TY - JOUR
T1 - Flooding and its influence on diazotroph populations and soil nitrogen levels in the Okavango Delta.
AU - Omari, K.
AU - Mubyana, T.
AU - Matsheka, M.I.
AU - Bonyongo, M.C.
AU - Veenendaal, E.M.
PY - 2004
Y1 - 2004
N2 - Effects of flooding on soil nitrogen (N), and asymbiotic nitrogen fixing bacterial (diazotroph) populations of the Okavango Delta were investigated. Diazotrophs from the rhizosphere of dominant annual and perennial grasses of the Okavango Delta were isolated on N-free composite media and identified applying morphological and biochemical criteria and Restriction Fragment Length Polymorphism (RFLP). Azotobacter species were found associated mostly with the grasses Andropogon guyanus and Vetevaria nigritiana (103CFU g¿1 rhizosphere soil). Annual grasses such as Eragrostis inamoena, Setaria sphacelata as well as perennials showed insignificant populations (
AB - Effects of flooding on soil nitrogen (N), and asymbiotic nitrogen fixing bacterial (diazotroph) populations of the Okavango Delta were investigated. Diazotrophs from the rhizosphere of dominant annual and perennial grasses of the Okavango Delta were isolated on N-free composite media and identified applying morphological and biochemical criteria and Restriction Fragment Length Polymorphism (RFLP). Azotobacter species were found associated mostly with the grasses Andropogon guyanus and Vetevaria nigritiana (103CFU g¿1 rhizosphere soil). Annual grasses such as Eragrostis inamoena, Setaria sphacelata as well as perennials showed insignificant populations (
U2 - 10.1016/s0254-6299(15)30174-5
DO - 10.1016/s0254-6299(15)30174-5
M3 - Article
SN - 0254-6299
VL - 70
SP - 734
EP - 740
JO - South African Journal of Botany
JF - South African Journal of Botany
IS - 5
ER -