Tạp chí
Nguyễn Bảo Vệ, Lê Văn Quân (trang 115-119)
Từ khoá: khoáng hoá, đạm, ảnh hưởng, thuốc trừ sâu, thuốc diệt cỏ, đất, lúa, đất màu, đất lúa
Summary
Nitrogen mineralization capacity as influenced by insecticide, fungicide and herbicide on soils of rice and upland crop
Experiments in laboratory. Top soils of intensive 3 rice and upland crop in Tien Giang were collected, dried, and ground through 2mm sieve, then used as medium for N mineralization under aerobic incubations. Insecticide Monitor 70 DD, fungicide Anvil 5 SC and herbicide Sofit 300 ND were applied into soil samples at normal rate. Total mineralized N of rice soils is higher than soils of upland crop. However, percentage of mineralized N (on basis of total soil N), is lower and nitrification process occurs later in soil of rice compared with soils of upland crop. The insecticide Monitor lower down N mineralization process in soils of upland crop, but no effect on rice soils. The fungicides Anvil lower down N mineralization in a short period in soils of upland crop, but no effect on rice soils. The herbicide Sofit has no effect on both soils of rice and upland crop.
