TY  - GEN
T1  - Effects of fertilisation on soil niutrient characteristics and the growth of tree stand in secondary seasonally dry tropical forests in Mexico
A1  - Campo, J.
LA  - English
YR  - 2017
UL  - http://discoverylib.upm.edu.my/discovery/Record/oai:http:--agris.upm.edu.my:0-13000
AB  - Soil properties and stem growth were studied in dominant tree species in secondary tropical dry forests growing on limestone in Yucatán Peninsula, México. A young forest (10 years old, site A) with phosphorus (P)-poor soil and an older forest (60 years old, site B) with soil having higher available P contents were selected. Tree growth of representative
species of each site was studied in relation to soil nitrogen (N) and P concentrations. Four independent
plots (12 m × 12 m) in each forest were either left intact (controls) or fertilised with N, P or with N + P for
three years. In the young forest soil concentrations of NO
3
-
were higher than those of NH
4
+
, indicating that
nitrification proceeded fast. Application of N and N + P increased the concentration of soil NO
3
-
at site A;
fertilisation treatments at this site increased trunk growth only in
Lysiloma latisiliquum
. In contrast, N or P
fertilisation at site B did not significantly affect soil extractable N concentrations. At this site, fertilisation
increased N transformations and P addition promoted growth in
Acacia gaumeri and Bursera simaruba. These findings indicated that nutrient limitation occurred in the secondary fores
KW  - Fertilization
KW  - Soil nutrient content
KW  - Tropical forests
KW  - Calcareous soils
KW  - Stems
ER  -