Trần Đức Toàn*, Nguyễn Văn Thiết*
* Viện Thổ nhưỡng Nông hoá Quốc gia
Từ khoá: khả năng, thấm nước, đất dốc, mưa, sử dụng đất, phương thức sử dụng
Impact of cultivation methods and rainfall intensity on infiltration capacity of sloping land
Results of experiment on the Dong Cao watershed: infiltration capacity of the soil is closely depended on rainfall intensity, the more rainfall intensity, the less water infiltration, because of surface soil compaction crust formation reduced infiltration rate. The least water infiltration rate is on the cassava cultivated area, where soil surface is disturbed, poor/no structure, easily crust formation. Eucalyptus cultivated area: water infiltration rate is also not much higher than on cassava area. Because under the Eucaliptus’s canopy, soil surface is bare and compact by the rain drops and water drops formed from the leaves falling down resulting in reducing infiltration rate. Fallow and fodder plantation areas are the best methods, they stimulating infiltration rate of the soil, resulting from covering density reducing surface runoff and promoting surface water infiltration.