Đặng Văn Minh (trang 6-9)
Từ khoá: cacbon hữu cơ, nitơ, đất, chè
Organic carbon and nitrogen dynamic in the soils under tea plantation
Soil OC and total N contents decreased in response to cultivation with lowest OC and N total content occurring in the 40-yr-old tea soils. The decrease in OC and total N was greatest during the 1st 10 years of cultivation, reaching state after 25 years of continuous tea production. Changes in OC and total N were mainly at surface 0-40cm layer, but in subsoil layers (40-80cm depth) there were exhibited no significant change during 40 years of tea cultivation. The decrease in OC resulted in increasing bulk density, decreasing mean weight diameter, plant available water capacity, and CEC.