Establishing a Plant Nutrition Network for the CREA Region in Southern Santa Fé
On-farm field experiments establish as a long-term network in 2000, to evaluate responses to N, P, and S in wheat, soybean, and maize in the southern Santa Fe and Southeastern Cordoba regions. Evolution of soil properties are evaluated periodically in teh different treatments.
IPNI-2000-ARG-12
03 Apr 2009
Trigo 2008/09 en la Red de Nutricion de CREA Sur de Santa Fe - Wheat 2008/09 in the Nutrition Network CREA Southern Santa Fe
Report of 2008/09 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe
On 2008/09, four experiments of the Nutrition Network CREA Southern Santa Fe were under wheat. Results indicated that:
- Residual effects of previous fertilizations were observed for nitrate-N, Bray 1 P, and sulfate-S
- After 8 yeras of experimentation, the Check plots show the depletion of soil N, P, and S reserves; reaching only 64% of the wheat yeild of the NPS treatment.
- Wheat yields in 2008 were greatly affected by the severe drought that affected the region, and also by freezing on jointing stages.
- Significant responses were to P and NPS at La Blanca, to NS and NP at La Hansa, and to PS and NP at Lambaré.
- Water use efficiency (WUE) increased when N, P and/or S defeiciencies were eliminated, averages of 4.9 kg/mm for the Check and 7.3 kg/mm for the NPS treatment.
- Considering 22 of the 31 sites of the six wheat seasons evaluated, a significant relationship between wheat yield and soil nitrate-N + fertilizer n at planting was established. Wheat yields of 4000 kg/ha might be reached with soil N availability of 130-140 kg N/ha.
- P responses are highly probable at sites with soil Bray 1 P lower than 15 ppm, and no responses were observed at sites where soil Bray 1 P was greater than 20 ppm.
- S responses were not related to soil sulfate-S availability.
To see the full 2008 Wheat Report, please click here,
Para ver el informe completo, por favor haga click aqui,