Changes of soil properties induced by Rubber (Hevea brasiliensis) plantation establishment: A case study in Huong Khe, Ha Tinh, Vietnam
Keywords:
Soil, soil degradation, soil properties, sloping soil, ruberAbstract
Rubber plantation establishment on sloping areas can cause land
degradation due to low ground cover, especially in the site preparation and
young plantation stages. We exanimated whether soils under a rubber
plantation were degraded and what are the factors causing the change in soil properties. The results showed a great decrease of CEC, OC, TN, TP and
TK for the first 2 years, especially on highly slope area. However, there was
a trend of restoring these soil properties since year 2 onward but it was
slow. The value of pH, BS,4NH, available phosphate and available
potassium has increased strongly in first 2 years but the increases were not
stable. They decreased slightly on 2 - 6 year period. The potential
degradation of soil in pH, BS,4NH , available phosphate and K-a are
foreseeable in continuing years, especially on the latex tapping periods. The
negative influences on soil properties were due to slash and burn, unsuitable fertilizer regime, high rainfall and steep slope. Slash and burn should not be applied on sloping areas, especially on lager slope 25o
areas. More efficientfertilizer regime for sloping land which either meets nutrient demands of trees or compensates lost nutrient by leaching and erosion could be good solutions to develop rubber plantation sustainably on sloping land
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