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Registros recuperados: 9
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Comparison of foliar and soil nitrogen fertilizer management on growth, nitrogen use efficiency and yield of direct seeded rice International Rice Research Institute
Mnzava, Moses N. W..
131 leaves : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Nitrogen fertilizers; Fertilizer application; Foliar application; Plant growth; Nutrient use efficiency; Yields; Direct seeding; Rice; Plant physiology.
Ano: 1991 URL: http://hdl.handle.net/123456789/938
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Does nutrient cycling differ between fragments of Atlantic Forest with distinct structural aspects? A case study in the state of Rio de Janeiro, Brazil Acta Botanica
Cunha,Gláucio de Mello; Gama-Rodrigues,Antonio Carlos.
In this study, we evaluate litter biomass and nutrient inputs, as well as nutrient use efficiency (NUE), in two fragments of dense montane rain forest within the Atlantic Forest Biome in the northern region of the state of Rio de Janeiro, Brazil. The total annual average litter production for the two fragments (designated M1 and M2) was 7.72 and 7.56 t ha−¹ year−¹, respectively. The annual nutrient return rate was 146.67, 4.84, 21.41, 64.93, and 17.25 kg ha−¹ year−¹ for N, P, K, Ca, and Mg, respectively. No differences in NUE were observed between the studied fragments, except for that of P. The average NUE for N, P, K, Ca, and Mg, respectively, was 51, 1426, 367, 111, and 428 in fragment M1, compared with 51, 1890, 360, 126, and 472 in fragment M2. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decomposition; Forest fragment; Litter; Nutrient input; Nutrient use efficiency.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400015
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Effect of potassium fertilization on yield and nutrition of yerba mate (Ilex paraguariensis) Rev. Bras. Ciênc. Solo
Santin,Delmar; Benedetti,Eliziane Luiza; Barros,Nairam Félix de; Almeida,Igor Carvalho de; Leal,Greice Pereira; Fontes,Lucas; Neves,Júlio César Lima; Wendling,Ivar; Reissmann,Carlos Bruno.
Yerba mate (Ilex paraguariensis) is a tree species native to the subtropical regions of South America, and is found in Brazil predominantly in the southern region. Despite the historical importance in this region, so far, studies on crop nutrition to improve yields are scarce. Thus, this study evaluated the effect of potassium rates on K soil availability, and the yield and nutritional status of yerba mate. The experiment was conducted in São Mateus do Sul, State of Paraná, on a Humox soil, where K2O rates of 0, 20, 40, 80, 160, and 320 kg ha-1 were tested on 7-year-old plantations. The experiment was harvested 24 months after installation by removing approximately 95 % of the canopy that had sprouted from the previous harvest. The soil was evaluated for K...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil K availability; K mobility in the soil; Nutrient use efficiency; Nutritional status.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500012
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Effects of Transplanting Time on 15-Nitrogen Utilization and Industrial Quality of Flue-Cured Tobacco Rev. Bras. Ciênc. Solo
Xie,Zhijian; He,Yaqin; Xu,Changxu; Tu,Shuxin.
Abstract Nicotine concentration is a key index and directly affects the industrial quality and availability of flue-cured tobacco (FCT). Seedlings transplanted at different times were subjected to different climatic conditions, which were closely correlated with the growth, development, and nicotine synthesis of FCT. An appropriate transplanting time is imperative for ensuring high-quality tobaccos. Hence, a 15N tracing experiment in the field (which included three treatments: FCT seedlings transplanted on 5th, 15th, and 25th May) was carried out to evaluate the influence of different transplanting dates on 15N utilization and nicotine concentration in FCT leaves. Results showed that compared to the tobacco seedlings transplanted on 5th May, the seedlings...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cash crop; Agronomy measurement; Nicotine; Nutrient use efficiency; Isotope.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100534
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Nutritional Efficiency of Eucalyptus Clones Under Water Stress Rev. Bras. Ciênc. Solo
Müller,Caroline; Hodecker,Bárbara Elias Reis; Merchant,Andrew; Barros,Nairam Félix de.
Abstract Plant health and nutrition are strongly influenced by the availability of water. The objective of this study was to evaluate the different patterns of initial growth and nutritional efficiency of ten drought-stressed Eucalyptus clones. Water stress conditions were induced by osmotic stress, by gradual addition of polyethylene glycol 6000 over a 20-day period. Drought stress significantly reduced the dry matter of leaves, roots, and the whole plant as well as the nutritional efficiency of most clones. Clone PL040 was the least efficient in nutrient uptake and use and the most sensitive to drought stress. Interestingly, under drought stress, the drought-tolerant clones generally had high AE (absorption efficiency), but low nutrient UE (use...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tree; Growth; Nutrient use efficiency; Drought stress.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100531
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Phosphorus efficiency in rainfed lowland rice International Rice Research Institute
Huguenin-Elie, Olivier.
vi, 183 p. : ill. Thesis (Ph.D.) -- Swiss Federal Institute of Technology
Tipo: Thesis Palavras-chave: Rice; Phosphorus; Nutrient use efficiency; Dryland farming; Rainfed lowland rice.
Ano: 2001 URL: http://hdl.handle.net/123456789/476
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Productivity and resource-use efficiency of rice as affected by crop establishment and nitrogen management International Rice Research Institute
Ali, Md. A..
xx, 182 leaves : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños.
Tipo: Thesis Palavras-chave: Rice; Productivity; Nitrogen; Nutrient use efficiency; Plant establishment.
Ano: 2005 URL: http://hdl.handle.net/10269/171
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Screening criteria for evaluating efficiency of N use in rice and genetic background of rice-bacteria associated nitrogen fixation International Rice Research Institute
Ping, Wu.
104 leaves : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Plant genetics; Selection criteria; Genotype; Nitrogen; Nutrient use efficiency; Nitrogen fixation; Nitogen-fixing bacteria; Soil.
Ano: 1993 URL: http://hdl.handle.net/123456789/723
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Tree Growth and Nutrient Dynamics in Pine Plantations in Southern Brazil Rev. Bras. Ciênc. Solo
Barros Filho,Nairam Felix de; Schumacher,Mauro Valdir; Neves,Júlio César Lima; Barros,Nairam Felix de; Valadares,Samuel Vasconcelos.
ABSTRACT For the development of nutrient budget models to recommend lime and fertilizers for agricultural and forestry crops, curves of plant growth and nutrient accumulation are required. Information about how nutrients are partitioned between the different plant organs is also necessary, but still scarce for pine in Brazil. This study evaluated the growth, biomass partitioning, and nutrient dynamics in pine forests in southern Brazil. To this end, we assessed unthinned 2, 4, 6, and 8-year-old stands of Pinus taeda L. Three plots of 20 × 30 m per stand were delimited, in which three trees of different classes of diameter at breast height (DBH) were chosen. These trees were measured, felled, and the weight of their fresh components (leaves, branches, bark,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pinus taeda; Nutrient content; Nutrient partitioning; Nutrient use efficiency.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100536
Registros recuperados: 9
Primeira ... 1 ... Última
 

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