Converting simulated total dry matter to fresh marketable yield for field vegetables at a range of nitrogen supply levels

Nendel, Claas; Schmutz, Ulrich; Venezia, A.; Piro, F.; Rahn, Clive

doi:10.1007/s11104-009-0015-0

Cited by 10 publications

(4 citation statements)

References 56 publications

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“…However, with very high N rates there can be an increase of non-MY as it has been often observed in processing tomato (Tei et al, 2002a), and as a consequence the N a UE calculated on an MY basis can decrease (Table 2). A similar behavior also was found in the case of limiting N availability (Nendel et al, 2009;Rather and Schenk, 2005).…”

Section: Speciessupporting

confidence: 70%

The Nitrogen Use Efficiency: Meaning and Sources of Variation—Case Studies on Three Vegetable Crops in Central Italy

Benincasa¹,

Guiducci²,

Tei³

2011

hortte

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Nitrogen (N) use efficiency (NUE) of crops is examined by taking into account both plant N uptake efficiency, focusing on the recovery of fertilizer-N, and the utilization efficiency of the absorbed N. The latter is further analyzed as the overall effect of the absorbed N on crop leaf area, light absorption, photosynthesis, crop growth, biomass partitioning, and yield. The main sources of variation for the NUE of crops are considered, and several of them are discussed based on results from field experiments carried out at the University of Perugia (central Italy) between 1991 and 2008 on sweet pepper (Capsicum annuum), lettuce (Lactuca sativa), and processing tomato (Solanum lycopersicum). More specifically, the effects of species, cultivar, fertilizer-N rate, form and application method (mineral and organic fertilization, green manuring, fertigation frequency), and sink limitation are reported. Implications for residual N in the soil and leaching risks are also discussed. The fertilizer-N rate is the main factor affecting crop NUE for a given irrigation management and rainfall regime. Indeed, avoiding over fertilization is the first and primary means to match a high use efficiency and economic return of fertilizer-N with limited environmental risks from nitrate leaching. The form and application method of fertilizer-N also may affect the NUE, especially in the case of limiting or overabundant N supply. Particularly, high fertigation frequency increased the recovery of fertilizer-N by the crop. It is suggested that species-specific curves for critical N concentration (i.e., the minimum N concentration that allows the maximum growth) can be the reference to calibrate the quick tests used to guide dynamic fertilization management, which is essential to achieve both the optimal crop N nutritional status and the maximum NUE.

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Section: Speciessupporting

confidence: 70%

The Nitrogen Use Efficiency: Meaning and Sources of Variation—Case Studies on Three Vegetable Crops in Central Italy

Benincasa¹,

Guiducci²,

Tei³

2011

hortte

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“…This approach is considered the most feasible, considering the vast range of different crop types and morphologies among field vegetables and the resulting difficulties in applying generic photosynthesis-driven algorithms. Marketable parts of the crops and, correspondingly, the amount of residues to remain in the field are calculated using a population approach for row crops providing a single product per plant and a regression approach for others (Nendel et al 2009). The population approach uses crop-specific dry matter concentrations and a distribution coefficient for individual weights to calculate a fresh weight distribution of the plant population.…”

Section: The Eu-rotate_n Simulation Modelmentioning

confidence: 99%

“…This approach reflects the water and N availability to individual plants at varying planting spaces. For non-row crops an empirical transfer function was used to calculate fresh marketable yield for different N supply levels (Nendel et al 2009).…”

Section: The Eu-rotate_n Simulation Modelmentioning

confidence: 99%

“…Root growth is calculated by a thermal time approach and distributed spatially in a 2D soil cell grid (Pedersen et al 2010), allowing for the simulation of spacing effects in row crops (Nendel et al 2009). Crop and soil-specific rooting depth enables deep and shallow rooted crops, and their characteristic N exploitation from the soil, to be simulated.…”

Section: The Eu-rotate_n Simulation Modelmentioning

confidence: 99%

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The performance of the EU-Rotate_N model in predicting the growth and nitrogen uptake of rotations of field vegetable crops in a Mediterranean environment

Nendel¹,

Venezia

Piro

et al. 2012

J. Agric. Sci.

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SUMMARYThe EU-Rotate_N model was developed as a tool to estimate the growth and nitrogen (N) uptake of vegetable crop rotations across a wide range of European climatic conditions and to assess the economic and environmental consequences of alternative management strategies. The model has been evaluated under field conditions in Germany and Norway and under greenhouse conditions in China. The present work evaluated the model using Italian data to evaluate its performance in a warm and dry environment. Data were collected from four 2-year field rotations, which included lettuce (Lactuca sativa L.), fennel (Foeniculum vulgare Mill.), spinach (Spinacia oleracea L.), broccoli (Brassica oleracea L. var. italica Plenck) and white cabbage (B. oleracea convar. capitata var. alba L.); each rotation used three different rates of N fertilizer (average recommended N1, assumed farmer's practice N2 = N1 + 0·3 × N1 and a zero control N0). Although the model was not calibrated prior to running the simulations, results for above-ground dry matter biomass, crop residue biomass, crop N concentration and crop N uptake were promising. However, soil mineral N predictions to 0·6 m depth were poor. The main problem with the prediction of the test variables was the poor ability to capture N mineralization in some autumn periods and an inappropriate parameterization of fennel. In conclusion, the model performed well, giving results comparable with other bio-physical process simulation models, but for more complex crop rotations. The model has the potential for application in Mediterranean environments for field vegetable production.

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Modelle zum Stickstoffhaushalt

Nendel

2004

Handbuch Der Umweltwissenschaften

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Converting simulated total dry matter to fresh marketable yield for field vegetables at a range of nitrogen supply levels

Cited by 10 publications

References 56 publications

The Nitrogen Use Efficiency: Meaning and Sources of Variation—Case Studies on Three Vegetable Crops in Central Italy

The Nitrogen Use Efficiency: Meaning and Sources of Variation—Case Studies on Three Vegetable Crops in Central Italy

The performance of the EU-Rotate_N model in predicting the growth and nitrogen uptake of rotations of field vegetable crops in a Mediterranean environment

Modelle zum Stickstoffhaushalt

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