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
21 Mar 2008
Trigo 2007/08 en la Red de Nutricion de CREA Sur de Santa Fe / Wheat 2007/08 in the Nutrition Network CREA Southern Santa Fe
Report of 2007/08 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe
On 2007/08, three experiments of the Nutrition Network CREA Southern Santa Fe were under wheat. Results indicated that:
- Soil testing at wheat sowing showed residual fertilization effects of previous seasons on nitrate-N, Bray 1 P, and sulfates-S.
- After seven years of experimentation, wheat yields in the continuous Check treatment show the depletion of N, P, and S reserves, reaching only 36% of the yield obtained in the continuous NPS treayment.
- Spikes per m2 and grains per m2 were significantly related to grain yields.
- Considering precipitations from June to November, average water use efficiencies were of 6.1, 10.2, 10.4, 15.8, 16.0 and 16.8 kg/ha per mm, for the treatments Check, PS, NS, NP, NPS and Complete, respectively.
- Average responses to N, P, S, and other nutrients was of 2100, 1930, 102 and 321 kg/ha, respectively. In the three sites, there was a significant response to NP, and at one site to other nutrients. No responses to S were observed in this season.
- Considering the 28 sites under wheat along the 5 seasons evaluated in the Nutrition Network, significant relationships were established between grain yields and soil nitrate-N at sowing + fertilizer N, 130-140 kg/ha allow to reach grain yields of 4000 kg/ha.
- A critical level of 15-20 ppm Bray 1 P was determined.
- Responses to S were not related to sulfate-S availability at planting.
To see the full 2007 Wheat Report, please click here,
Para ver el informe completo, por favor haga click aqui,
