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
10 May 2010
Trigo 2009/10 en la Red de Nutricion de CREA Sur de Santa Fe / Wheat 2009/10 in the Nutrition Network CREA Southern Santa Fe
Report of 2009/10 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe
On 2009/10, two 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 nine years of experimentation, wheat yields in the continuous Check treatment show the depletion of N, P, and S reserves, reaching only 31% of the yield obtained in the continuous NPS treayment.
- Grain yields were highly affected by the initial drought at Balducchi, and by frosts at tillering at both sites.
- Considering precipitations from June to November, average water use efficiencies were of 7.3, and 14.2 kg/ha per mm, for the treatments Check, and NPS, respectively.
- Average responses to N, P, S, and other nutrients was of 1342, 907, 160 and 256 kg/ha, respectively. In the two sites, there was a significant response to N, P and NP. No responses to S were observed in this season.
- Considering the 33 sites under wheat along the 9 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 2009 Wheat Report, please click here,
Para ver el informe completo, por favor haga click aqui,
Photos of the 2009/10 wheat experiments: