Tạp chí
Ngô Ngọc Hưng (trang 52-56)
Từ khoá: ảnh hưởng, bón phân, urea, hoạt động, phiêu sinh thực vật, tảo, N, lúa, đất lúa
Summary
Effect of urea application on phytoplankton activity and nitrogen losses in rice field
Research was conducted on alluvial soil at Chau Thanh, Can Tho during wet season 2002. Biomass of phytoplankton reached maximum within 2-4 days after urea application. Biomass of phytoplankton at the CuSO4 treatment was lower than that of the control. Algaecides are suggested to test for reducing NH3 volatilization loss. The noticeable amount of ammoniacal-N can remain in floodwater within 6-7 days after fertilization. Consideration of the floodwater N concentration will greatly help minimize N losses by leaching or runoff from lowland rice soils.
