Full TGIF Record # 4384
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Web URL(s):https://link.springer.com/content/pdf/10.1007%2FBF02376802.pdf
    Last checked: 09/19/2017
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Publication Type:
Author(s):Sørensen, L. H.
Author Affiliation:Agricultural Research Department, Risø National Laboratory, Roskilde, Denmark
Title:Mineralization of organically bound nitrogen in soil as influenced by plant growth and fertilization
Source:Plant and Soil. Vol. 65, No. 1, February 1982, p. 51-61.
# of Pages:11
Publishing Information:Dordrecht, Netherland: Martinus Nijhoff Publishers
Related Web URL:https://link.springer.com/article/10.1007%2FBF02376802
    Last checked: 09/19/2017
    Notes: Abstract only
Keywords:TIC Keywords: Lolium perenne; Trifolium pratense; Nutrient uptake; Nitrogen; Chemical transformation; Mineralization
Abstract/Contents:"A loam soil containing an organic fraction labelled with15N was used for pot experiments with spring barley, rye-grass and clover. The organically bound labelled N was mineralized at a rate corresponding to a half-life of about 9 years. Fertilization with 106 and 424 kgN/ha of unlabelled N in the form of KNO3 significantly increased uptake of labelled N from the soil in barley and the first harvest of rye-grass crops. The fertilized plants removed all the labelled NH4 and NO3 present in the soil, whereas the unfertilized plants removed only about 80%. The second, third and fourth harvests of the unfertilized rye-grass took up more labelled N than the fertilized rye-grass. The total uptake in the four harvests was similar whether the plants were fertilized or not. Application of KCl to barley plants in amounts equivalent to that of KNO3 resulted in a small but insignificant increase in uptake of labelled N. The uptake of labelled N in the first harvest of clover which was not fertilized but inoculated with Rhizobium was similar to that of the fully fertilized rye-grass indicating that the biological fixation of N had the same effect as addition of N-fertilizer. N uptake in the following harvests was lower and the total uptake by four harvests of clover was similar to that of rye-grass. There was no indication that fertilization with KNO3 accelerated the mineralization of the organically bound labelled N. The observed apparent priming effect of the fertilizer on the uptake of labelled N was compensated by subsequent crops and harvests, and it seems to arise from a more thorough search of the soil volume by a better developed root system of the fertilized plants."
Note:Summary appears as abstract
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sørensen, L. H. 1982. Mineralization of organically bound nitrogen in soil as influenced by plant growth and fertilization. Plant Soil. 65(1):p. 51-61.
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DOI: 10.1007/BF02376802
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    Last checked: 09/19/2017
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: SB 13 .P55
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