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  • 1
    Electronic Resource
    Electronic Resource
    Nodulation and growth ofLeucaena leucocephala (Lam.) de Wit as affected by inoculation and N fertilizer (1988)
    Springer
    Plant and soil 112 (1988), S. 129-135 
    Details
    ISSN: 1573-5036
    Keywords: alfisol ; inoculation ; Leucaena leucocephala ; nitrogen fertilizer ; nitrogen fixation ; nodulation ; Rhizobium ; shoot growth ; total nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Leonard jar, pot and field experiments examined the effects of inoculation and the influence of nitrogen fertilizer on nodulation, nitrogen fixation and growth ofLeucaena leucocephala (Lam.) de Wit at IITA, Ibadan, Nigeria. Leucaena responded to both inoculation and/or nitrogen application. Shoot growth and total N and P of inoculated plants were comparable to those of the highest N treatment, and the values were about 55% greater than those of uninoculated ones. Field data indicated that toal N yields of inoculated leucaena were increased by 50% with 40 or 80 kg ha−1 of N fertilizer. However, N fertilizer depressed N fixation by 56% as was expected from nodule mass data. N-fixation was delayed for about 8 weeks in the plots without N. Application of small amounts of N starter (20 ppm) proved to be beneficial to satisfy the plant need during the early stage of leucaena growth. The rhizobial strains IRc 1045 and IRc 1050 were effective, competitive and survived well in the field one year after their establishment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181762
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen contribution of Leucaena/Rhizobium symbiosis to soil and a subsequent maize crop (1988)
    Springer
    Plant and soil 112 (1988), S. 137-141 
    Details
    ISSN: 1573-5036
    Keywords: alfisol ; egbeda series ; Leucaena leucocephala ; inoculation ; maize ; nitrogen contribution ; nodules ; Rhizobium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The nitrogen contribution from the shoot and root system of symbiotically grown leucaena was evaluated in a field experiment on an Alfisol at IITA in Southern Nigeria. Maize in plots that received prunings from inoculated leucaena contained more N and grain yield was increased by 1.9 t.ha.−1. Large quantities of nitrogen were harvested with leucaena prunings (300 kg N ha−1 in six months) but the efficiency of utilization of this nitrogen by maize was low compared to inorganic N fertilizer (ammonium sulphate) at 80 kg N ha−1. Maize yield data indicated that nitrogen in leucaena prunigs was 34 and 45% as efficient as 80 kg N ha−1 of (NH4)2SO4 for uninoculated and inoculated plants with Rhizobium IRc 1045, respectively. In plots where the prunings were removed, the leaf litter and decaying roots and nodules contributed N equivalent of 32 kg ha−1. Twenty-five kg ha−1 was the inorganic N equivalent from nitrogen fixed symbiotically by leucaena when inoculated with Rhizobium strain IRc 1045. Application of prunings from inoculated leucaena resulted in higher soil ogranic C, total N, pH and available NO3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181763
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Response of Leucaena/Rhizobium symbiosis to mineral nutrients in Southwestern Nigeria (1988)
    Springer
    Plant and soil 112 (1988), S. 121-127 
    Details
    ISSN: 1573-5036
    Keywords: alfisol ; allantoin ; inoculation ; Leucaena leucocephala ; mineral nutrition ; nodulation ; nitrogenase activity ; shoot growth ; total nitrogen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Pot and field experiments carried out at the International Institute of Tropical Agriculture (IITA) and at Fashola, Southwestern Nigeria, examined the effect of inoculation and N, P and micronutrients on nodulation and growth ofLeucaena leucocephala (Lam.) de Wit. In pot studies all parameters measured, except the percentage of nitrogen in shoots, were improved by inoculation, nitrogen and phosphorus. Micronutrients increased only nitrogen and allantoin contents. Interactions between inoculation and P, N and micronutrients on nodulation and growth of leucaena were observed. The effect of inoculation and fertilization with phosphorus or micronutrients was further investigated in field experiments. Establishment of uninoculated and unfertilized leucaena was poor at both locations due to low soil fertility and the presence of only a few native leucaena rhizobia. At one site, only inoculated plants were nodulated, while at the other, all plants produced nodules. Shoot dry weight, total nitrogen and phosphorus of inoculated plants were statistically equal to nitrogen-fertilized plants. Uninoculated plants were stunted. Generally, micronutrients did not influence nodulation, total nitrogen or growth of leucaena. They had only a positive effect on nitrogenase activity. Phosphorus increased total nitrogen and phosphorus uptake and plant growth. A 75% increase in shoot dry weight was obtained when 80 kg P ha−1 was applied to inoculated leucaena with Rhizobium strain IRc 1045. Inoculated plants contained more allantoins than uninoculated ones but no significant correlation was found between these compounds and other parameters of N fixation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181761
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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