Nguyễn Ninh Phước, Cao Ngọc Điệp (trang 47-51, 61)
Từ khoá: ảnh hưởng, thuốc diệt cỏ, Rafele, Tiller’s, Cantanil, Satunil, hoạt động, sinh khối, vi sinh vật, đất phù sa, lúa, Đồng Tháp
Effect of four kinds of herbicides (Rafele, Tiller’s, Cantanil, Satunil) on rialluvil soils microbial activity and carbon nitrogen biomass in Dong Thap province
Field experiment in year 2000. It was arranged with a completely block randomized design with 4 replications and 5 treatments consist of 4 kinds of herbicides Rafele, Tiller’s, Cantanil, Satunil and weed-handle control. Results: 4 herbicides decreased bacterial, fungal, actinomycetal and algal propagule numbers and they also reduced soil microbial carbon-nitrogen biomass. Rafele and Tiller’s toxicity affected on bacterial and fungal propagule numbers seriously and their toxicity prolongation on soil microbial biomass during rice cultivation time; Cantanil had the lowest toxicity on microbial numbers and soil biomass.