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RICARDO MELCHIORI (INTA) AGUSTIN BIANCHINI (AAPRESID) Remote Sensing Workshop. Monmouth, IL. August, 2007 Nitrogen management experiences in Argentina.

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Presentation on theme: "RICARDO MELCHIORI (INTA) AGUSTIN BIANCHINI (AAPRESID) Remote Sensing Workshop. Monmouth, IL. August, 2007 Nitrogen management experiences in Argentina."— Presentation transcript:

1 RICARDO MELCHIORI (INTA) AGUSTIN BIANCHINI (AAPRESID) Remote Sensing Workshop. Monmouth, IL. August, 2007 Nitrogen management experiences in Argentina

2 Spatial resolution for Green Seeker RT 200 in maize By plant hierarchies response to N. TopicsTopics Maize experiences: timing, and Fixed vs. SBNRC comparisons Wheat experiences: cultivar effects on NDVI models

3 Sources of variation that affect N response soil moisture rainfall regimes temperature soil type, previous crop hybrids

4 231 kg N kg/ha 154 kg N 8375 kg/ha 200 kg N 8828 kg/ha 99 kg N 9535 kg/ha Inter-annual maize yield response to N

5 Long term N response variability in continuous maize INTA Parana, ( ) n Average yield: kg/ha n Average optimal N rate = 155 kg N/ha

6 N rates and timing yield response in maize Maize grain yield (kg ha-1) No N at planting 70 kg N ha-1 at planting 140 kg N ha-1 at planting 210 kg N ha-1 at planting 70 kg N ha-1 sidedress

7 Biomass accumulation Biomas kg ha-1 NDVI FUNCTIONS Vegetative nitrogen uptake Grain yield Grain yiel kg ha-1

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9 NUE in FNR vs. SBNRC at different crop growth stages Total Nitrogen use efficiency FIXED RATE SBNRC NITROGEN USE EFFICIENCY kg grain kg N kg grain kg N -1

10 Soil test SBNRC P+S GM $/ha Soil test SBNRC

11 Green Seeker RT 200 Green Seeker RT 200 Adjustment

12 Spatial resolution, for GS RT 200 V6 V8

13 Effect of the number of sensors on SBNRC prescriptions in maize. Effect of the number of sensors on SBNRC prescriptions in maize. Melchiori and Albarenque, 2007 Number of Sensed rows V6 readings Recomendation V8 readings Recomendation % of average

14 New approach: different hierarchies by plant yield response to N N effects on by plant hierarchies. Paraná Nitrogen Team: SOIL FERTILITY, CROP NUTRITION, AND PHYSIOLOGY

15 CV vs Yld CV per plant grain yield (%) Grain yield (kg ha-1)

16 N grain yield response by hierarchies Dominated Dominant By plant relative yield response (%) Per area relative yield response (%)

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18 Wheat experiences: cultivar effects on NDVI models Long season wheat Short season wheat Main difference: tillering capability Long season wheat Short season wheat Main difference: tillering capability

19 Full season Short season Grain Yield

20 Sensor base Wheat yield model Parana ( )

21 On going research and future needs Sept. vs. Dec. planting dates; Wheat/Corn; Row width (20” vs. 28”). RT 200 studies in wheat & corn. By zones N rich strips for using handheld GS. Bands for other stresses (eg. Water), protein content in wheat. Other crops: canola, tobacco, sugarcane.

22 Thank you

23 Interdisciplinary Team (SOIL FERTILITY, CROP NUTRITION, AND PHYSIOLOGY) - N use efficiency

24 grain N (%) NUEg (kg kg N -1 )

25 Regional Nitrogen Response Function (for Entre Rios Province) Low N response Higher N response

26 W4 B1 W3 B2 24 ha Imagen satelital del área experimental Alley et al., 2003 Franja Rica de N

27 Promedio de cinco de años de rendimiento de maíz y remoción de nutrientes por tipo de suelo Suelo Agua DisponibleRendimiento Remoción de Nutrientes NP2O5P2O5 K2OK2O mm/1.2mton/ha Kg/ha B B W W Alley et al., 2003

28 Calculadora de N, Maiz Zona W4 Zona B1 Zona B2 Ingreso de Datos Rend. Máximo, kg/ha Fecha de Siembra19-Sep Fecha de Medición5-Dec NDVI (FRN) NDVI (PDA) EUN esperado0.6 Resultados Indice de Respuesta Días desde Siembra hasta Medición77 Rend. Potencial, kg/ha Rend. Potencial con N, kg/ha Dosis de N, Rec. kg/ha351151

29 W4 B1 W3 B2 24 ha Imagen satelital del área experimental Alley et al., N 51 N 11 N 66 N

30 Diagnóstico de la fertilización para maíz (García, 2004) Siembra Floración 5-6 hojas Madurez Fisiológica 8-10 hojas P (0-20 cm) N-nitratos (0-60 cm) S-sulfatos (0-20 cm) Otros nutrientes: Mg, B, Cu, Zn (0-20 cm) N-nitratos en suelo (0-30 cm) Nitratos en savia de base de tallos Indice de verdor (Minolta SPAD 502) Análisis hoja de la espiga o inferior para concentración total de nutrientes Nitratos en base de tallos Concentración de nutrientes en grano Análisis de Suelo Sensores: Fotografía aérea, N-sensor Pre-Siembra Cosecha Estado de desarrollo del cultivo Balances de N Modelos de simulación

31 N disponible a la siembra y Rendimiento de Maíz # Incluye 5 ensayos del Sudeste de Córdoba y Sur de Santa Fe

32 Fertilización N en Maíz Red de Ensayos AAPRESID-Profertil 2001/02 – 2004/05 23 sitios en Buenos Aires, Córdoba, Entre Ríos, y Santa Fé

33 Fertilización N en Maíz Red de Ensayos AAPRESID-Profertil 2001/02 – 2004/05 23 sitios en Buenos Aires, Córdoba, Entre Ríos, y Santa Fé Nivel Crítico: 20 ppm

34 Concentración crítica de N-NO 3 en V6 y rendimiento en maíz (Echeverría, 2004)


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