore and published by . This book was released on 2016 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yield components, grain yield, biomass and plant N accumulation, and N fertilizer responses of irrigated rice (Oryza sativa, L.) were evaluated for a tropical inland valley environment in the high altitudes in Rwanda. Effects were measured for nitrogen (N) fertilizer rate (0, 60, 90,120,150,180 kg N ha-1), season, growth stage and cultivar of different subspecies and plant types during 2012 dry season (DS) and 2013 wet season (WS) at Cyili Rice Research Farm (1380 m above sea level). Variations in irradiance (17.2+/- 0.32 MJ m-2 day-1 in DS and 9.4 +/- 0.66 MJ m-2 day-1in WS) were linked to seasonal differences in biomass and closely related to N responses, yield components and the grain yields which were greater in the DS (9.0 t ha-1) than in the WS (5.3 t ha-1). Total plant N uptake was in the same range (200 to 250 kg N ha-1) for both seasons at maturity. Grain yields were highly correlated (r2 = 0.89) to yield components and mostly with the number of spikelets per panicle (r2 = 0.70) and spikelets per m2 (r2 = 0.80). In most cases, yield components were equivalent or greater to the potential under irrigated lowlands in the tropics of Asia and the highest farm yields (8 to 10 t ha-1) in the temperate. Rice genotypes of Indica x Japonica subspecies combinations were overall greater in yield, harvest index and in important yield components. Crop growth rate (CGR) over seasons and cultivars was 11g m-2 day-1 at maturity. The average total crop duration of 145 days may be considered as the current optimal for achieving the yield potential obtained in the irrigated lowlands of the tropics in Asia. Responses to N fertilizer addition were generally minimal with most measured attributes maximized when the lowest N rate of only 60 kg N ha-1 was applied. This suggested a large contribution from the native soil N reserves linked to ample amounts of total soil N (2.80 +/- 0.34 g kg soil-1). The Indica x Japonica combinations may represent a cultivar improvement strategy for greater adaptation and grain yield and quality in Rwanda.
Download or read book Solar Radiation and the Growth and Productivity of Upland Rice oryza Sativa in West Africa written by Joshua Lowe Posner and published by . This book was released on 1978 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Various Levels of Nitrogen Through Organic Sources on Growth and Yield of Irrigated Aerobic Rice Oryza Sativa L written by Siddaram and published by . This book was released on 2009 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Irrigation Schedule on Growth Yield and Quality of Different Rice Varieties Oryza Sativa L Under Direct Seeded Conditions With CD Copy written by Raman Sharma and published by . This book was released on 2019 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Management of Irrigated Rice in the Changing Environments of the Sahel written by Michiel E. de Vries and published by . This book was released on 2011 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rice Almanac 4th edition written by J. Maclean and published by IRRI. This book was released on 2013-12-01 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth edition of the Rice Almanac continues the tradition of the first three editions by showcasing rice as the most important staple food in the world and all that is involved in maintaining rice production. It also breaks new ground in its coverage of issues related to rice production, both environmental--including climate change--and its importance for food security and the global economy. It also further expands coverage of the world’s rice production area by featuring 80 rice-producing countries around the world.
Download or read book Influences of planting reasons of growth development and yield performance of the rice plant Oryza sativa L in the Llanos Orientales of Colombia South America written by Dietrich Leihner and published by . This book was released on 1975 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Planting Time on Growth and Yield of Dwarf Scented Rice Oryza Sativa L Varieties written by Palivela Murali Krishna and published by . This book was released on 1994 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influences of Planting Seasons on Growth Development and Yield Performances of the Rice Plant Oryza Sativa L in Te Llanos Orientales of Colombia South America written by Dietrich Liehner and published by . This book was released on 1975 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of High Temperature Upon Photosynthesis Respiration and Growth and Yield of Rice Plants written by Chwen-Ming Yang and published by . This book was released on 1990 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rice in Human Nutrition written by Bienvenido O. Juliano and published by Int. Rice Res. Inst.. This book was released on 1993 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: On title page & cover: International Rice Research Institute
Download or read book Rice Improvement written by Jauhar Ali and published by Springer Nature. This book was released on 2021-05-05 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY 4.0 license. By 2050, human population is expected to reach 9.7 billion. The demand for increased food production needs to be met from ever reducing resources of land, water and other environmental constraints. Rice remains the staple food source for a majority of the global populations, but especially in Asia where ninety percent of rice is grown and consumed. Climate change continues to impose abiotic and biotic stresses that curtail rice quality and yields. Researchers have been challenged to provide innovative solutions to maintain, or even increase, rice production. Amongst them, the ‘green super rice’ breeding strategy has been successful for leading the development and release of multiple abiotic and biotic stress tolerant rice varieties. Recent advances in plant molecular biology and biotechnologies have led to the identification of stress responsive genes and signaling pathways, which open up new paradigms to augment rice productivity. Accordingly, transcription factors, protein kinases and enzymes for generating protective metabolites and proteins all contribute to an intricate network of events that guard and maintain cellular integrity. In addition, various quantitative trait loci associated with elevated stress tolerance have been cloned, resulting in the detection of novel genes for biotic and abiotic stress resistance. Mechanistic understanding of the genetic basis of traits, such as N and P use, is allowing rice researchers to engineer nutrient-efficient rice varieties, which would result in higher yields with lower inputs. Likewise, the research in micronutrients biosynthesis opens doors to genetic engineering of metabolic pathways to enhance micronutrients production. With third generation sequencing techniques on the horizon, exciting progress can be expected to vastly improve molecular markers for gene-trait associations forecast with increasing accuracy. This book emphasizes on the areas of rice science that attempt to overcome the foremost limitations in rice production. Our intention is to highlight research advances in the fields of physiology, molecular breeding and genetics, with a special focus on increasing productivity, improving biotic and abiotic stress tolerance and nutritional quality of rice.
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Download or read book Symposium on Potential Productivity of Field Crops Under Different Environments written by W. H. Smith and published by Int. Rice Res. Inst.. This book was released on 1983 with total page 533 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological basis, physical environment, and crop productivity; Growth and yield of field crops; Crop productivity under different environments; Increasing productivity through cropping systems.
Download or read book Rice Production Worldwide written by Bhagirath S. Chauhan and published by Springer. This book was released on 2017-02-16 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses aspects of rice production in rice-growing areas of the world including origin, history, role in global food security, cropping systems, management practices, production systems, cultivars, as well as fertilizer and pest management. As one of the three most important grain crops that helps to fulfill food needs all across the globe, rice plays a key role in the current and future food security of the world. Currently, no book covers all aspects of rice production in the rice-growing areas of world. This book fills that gap by highlighting the diverse production and management practices as well as the various rice genotypes in the salient, rice-producing areas in Asia, Europe, Africa, the Americas, and Australia. Further, this text highlights harvesting, threshing, processing, yields and rice products and future research needs. Supplemented with illustrations and tables, this text is essential for students taking courses in agronomy and production systems as well as for agricultural advisers, county agents, extension specialists, and professionals throughout the industry.
Download or read book Culture of Fish in Rice Fields written by Matthias Halwart and published by WorldFish. This book was released on 2004 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1989-03 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
