dc.contributor.author | Mwendwa, KA | |
dc.contributor.author | Karanja, NK | |
dc.contributor.author | Zapata, F | |
dc.date.accessioned | 2013-07-25T08:34:53Z | |
dc.date.available | 2013-07-25T08:34:53Z | |
dc.date.issued | 1999 | |
dc.identifier.citation | " BIOTECHNOLOGIE AGRONOMIE SOCIETE ET ENVIRONMENT 3 (1999): 57-64. | en |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/51032 | |
dc.description.abstract | Three experiments were conducted to assess the response of
G. robusta
to phosphorus fertilization using acid soils showing
low P
levels from Eastern (Gituamba-Andosols) and
W
estern (Kakamega-Acrisols) Kenya. In the first experiment P
was
applied as Minjingu phosphate rock (MPR-13%P) at 0, 52 and 77 kg P
per ha into 5
kg of soil. In the second experiment 2
g
vesicular arbuscular mycorrhizae (VAM) soil + root inoculum per 5
kg soil was included in addition to the same MPR rates
using Kakamega soil only. In the third experiment, MPR and triple superphosphate (TSP) were added to 5
kg Kakamega soil
at a rate of 25.8
mg P
per kgsoil, and
32
P
isotope dilution techniques were used to assess P
uptake in the shoot harvested at
3 and 6 MA
T
(months after transplanting). Application of MPR to the Andosol reduced height and root collar diameter of
G.
r
obusta
significantly (p <
.05) as compared to the control. Significant increases (p
<
.05) in height and root collar diameter
where P
was added compared to control were recorded with the Acrisol. Soil interaction with P
fertilizer rates was highly
significant (p
<
.001) for both height and root collar diameter growth. The roots were not infected with
V
AM upon harvesting
at 12 months. At 3 MA
T
the percentage P
derived from the MPR and TSP
was 3% and 6% respectively. P
uptake decreased
significantly (p
<
.05) between 3 and 6 months. The results indicated that addition of Pfertilizer in the Acrisols was probably
required at the early stages of
G. robusta
growth but further research and particularly root studies are required to ascertain
the above observations | en |
dc.language.iso | en | en |
dc.publisher | University of Nairobi, | en |
dc.subject | Acrisols | en |
dc.subject | Andosols | en |
dc.subject | phosphate rock | en |
dc.subject | P update | en |
dc.subject | P isitope dilution technique | en |
dc.subject | triple super phosphate | en |
dc.subject | arbuscular mycorrhiza | en |
dc.subject | Grevillea robusta | en |
dc.subject | seedlings | en |
dc.subject | growth. | en |
dc.title | Growth response of Grevillea robusta A. Cunn. seedlings to phosphorus fertilization in acid soils from Kenya | en |
dc.type | Article | en |
local.publisher | college of agriculture and veterinary sciences, | en |