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The pyruvate kinase (PK) and ATPase activities taking part in nitrogen (N) assimilation is essential for the growth and development of plants. Studies on the kinetics of these enzymes reveal that its activities are dependent of the cofactors K+, Ca2+, and Mg2+. Therefore, the objective of the present work was to determine the effect of different doses of N on enzymatic activities of ATPase and ...

SUBJECT: nitrogen fertilizers; calcio; potassium; aplicacion de abonos; application rates

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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Counteracting the negative effects of drought in vegetal production should include drought monitoring, determination of drought tolerance and, thus, the assessment of risk, limitations and losses of yield for various species of cultivated plants. The aim of the work was to assess temporal and spatial variability of the occurrence of atmospheric drought in Poland and to determine the risk of cu ...

SUBJECT: resistencia a la sequia; necesidades de agua; poland; rendement des cultures; plant water relations

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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Growing influence of anthropopressure and irregular changes in weather conditions necessitated conducting agroclimatic research into the assessment of plant cultivation risk caused by unfavourable meteorological conditions, including thermal conditions of air. The goal of the work was to assess the risk of pickling cucumber field cultivation in Poland caused by an unfavorable course of air tem ...

SUBJECT: poland; cambio climatico; rendement des cultures; climatic change; air temperature

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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Characterization and use of a vegetable waste vermicompost as an alternative component in substrates for horticultural seedbeds

Melgar Ramírez, R., Centro de Investigación y Formación Agraria y Pesquera La Mojonera-La Cañada, El Ejido et al. [dic2010]

This experiment was designed to characterize the physical and chemical properties of six crop's media obtained by mixing different percentages (v/v) of peat, perlite, coconut coir dust, and vermicompost (end-product of the breakdown of organic matter of crop residues mixed with re-used coconut coir dust by Eisenia fetida) and to evaluate the tomato (Solanum lycopersicum cv. cumquat) seedling g ...

SUBJECT: substratos de cultivo; eisenia foetida; chemicophysical properties; seedbeds; compost

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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Determination of mineral elements in fresh olive fruits by flame atomic spectrometry

Fernández Hernández, A., Centro de Investigación y Formación Agraria de Jaén Venta del Llano et al. [dic2010]

The mineral element characterisation of olive fruits is acquiring interest to evaluate the link between their nutritional status and the olive oil quality. A method for the analysis of mineral elements in fresh olive fruits is proposed. The presence of mineral elements such as potassium, sodium, calcium, magnesium, zinc, copper, iron, and manganese in olive fruits was quantified by flame atomi ...

SUBJECT: nutritional status; huile dolive; atomic absorption spectrometry; olea europaea; spectrometrie dabsorption atomique

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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This paper presents the application of a new methodology for the analysis and appraisal of capitals available in rural community farming systems in research, technological development and innovation (R&D&Ti) projects. The methodology is based on participatory processes in the appraisal of capitals and includes the following: a) analysis of objectives and classification by capital; b) design of ...

SUBJECT: developpement socioeconomique; investigacion; capital; rural communities; pobreza

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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Soybean (Glycine max L.) crops were grown in 2003 and 2004 to determine effect of different water stress levels on growth, some physiological variables and seed composition under semi-arid climatic conditions of Harran plain, Sanlýurfa, Turkey. Irrigation water treatments included 0 (I0), 25 (I25), 50 (I50), 75 (I75), and 100% (I100) of full irrigation amounts with a 4 day irrigation interval. ...

SUBJECT: seed; semiarid climate; growth rate; teneur en proteines; indice de crecimiento

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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The 3,4-dimethyilpyirazole phosphate (DMPP), commercialized as Entec, is a nitrification inhibitor developed by BASF (Germany) that may help to minimize N losses and to obtain a higher profit from N fertilizers. A two-year field trial was established in 2001 in the Northeast of Spain to assess the effects of DMPP on N use efficiency (NUE) and to determine the economic returns. Seven treatments ...

SUBJECT: triticum aestivum; nitrogen fertilizers; sulfate dammonium; inhibiteur de nitrification; aplicacion de abonos

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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This work assessed the seasonal dynamics of the substrate oxygen content and the response to oxygen enrichment of nutrient solution (oxyfertigation) of autumn-winter sweet pepper and spring melon crops grown on rockwool slabs (2003/04 season) and perlite grow-bags (2004/05), compared to non-enriched crops. Dissolved Oxygen (DO) values in the nutrient solution were higher for all the oxygen enr ...

SUBJECT: dissolved oxygen; substratos de cultivo; irrigation fertilisante; perlite; nutrient solutions

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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The impact, on nitrogen and phosphorous dynamics, of applying compost at different rates was investigated in soils developed on schist in new terraced vineyards (NTV) and in undisturbed areas (NC). Repacked soil columns amended with 0 (control), 50 t/ha (T1) and 100 t/ha (T2) of compost were studied under laboratory conditions simulating both situations. The columns were maintained for 1 year, ...

SUBJECT: spain; compost; aplicacion de abonos; soil organic matter; fertilizer application

POSTED TO: Spanish Journal of Agricultural Research (España) [1695-971X]

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