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A Tale of Two Countries: Spatial and Temporal Patterns of Rice Productivity in China and Brazil AgEcon
You, Liangzhi.
This paper examines differences in the spatial and temporal variations of rice yields in China and Brazil. Our analysis indicates that, in China, rice yields have converged over time and rice production has become increasingly homogeneous. In contrast, rice yields in Brazil have diverged over time, primarily due to variations in upland rice yields. Three hypothetical explanations may account for the different behaviors of rice yields in Brazil and China, namely: 1) differences in production systems (i.e. irrigated in China vs. upland in Brazil); 2) changes in rainfall patterns; and 3) bias in agricultural research and development (R&D) towards irrigated rice. Our empirical analysis supports the first two hypotheses by establishing that: 1) upland rice...
Tipo: Working or Discussion Paper Palavras-chave: Rice productivity; Spatial convergence; Technology spillover; China; Brazil; Crop Production/Industries; Productivity Analysis.
Ano: 2008 URL: http://purl.umn.edu/42333
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Effect of Nitrogen Rates and Split Nitrogen Fertilization on Grain Yield and its Components in Flooded Rice Chilean J. Agric. Res.
Hirzel,Juan; Pedreros,Alberto; Cordero,Karla.
Nutritional management in rice (Oryza sativa L.) crops is mainly associated with N fertilization, which is difficult to adjust in field conditions due to variations in soil type and climatic conditions. Between 28 000 and 46 000 ha per year is dedicated to rice production in Chile and profits depend on fertilization. A field experiment determine the effect of N rates and split N fertilization on grain yield and its components was carried out in two locations during two consecutive seasons (2007 to 2009), where five N rates and five split N fertilizations were evaluated. The locations were in Parral (36º2’ S; 72º08’ W, Vertisol) and San Carlos (36º19’ S; 71º59’ W, Inceptisol), with N rates of 80, 100, 120, 140, and 160 kg ha-1 applied in different...
Tipo: Journal article Palavras-chave: Irrigated rice; Nitrogen management; Rice productivity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000300015
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การวิเคราะห์ข้อมูลการถอดรหัส ที่ส่งผลต่อการแสดงออกของยีนที่แตกต่างกันในช่อดอกจากจีโนมข้าวลูกผสมและพันธุ์พ่อแม่ Thai Agricultural
Kulchana Ketsuwan.
Next Generation Sequencing (NGS): SOLiD System Sequencing Platform was applied to investigate the whole transcriptome of two hybrids (PTT06001H; H1 and PTT06008H: H2), two paternal lines (CK81; P1 and CK120; P2), and maternal line (IR79156; M). The data sets were aligned against the reference, precisely, the total numbers of the individual rice panicles sample aligned with Nipponbare ranking from the highest were as follows, P2 (9,747,077 reads), H1 (7,386,061 reads) , P1 (5,361,077 reads) , H2 (5,196,982 reads), and M (2,244,306 reads), respectively. The differentially expressed genes (DEGs) were identified and found that 2902, 1604, 3168, 3068, 1171, and 3031 genes were up-regulated (> 2 fold) between M vs. H1, P1 vs. H1, M vs.P1, M vs. H2, P2 vs. H2,...
Tipo: PhysicalObject Palavras-chave: Hybrid rice; Heterosis; Differentially expressed genes; DEGs; Genetic transformation; Gene expression; Transcription; Nucleotide analysis; Plant breeding; Rice productivity; ข้าว; พันธุ์ลูกผสม; ช่อดอก; การถ่ายทอดทางพันธุกรรม; การแสดงออกของยีน; การถอดรหัสพันธุกรรม; การวิเคราะห์นิวคลีโอไทด์; การปรับปรุงพันธุ์; ศักยภาพความดีเด่นเหนือพ่อแม่; การเพิ่มผลผลิต.
Ano: 2014 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5659
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วันนี้การปลูกข้าวเปลี่ยนไป Thai Agricultural
Parinya Chinnoros.
Tipo: Collection Palavras-chave: Rice productivity; Cultivation; Thai Rice Check System; Grain; Variety; ข้าว; การปลูกข้าว; การปลูกข้าวแบบบูรณาการ; เมล็ดพันธุ์ดี; การเพิ่มผลผลิต; เขตชลประทาน; พันธุ์ต้านทานโรค; พันธุ์ต้านทานแมลง; ข้่าวปลอดสารพิษ; การเก็บเกี่ยว.
Ano: 2005 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5291
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