Resultados de búsqueda - "field experiment"

Improving the estimation and partitioning of plant nitrogen in the RiceGrow model por Tang, L., Chang, R.J., Basso, B., Li, T., Zhen, F.X., Liu, L.L., Cao, W.X., Zhu, Y.

“…Calibration and validation of the established model were performed on field experiments conducted in China and the Philippines with varied N rates and N split applications; results showed that this improved model can simulate the processes of N uptake and translocation well.…”
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Soil CO2 venting as one of the mechanisms for tolerance of Zn deficiency by rice in flooded soils por Affholder, Marie-Cecile, Weiss, Dominik J., Wissuwa, Matthias, Johnson-Beebout, Sarah E., Kirk, Guy J.D.

“…We sought to explain rice (Oryza sativa) genotype differences in tolerance of zinc (Zn) deficiency in flooded paddy soils and the counter‐intuitive observation, made in earlier field experiments, that Zn uptake per plant increases with increasing planting density. …”
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Canopy architecture and leaf nitrogen distribution of rice (Oryza sativa L.) under chronic soil water deficit por Okami, M., Kato, Y., Yamagishi, J.

“…In this study, we aimed to clarify the effect of chronic soil water deficit on the SLN gradient in rice. In a series of field experiments, SLN gradients of an indica cultivar and a tropical japonica cultivar were investigated under chronic soil water deficit. …”
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Improving crop competitive ability using allelopathy- an example from rice por Olofsdotter, M., Jensen, L.B., Courtois, B.

“…Laboratory, greenhouse and field screenings for allelopathy and overall weed suppression in rice have been made and allelopathic rice germplasm has been identified in laboratory and greenhouse screening. Field experiments revealed that allelopathy accounted for 34% of overall competitive ability in rice. …”
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Rice--a step toward use of allelopathy por Olofsdotter, Maria

“…This paper aims to do so primarily using the following five‐step protocol for allelopathy research: (i) carrying out laboratory, greenhouse, and field studies to illustrate the effect of released allelochemicals; (ii) isolating, identifying, and characterizing allelochemicals; (iii) establishing a correlation between growth inhibition and allelochemicals; (iv) performing genetic mapping of quantitative trait loci (QTLs) correlated with allelopathy; and (v) breeding for allelopathic cultivars tested for competitive ability in greenhouse and field experiments. Recent research on rice allelopathy has resulted in the following research milestones: There is large variation in allelopathy among rice cultivars.Allelopathy plays a role under field conditions.Allelopathic rice can suppress both mono‐ and dicot weed species.Progress has been made in identifying rice allelochemicals.Quantitative trait loci correlated with allelopathy have been identified.There is large variation in allelopathy among rice cultivars.Allelopathy plays a role under field conditions.Allelopathic rice can suppress both mono‐ and dicot weed species.Progress has been made in identifying rice allelochemicals.Quantitative trait loci correlated with allelopathy have been identified.This paper discusses the progress made in recent years and suggests some direction for future research.…”
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Supplemental ultraviolet-B radiation does not reduce growth or grain yield in rice por Dai, Qiujie, Peng, Shaobing, Chavez, Arlene Q., Miranda, Ma. Lourdes L., Vergara, Benito S., Olszyk, David M.

“…To address the response of rice to UV‐B, we conducted an intensive and extensive series of field experiments from 1992 to 1995 documenting the effects of supplemental UV‐B (simulating approximately 20% ozone depletion for the Philippines), using irrigated rice cultivars under tropical conditions. …”
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Soybean seed quality in relation to days between development stages por Vaughan, Duncan A., Bernard, R.L., Sinclair, J.B.

“…The objectives of this study were to: (i) measure seed quality in genetically similar germplasm, but which differ in date of maturity, and (ii) to determine the effects of different reproductive growth periods on seed quality. The field experiments were conducted on Brenton (fine‐silty, mixed, mesic Aquic Argiudolls), Flanagan (fine, montmorillonitic, mesic Aquic Argiudolls) or Proctor (fine‐silty, mixed, mesic Typic Argiudolls) soils at the Agronomy‐Plant Pathology Farm, Univ. of Illinois at Urbana‐Champaign. …”
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Measurement of Nitrogen Utilization Efficiency in Rice Genotypes por Broadbent, F.E., De Datta, S.K., Laureles, E.V.

“…Our research attempted to identify traits associated with rice (Oryza sativa L.) genotypes that support maximum grain production with a minimum input of fertilizer. From field experiments on an Andaqueptic Haplaquoll in three consecutive seasons we identified a group of plant parameters associated with efficiency of N utilization to determine if the different genotypes exhibited consistent and significant variations in these parameters. …”
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Soil and water management for rice production in Nigeria por Olaleye, A. O., Osiname, O. A., Cofie, Olufunke O.

“…Much emphasis has been placed on the chemical properties of soils on which rice is grown while there is sparse information on the effect of soil physical properties on grain yield of rice. Field experiments were conducted on upland and wetland soils as they relate to water management for rice production in Nigeria. …”
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Evidence and policy implications of climate-smart agriculture in Kenya por Chesterman, Sabrina, Neely, Constance

“…The process engaged stakeholders from research, practice and policy and to interactively share and analyze scientific evidence and field experience from over 40 projects related to climate-smart agriculture (CSA) within integrated farming systems in Kenya. …”
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Simulation and prediction of soybean growth and development under field conditions por Zhang, L., Zhang, J., Kyei-Boahen, S., Zhang, M.

“…This study tried to simulate and predict soybean phenological growth using calendar-day based approach. Field experiments were conducted at the Delta Research and Extension Center, Stoneville, Mississippi, USA. …”
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Screenhouse and field persistence of nonpathogenic endophytic Fusarium oxysporum in Musa tissue culture plants por Paparu, P., Dubois, T., Gold, Cliford S., Niere, B., Adipala, E., Coyne, Danny L.

“…We conducted screenhouse and field experiments to investigate persistence in the roots and rhizome of two endophytic Fusarium oxysporum strains, V2w2 and III4w1, inoculated into tissue-culture banana plantlets of highland cooking banana cultivars Kibuzi and Nabusa. …”
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Efficacy of Bacillus thuringiensis (Berliner) in controlling the tomato borer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) por González-Cabrera, Joel, Mollá-Hernández, Óscar, Montón, Helga, Urbaneja, Alberto

“…The laboratory, greenhouse, and open-field experiments presented in this work are evidence that B. thuringiensis is highly efficient in controlling T. absoluta. …”
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Influence of plant density and growth habit of common bean on leaf area development and N accumulation por Clavijo Michelangeli, José A., Ricaurte Oyola, José Jaumer, Sinclair, Thomas R., Rao, Idupulapati M., Beebe, Stephen E.

“…For common bean (Phaseolus vulgaris L.), resolution of the basic characteristics limiting production is challenging because of variation in plant growth-habit and in wide-ranging plant spacing. Field experiments were undertaken at two low-latitude locations with three plant growth-habit types and six plant densities to measure canopy leaf area and leaf N accumulation at the beginning of seed fill. …”
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Shade tree species matter: sustainable cocoa-agroforestry management por Asitoakor, B.K., Rabild, A., Vaast, P., Ravn, H.P., Owusu, K., Mensah, E.O., Asare, R.

“…Based on a review of the existing literature and on primary data from field experiments, this chapter reports on the species-specific effects of shade trees in relation to the management of insect pests, black pod diseases and their impacts on cocoa yield. …”
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Rising atmospheric carbon dioxide concentrations increase gaps of rice yields between low- and middle-to-high-income countries por Song, Lian, Tao, Ye, van Groenigen, Kees Jan, Chang, Scott X., Peñuelas, Josep, Zhang, Jishuang, You, Liangzhi, Cai, Chuang, Wang, Songhan, Jiang, Yu, Ma, Chuanqi, Yan, Xiaoyuan, Ni, Kang, Wang, Dongming, Wang, Yu, Zhu, Chunwu

“…Here we conducted a meta-analysis of rising carbon dioxide field experiments and employed crop modelling to assess future global rice yields for the top 14 rice producing countries. …”
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Rainwater harvesting for supplemental irrigation of onions in the southern dry lands of Ethiopia por Assefa, S., Biazin, B., Muluneh, A., Yimer, F., Haileslassie, Amare

“…We examine the agro-meteorological risks such as late onset, early cessation, overall low rainfall amounts and long dry spells during the growing season and evaluate the potential of macro-catchment RWH for supplemental irrigation of onion in the southern dry lands of Ethiopia. Field experiments were undertaken during 2012 and 2013 to evaluate the effects of 50% ETc, 75% ETc and 100% ETc irrigation levels on yield and water productivity of onion during dry and wet seasons. …”
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Enhancing farmer's participation in plant breeding: Community Biodiversity Development and Conservation Program (CBDC), Bohol project, Philippines por Ramos, Hidelisa M. de

“…Workshops were conducted every season to identify researchable areas and to design field experiments. Community workshops were also held lo analyze research results and identify new problems for the next season. …”
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Preliminary report of the toxicity of Lippia junelliana (Lamiales: Verbenaceae) and Elionorus muticus (Poales: Poaceae) on Apis mellifera (Hymenoptera: Apidae) por Vega, Maricel, Reynaldi, Francisco J., Altamirano, Rodrigo, Salina, Marcos D., Juarez, Miguel Angel, Albo, Graciela N.

“…Our results allow us to propose the use of L. junelliana essential oil in field experiments of A. mellifera hives.…”
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Åkerböna i samodling med vårvete som helgrödesensilage till mjölkkor por Haag, Therese

“…Considering the DM yield in the field experiments the field bean/spring wheat crop should be harvested when the pods are full sized and in the pod fill stage (development stage 79 according to Zadoks et al. [1974]). …”