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  • 1995-1999  (6)
  • Added nitrogen interaction  (2)
  • Diazotrophic bacteria  (2)
  • N fertilizers  (2)
Datenquelle
Materialart
Erscheinungszeitraum
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Mineralization of soil organic nitrogen solubilized by aqua ammonia fertilizer (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 93-98 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Added nitrogen interaction ; Alkaline-hydrolysing fertilizer ; Aqua ammonia ; Gross N immobilization ; Gross N mineralization ; 15N ; Soluble organic N availability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Organic N solubilized by NH3(aq) was extracted from 15N-labelled or unlabelled soil, concentrated and added to non-extracted soil, which was incubated under aerobic conditions at 27±1°C. Gross N mineralization, gross N immobilization, and nitrification in soils with or without addition of unlabelled soluble organic N were estimated by models based on the dilution of the NH 4 + or NO inf3 sup- pools, which were labelled with 15N at the beginning of incubation. Mineralization of labelled organic N was measured by the appearance of label in the mineral N pool. Although gross N mineralization and gross N immobilization were increased in two soils between day 0 and day 7 following addition of unlabelled organic N solubilized by NH3(aq), there was no increase in net N mineralization. Solubilization of 15N-labelled organic N increased and the 15N enrichment of the soluble organic N decereased as the concentration of NH3(aq) added increased. A constant proportion of approximately one-quarter of the labelled organic N added at different rates to non-extracted soil was recovered in the mineral N pool after an incubation period of 14 days, and the availability ratios calculated from net N mineralization data were 1.1:1 and 2.1:1 for 111 and 186 mg added organic-N kg-1 soil, respectively, indicating that the mineralization of organic N was increased by solubilization.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00335824
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Amelioration of water stress effects on wetland rice by urea-N, plant growth regulators, and foliar spray of a diazotrophic bacterium Klebsiella sp. (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 454-458 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Key words Water stress effects ; Urea N ; Diazotrophic bacteria ; Plant growth regulators ; Wetland rice ; Oryza sativa L. ; Klebsiella sp. strain ; CO2 exchange ; Na content
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Some of the measures suggested for amelioration of drought effects include application of N fertilizer and plant growth regulators (PGRs). Since N2-fixing bacteria produce plant growth substances (PGRs), the effect of foliar application of an active strain of Klebsiella sp. (KUPOS) on IR-50 rice was examined using three foliar sprays applied at 10-day intervals. Irrigation once every 3 days was essential for plant growth. Application of KUPOS and 40 kg N ha–1 improved grain yield of acutely water stressed plants from 330 kgha–1 to more than 1300 kgha–1 along with an improvement in several growth variables and yield determinants. Indole acetic acid, kinetin and GA3, in a mixture of 10–4 M of each, were less effective than KUPOS in alleviating stress effects. The adverse effects of water stress on respiration and photosynthesis as indicated by CO2 exchange were also alleviated by these treatments. While uptake of K, Mg, Ca, Fe and Mo was increased, Na content decreased, accompanied by an increase in proline content. The order of effectiveness of the treatments was 40 kg N ha–1 〉KUPOS〉PGRs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00335922
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Amelioration of water stress effects on wetland rice by urea-N, plant growth regulators, and foliar spray of a diazotrophic bacterium Klebsiella sp. (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 454-458 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Water stress effects ; Urea N ; Diazotrophic bacteria ; Plant growth regulators ; Wetland rice ; Oryza sativa L. ; Klebsiella sp. strain ; CO2 exchange ; Na content
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Some of the measures suggested for amelioration of drought effects include application of N fertilizer and plant growth regulators (PGRs). Since N2-fixing bacteria produce plant growth substances (PGRs), the effect of foliar application of an active strain of Klebsiella sp. (KUPOS) on IR-50 rice was examined using three foliar sprays applied at 10-day intervals. Irrigation once every 3 days was essential for plant growth. Application of KUPOS and 40 kg N ha-1 improved grain yield of acutely water stressed plants from 330 kg ha-1 to more than 1300 kg ha-1 along with an improvement in several growth variables and yield determinants. Indole acetic acid, kinetin and GA3, in a mixture of 10-4 M of each, were less effective than KUPOS in alleviating stress effects. The adverse effects of water stress on respiration and photosynthesis as indicated by CO2 exchange were also alleviated by these treatments. While uptake of K, Mg, Ca, Fe and Mo was increased, Na content decreased, accompanied by an increase in proline content. The order of effectiveness of the treatments was 40 kg N ha-1 〉KUPOS〉PGRs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00335922
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Biological interactions between soil nitrogen and alkaline-hydrolysing nitrogen fertilizers (1995)
    Springer
    Biology and fertility of soils 20 (1995), S. 41-48 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Added nitrogen interaction ; Ammonia fixation ; 15N ; Immobilization ; Fertilizer-induced solubilization
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Added N interactions were measured in four soil incubated with 15N-labelled urea or diammonium phosphate. The use of biologically active, γ-irradiated, or reinoculated γ-irradiated samples allowed us to separate added N interactions due to chemical and biological processes, and to distinguish real interactions from apparent effects. Real biologically mediated added N interactions were observed in one soil for both fertilizer sources and in three soils amended with urea. These real interactions increased with the N fertilizer rate, but did not differ significantly between N sources. Fertilizer-induced unlabelled organic N in soil extracts declined during incubation in both sterile and non-sterile samples, but the temporal decline was higher in biologically active soil. Changes in fertilizer-induced unlabelled organic N in the extracts of three soils attributed to biological processes were similar to the measured real biologically mediated added N interactions. The results are consistent with the hypothesis that real biologically mediated added N interactions arise from the mineralization of soil organic N solubilized by alkaline-hydrolysing N fertilizers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00307839
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Effects of inorganic fertilizers and micronutrients on methane production from wetland rice (Oryza sativa L.) (1996)
    Springer
    Biology and fertility of soils 21 (1996), S. 319-322 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Key words Methane production ; N fertilizers ; Micronutrients ; Wetland rice
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract We compared the effects of adding different forms of nitrogenous fertilizers on the production of CH4 in soil and on CH4 emission from rice plants, Urea and diammonium phosphate gave the highest rates of CH4 production from the soil and emission through rice plants, followed by (NH4)2SO4. NaNO3 was the least effective. The effects of micronutrients like Mo, Ni, or B were more prominent than those of Fe, Mn, Zn, V, or Co. It is concluded that CH4 emission from rice paddies is influenced by both macro- and micronutrients, through effects on both microbial methanogenesis in soil and elimination through rice plants as a consequence of the effects on plant growth.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00334910
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Effects of inorganic fertilizers and micronutrients on methane production from wetland rice (Oryza sativa L.) (1996)
    Springer
    Biology and fertility of soils 21 (1996), S. 319-322 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Methane production ; N fertilizers ; Micronutrients ; Wetland rice
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract We compared the effects of adding different forms of nitrogenous fertilizers on the production of CH4 in soil and on CH4 emission from rice plants, Urea and diammonium phosphate gave the highest rates of CH4 production from the soil and emission through rice plants, followed by (NH4)2SO4. NaNO3 was the least effective. The effects of micronutrients like Mo, Ni, or B were more prominent than those of Fe, Mn, Zn, V, or Co. It is concluded that CH4 emission from rice paddies is influenced by both macro- and micronutrients, through effects on both microbial methanogenesis in soil and elimination through rice plants as a consequence of the effects on plant growth.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00334910
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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