Effect of correcting P-Zn ratio in calcareous chernozem soil on maize production
1983
Abd Elnaim, M. (Agricultural Research Center, Giza, (Egypt). Soil and Water Research Institute) | Manojlovic, S.
The influence of a high level of soluble phosphates in the carbonatic chernozem on the occurrence of zinc deficit in the nutrition of maize was investigated. The investigation was performed at two localities near Bezdan (Yugoslavia) upon the plots were notable zinc deficit manifested in the single maize hybrid NS 606 and ZG 577. The investigation comprised seven different zinc sources and doses: 1) control - without addition of zinc; 2) 10 kg Zn/ha as ZnSO4; 3) 20 kg Zn/ha as ZnSO4; 4) 1 kg Zn/ha as Zn-EDTA; 5) 3 kg Zn/ha as Zn-EDTA; 6) 1 kg Zn/ha as Zn-DTPA; 7) 3 kg Zn/ha as Zn-DTPA. On the basis of the obtained results it is concluded that all zinc sources had good effects on the growth and yield of maize, but Zn-DTPA was the most efficient, and that with the application of only 1 kg Zn/ha the yield increased notably. It is also stated that the main reason for poor growth and yield of maize is the action of soluble forms of phosphorus and zinc (P : Zn).
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