Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Kallar grass  (2)
  • 15N  (1)
  • 15N Oryza sativa  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Availability of soil and fertilizer nitrogen to wheat (Triticum aestivum L.) following rice-straw amendment (1990)
    Springer
    Biology and fertility of soils 10 (1990), S. 134-138 
    Details
    ISSN: 1432-0789
    Keywords: 15N ; N immobilization ; N loss ; N uptake ; Rice straw ; Soil N ; Wheat ; Triticum aestivum L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A pot experiment was conducted to study the N availability to wheat and the loss of 15N-labelled fertilizer N as affected by the rate of rice-straw applied. The availability of soil N was also studied. The straw was incorporated in the soil 2 or 4 weeks before a sowing of wheat and allowed to decompose at a moisture content of 60% or 200% of the water-holding capacity. The wheat plants were harvested at maturity and the roots, straw, and grains were analysed for total N and 15N. The soil was analysed for total N and 15N after the harvest to determine the recovery of fertilizer N in the soil-plant system and assess its loss. The dry matter and N yields of wheat were significantly retarded in the soil amended with rice straw. The availability of soil N to wheat was significantly reduced due to the straw application, particularly at high moisture levels during pre-incubation, and was assumed to cause a reduction in the dry matter and N yields of wheat. A significant correlation (r=0.89) was observed between the uptake of soil N and the dry matter yield of wheat with different treatments. In unamended soil 31.44% of the fertilizer N was taken up by the wheat plants while 41.08% of fertilizer N was lost. The plant recovery of fertilizer N from the amended soil averaged 30.78% and the losses averaged 45.55%
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336249
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Relative significance of soil and nitrogenous fertilizer in nitrogen nutrition and growth of wetland rice (Oryza sativa L.) (1991)
    Springer
    Biology and fertility of soils 11 (1991), S. 57-61 
    Details
    ISSN: 1432-0789
    Keywords: Added N interaction ; Fertilizer N ; 15N Oryza sativa ; Soil N ; Wetland rice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A pot experiment was conducted to compare the yields from five commercially cultivated varieties (Bas-198, Bas-370, Bas-Pak, Bas-385, and IR-6) of rice (Oryza sativa L.) and to establish the relative significance of soil N and fertilizer N (15N-labelled ammonium sulphate) in affecting crop performance. Another aim was to study the interaction of fertilizer N and soil N as influenced by different rice varieties. Among the five varieties tested, Bas-Pak gave the maximum dry matter and N yield. The N-use efficiency (percentage of applied N taken up by the plants) of different varieties ranged between 33.7 and 43.7%, Bas-Pak being the most efficient. Significant losses of fertilizer N occurred from the soil-plant system. The maximum N loss (52.1% of applied N) was observed with IR-6 and the minimum loss (39.2%) with Bas-Pak. A substantial increase in the uptake of soil N following the application of fertilizer and an interaction between the two N sources were observed with all varieties except Bas-385. The interaction was attributed to greater root proliferation following the application of fertilizer. It was concluded that a varietey with greater potential to use soil N is likely to give a better yield and that, of the two N sources, the availability of soil N was more important in determining the yield performance of different varieties of rice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335836
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Quantification of N2-fixation and survival of inoculated diazotrophs associated with roots of Kallar grass (1988)
    Springer
    Plant and soil 108 (1988), S. 43-51 
    Details
    ISSN: 1573-5036
    Keywords: Kallar grass ; 15N isotopic dilution ; N2 fixation ; saline soils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Experiments to determine the contribution of biological nitrogen fixation associated with roots of Kallar grass have been carried out both in pot and field using15N isotopic dilution method. In the absence of any appropriate reference plant, the uninoculated treatment was used as a control in the pot experiment. It was found that as a result of inoculation withKlebsiella sp. (NIAB-I) andBeijerinckia sp (Iso-2) 20–26% of the N in the plant was derived from the atmosphere. In the field experiment, a treatment receiving higher application of nitrogenous fertilizer to inhibit nitrogenase activity was kept as a control. Kallar grass was grown in 1 m2 microplots for 9 months and harvested thrice. The estimation of N fixed was made by calculating the ‘A’ value for different treatments at each harvest. It was found that the rate of N fixation increased with the plant growth. At the 2nd harvest, which was after monsoon, it was estimated that 32 kg N ha−1 was fixed. The survival of inoculated bacteria was also studied using fluorescent antibodies prepared against the inoculated bacterium. Survival and proliferation of these bacteria were found only where Kallar grass was growing, thus indicating a beneficial influence of the plant on bacterial growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370098
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Associative N2-fixation in plants growing in saline sodic soils and its relative quantification based on15N natural abundance (1991)
    Springer
    Plant and soil 137 (1991), S. 67-74 
    Details
    ISSN: 1573-5036
    Keywords: Atriplex ; Azospirillum ; biological nitrogen fixation ; 13C ; Cynodon ; Desmostachya ; Enterobacter ; Kallar grass ; Kochia ; Klebsiella ; 15N natural abundance ; Polypogon ; saline soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Saline-sodie soils are characterized by a very low nitrogen and organic matter content and thus are practically non fertile. However under these conditions, certain plants have been found to grow luxuriantly. One of such plants,Leptochloa fusca (Kallar grass) has exhibited nitrogenase activity associated with its roots as determined by acetylene reduction assay (ARA). Quantification of such nitrogen fixation was also carried out using15N isotope dilution technique. In addition to Kallar grass, other plant species growing in saline sodic soils namelyAtriplex amnicola, A. lentiformis, Sporobolus sp.,Kochia indica, Desmostachya bipinnata, Cynodon dactylon, Suaeda fruiticosa andPolypogon monspilensis have been screened for the presence of root associated nitrogenase activity. Some of the plant species tested showed high excised root acetylene reduction activity (ERARA). Isolation of diazotrophs from various fractions of the rhizosphere has also been carried out.Azospirillum was the dominant organism in niches closer to the roots, whereas there was a preponderance of the members of the family Enterobacteriaceae in general. In order to have a relative estimate of the nitrogen fixing ability of different plant species screened, the delta15N values of plant tops were estimated and were correlated with their ARA values. The delta13C values of these plants were also determined which indicated that all the plants tested exceptP. monspilensis had the C-4 photosynthetic pathway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187434
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...