Lê Hồng Lịch, Bùi Tuấn, Võ Thị Kim Oanh (trang 41-44)
Từ khoá: hiệu lực, phân lân, lạc, đất bazan, Tây Nguyên
The effects and residual effects of phosphorus fertilizers for peanut grown on rhodic ferralsols
On rhodic ferralsols, the effects and residual effects of fused magnesium phosphate (FMP) for peanut were higher than those of superphosphate (SSP). The average fertilizer efficiency of FMP was 7.71kg dried pod per 1kg P2O5 applied that was larger than that of SSP (6.79kg dried pod peanut). The peanut yields obtained one year after application of SSP (T2-1) and FMP (T3-1) were not significant differences from the control treatment (P-omission). However, after 2 years of P addition, treatments T2-2 and T3-2, the residual effects of SSP and FMP on the growth, development and yield of peanut were recorded in 2 years later and these parameters significantly differed from the control treatment (T1) and only one year P applied treatments (T2-1 and T3-1).