Fernando A Lattanzi

Fernando A Lattanzi
National Institute of Agricultural Research of Uruguay · Pastures and Forages

Dr (Technical Univ Munich), MSc & Ing. Agr. (Univ Nac Mar del Plata)

About

96
Publications
17,127
Reads
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1,653
Citations
Citations since 2017
52 Research Items
789 Citations
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2017201820192020202120222023050100150
Introduction
My work focuses on the ecophysiology and agronomy of forage plants. From 2015 to 2020, I was the Director of the Research Program on Pastures and Forages at INIA Uruguay. Since 2021, I work as a Principal Researcher in the same program. Our research spans from breeding of new cultivars to the design of management strategies for sown pastures and natural grasslands. Our aim is to develop systems that combine efficient production with controlled environmental impact.
Additional affiliations
March 2021 - present
National Institute of Agricultural Research of Uruguay
Position
  • Researcher
April 2016 - present
SNI (ANII Uruguay)
Position
  • Investigador Nivel 1
March 2015 - February 2021
National Institute of Agricultural Research of Uruguay
Position
  • Research Director
Education
March 2007 - September 2012
Technische Universität München
Field of study
  • Grassland Science & Crop Production
April 2000 - November 2004
Technische Universität München
Field of study
  • Grassland Science
March 1996 - November 1998
Universidad Nacional de Mar del Plata
Field of study
  • Producción Animal

Publications

Publications (96)
Article
Full-text available
Patterns of synthesis and breakdown of carbon (C) and nitrogen (N) stores are relatively well known. But the role of mobilized stores as substrates for growth remains less clear. In this article, a novel approach to estimate C and N import into leaf growth zones was coupled with steady-state labeling of photosynthesis ((13)CO(2)/(12)CO(2)) and N up...
Article
Measurements of resource capture by individuals, species or functional groups coexisting in field stands improve our ability to investigate the ecophysiological basis of plant competition. But methodological and technical difficulties have limited the use of such measurements. Carbon capture, in particular, is difficult to asses in heterogeneous, d...
Article
Full-text available
Extensive livestock production in southern South America occupies ∼0.5 M km 2 in central-eastern Argentina, Uruguay and southern Brazil. These systems have been sustained for more than 300 years by year-long grazing of the highly biodiverse native Campos ecosystems that provides many valuable additional ecosystem services. However, their low produc...
Article
Full-text available
The diagnosis of the N status of crops is based on the concept of critical N concentration (N-cr), which is the minimum N concentration in shoot biomass (SB) required for maximizing growth. A reference curve of N-cr decrease (Ref-N-cr) with SB increase proposed for C-3 species (Ref-N-cr = 48 SB-0.32) was validated for several crops growing without...
Poster
Full-text available
In this work, we evaluated how the inclusion of tanniferous legumes in natural pastures can affect the dynamics of nitrogen from the urine of beef cattle in the soil and N2O emissions.
Conference Paper
Full-text available
In this work, we evaluated how the inclusion of tanniferous legumes in natural pastures can affect the dynamics of nitrogen from the urine of beef cattle in the soil and N2O emissions.
Conference Paper
Full-text available
In this work we seek to understand how the inclusion of tanniferous legumes in natural grasslands affects N excretions by beef cattle.
Article
Full-text available
En este artículo se presente una línea de investigación que analiza el desafío de generar tecnologías para intensificar predios basados en campo natural, que permitan aumentar su productividad y al mismo tiempo mitigar el impacto ambiental, de manera de lograr sistemas de producción económica y ambientalmente sostenibles.
Article
Argentina grows the second‐largest area of lucerne in the world. Despite its importance, a yield gap exists between potential and measured yields, but factors contributing to it are still unclear. This study aimed to identify management factors and research needs to reduce the lucerne yield gap to improve the livestock systems in this region. We us...
Article
Full-text available
Today's agricultural systems are challenged by providing sufficient food for a growing world population while improving soil and water quality, maintaining farmer profitability (Stephens et al., 2018), and contributing to climate change mitigation (Niles et al., 2018). Nitrogen is an essential nutrient for plant growth and development, and intensif...
Article
Grasses have developed a wide range of morphological and physiological mechanisms to resist herbivory. For instance, they accumulate silicon (Si) in tissue, as physical defence, and associate symbiotically with foliar Epichloë‐endophytes that provide chemical defence via antiherbivore alkaloids. Recent evidence showed that some Epichloë‐endophytes...
Article
Full-text available
Andropogon lateralis is a tall and highly plastic tussock-forming grass native from southern South America. It is a frequent component of Campos and Subtropical highland grasslands that often becomes dominant under lax grazing regimes. The aim of this work was to analyze the response of species diversity and forage production of a natural grassland...
Article
Full-text available
Grasses have a segmental morphology. Compared to leaf development, data on root development at the phytomer level are scarce. Leaf appearance interval was recorded over time to allow inference about the age of segmental sites that later form roots. Hydroponically grown Lolium perenne cv. Aberdart tillers were studied in both spring and autumn in in...
Article
Full-text available
To feed the rising population whilst also preserving ecosystem functions, creative solutions are needed for the ecological intensification of natural grassland-based livestock systems. In Uruguay, natural grasslands are the main nutritional resource for livestock production. In these ecosystems, cattle and sheep graze together all the year round, a...
Article
Background and aims: The concepts of critical nitrogen (N) concentration and nitrogen nutrition index (NNI) provide effective tools for assessing the N nutritional status of pastoral systems. However, no conclusive data exist concerning the effects of stubble height at harvest on the N dilution curve [N concentration (N%) = a(biomass)−b] and mixed...
Article
Full-text available
Cool season grasses associate asymptomatically with foliar Epichloë endophytic fungi in a symbiosis where Epichloë spp. protects the plant from a number of biotic and abiotic stresses. Furthermore, many grass species can accumulate large quantities of silicon (Si), which also alleviates a similar range of stresses. While Epichloë endophytes may imp...
Article
Full-text available
La cuantificación del secuestro de carbono de los agroecosistemas es un gran desafío global. El presente artículo describe el proceso de secuestro de carbono en el suelo y analiza las principales prácticas agronómicas para aumentar su almacenaje en nuestras condiciones. Asimismo, plantea el desafío al que se enfrenta el país de mejorar los inventar...
Article
en Management of native weeds in natural grasslands is a challenging task. Often, recommendations are based on short‐term studies of the response of weed cover and density to different control methods. However, perennial species well adapted to disturbances typically recover from commonly used control techniques. In this long‐term study, we focused...
Article
Full-text available
Ensifer meliloti establishes symbiosis with Medicago sativa (alfalfa) and other perennial species of Medicago that grow in soils with neutral to alkaline pH, whereas Ensifer medicae makes symbiosis with annual medics adapted to moderately acid soils. The new species Rhizobium favelukesii, whose strain is LPU83, belongs to an alfalfa group of ineffi...
Conference Paper
Full-text available
A major constraint to temperate pasture persistence in subtropical environments is the occurrence of periods with low precipitation and high temperature. Under such conditions, plants may delay dehydration by increasing water uptake through the development of deep root systems. Tall Fescue is one of the deepest rooted temperate perennial grasses, a...
Article
Full-text available
Aim Identify key factors driving legume seedlings performance in saline-sodic soils. Methods Five plots were established in paired sub-humid steppes with saline-sodic soils dominated by Distichlis spicata or Panicum coloratum. In each plot, Lotus tenuis was sown in autumn and individual plants were collected close to nurse plants (dominant species...
Conference Paper
Full-text available
Aiming to understand how crop-pasture rotations help to sustain SOC, we present the link between forage dry matter yield (DM) and SOC in nine long-term agricultural systems with an intensification gradient ranging from continuous cropping, to short or long rotations with pastures, differing in mono vs multi-species pastures, including or omitting f...
Conference Paper
Full-text available
Natural grasslands are an extensive ecosystem characterized by a high diversity of plants (C3 and C4) and animals and are used mainly for extensive livestock production. Their productivity is limited by climatic variability and nutrient deficits. The improvement of natural grasslands in Uruguay by adding phosphorus fertilizer (P) and seeding legume...
Poster
Full-text available
Sistemas de produção que aumentem os estoques de carbono (C) do solo são fundamentais para a sustentabilidade da agricultura e, os experimentos de longo prazo são ferramentas essenciais para entender os efeitos do manejo sobre os estoques do Carbono (Bayer et al. 2009). Alguns experimentos de longo prazo têm demostrado que rotações que incluem past...
Article
Full-text available
The practice of inoculating forage legumes with rhizobia strains is widespread. It is assumed that the inoculated strain determines the performance of the symbiosis and nitrogen fixation rates. However, native-naturalized strains can be competitive, and actual nodule occupancy is often scarcely investigated. In consequence, failures in establishmen...
Article
Full-text available
The practice of inoculating forage legumes with rhizobia strains is widespread. It is assumed that the inoculated strain determines the performance of the symbiosis and nitrogen fixation rates. However, native-naturalized strains can be competitive, and actual nodule occupancy is often scarcely investigated. In consequence, failures in establishmen...
Article
The aim of the present study was to evaluate the abundance and dynamics of white clover (WC) (Trifolium repens L.) under cattle grazing, in a stressful environment. To this end, we performed a 5-yr experiment in Buenos Aires province, Argentina, where treatments were low and high forage offers (LFO and HFO) of a tall fescue (TF) [Lolium arundinaceu...
Article
Full-text available
Nitrogen stable isotope (¹⁵N) natural abundance is widely used to study nitrogen cycling. In grazed ecosystems, urine patches are hot-spots of nitrogen inputs, losses, and changes in δ¹⁵N. Understanding δ¹⁵N dynamics in urine-affected vegetation is therefore crucial for accurate inferences from ¹⁵N natural abundance in grasslands. We hypothesized t...
Data
Assumptions and R code underlying Fig 1. (TXT)
Data
Original data pot experiment–leaf cohorts. (CSV)
Data
Relationship between the proportion nitrogen contained in Trifolium repens and mixture nitrogen concentration / isotope composition. (PDF)
Data
Original data field observations. (CSV)
Data
Development of leaf length of successive leaf cohorts of Lolium perenne over time. (PDF)
Data
Original data pot experiment–bulk biomass. (CSV)
Data
Relationship between leaf and bulk aboveground biomass values of nitrogen concentration and isotopic composition. (PDF)
Article
Full-text available
Maximizing forage intake rate is one strategy to improve the performance of cattle grazing natural grasslands of the Pampa Biome. This rests on understanding animal responses to variation in both quantity and nutritive value of these heterogeneous pastures. The aim was to assess the ability of data on sward structure, botanical composition, and the...
Poster
Full-text available
El presente trabajo muestra relaciones entre el porcentaje de parches de Alturas de Campo Natural y la ganancia de peso vivo de terneros
Poster
Full-text available
Soil organic carbon (SOC) is an indicator of quality and productivity of agricultural soils. However, few long-term experiments have analysed how crop-pasture sequences affect SOC stocks. For this it is necessary to explore different soil types, rotations, climatic conditions and duration of treatments. Thus, we are constructing and analysing a dat...
Poster
Full-text available
Se compiló información de composición química y valor nutritivo de más de 25,000 muestras de alimentos utilizados para el consumo animal. El OBJETIVO es crear la versión 1.0 de una herramienta de actualización constante y visualización interactiva online (http://pasturas.inia.org.uy/calidad) que permita a los usuarios acceder a (i) valores más prob...
Poster
Full-text available
Festuca (Lolium arundinaceum (Schreb.) Darbysh) es ampliamente utilizada en pasturas perennes del Uruguay, pero se han detectado problemas de persistencia. Los hongos endófitos benéficos no tóxicos (no producen ergoalcaloides y no producen festucosis) han sido objeto de diversos estudios que evaluaron la mayor resistencia a estreses bióticos y abió...
Poster
Full-text available
Los pastizales del Río de la Plata, son un extenso ecosistema localizado en Uruguay, sur de Brasil y centro este de Argentina y distribuido sobre una gran variedad de suelos. La variabilidad climática y las deficiencias de nutrientes son consideradas las principales limitantes para la productividad. El fosforo (P) disponible promedio para una gran...
Article
Bromus auleticus Trinius (ex Nees) is a perennial allogamous C3 grass native to the Campos grasslands. It has potential to play a key role in restoration of both abandoned agricultural and overgrazed lands. We aim to reveal the existence of local adaptation and to assess whether phenotypes could be differentiated in relation to their ecogeographic...
Conference Paper
Full-text available
Plant coexistence can be affected by the interaction of multiple plant symbionts. The outcome of co-infection with arbuscular mycorrhizal fungi (AMF) and foliar endophytic fungi (FEF) in grasses is variable and may range from antagonism to synergism. Here we tested whether a nitrogen-fixing legume affects grass response to the presence of both type...
Conference Paper
Full-text available
The Campos are natural grasslands covering 350,000 km 2 across Uruguay and southern Brazil, and mainly used for animal production in extensive grazing systems. These grasslands are characterized by soils with low phosphorus (P) availability and limited water storage capacity. Therefore, climatic variability and nutrient deficits are considered to b...
Article
Full-text available
Aims Plants interact by modifying soil conditions in plant-soil feedback processes. Foliar endophytes of grasses exert multiple effects on host rhizosphere with potential consequences on plant-soil feedback. Here, we hypothesize that the grass-endophyte symbiosis impairs soil symbiotic potential, and in turn influences legume performance and nitrog...
Article
Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this...
Article
Understanding the role of individual organisms in whole-ecosystem carbon (C) fluxes is probably the biggest current challenge in C cycle research. Thus, it is unknown whether different plant community members share the same or different residence times in metabolic (τmetab ) and nonmetabolic (i.e. structural) (τnonmetab ) C pools of aboveground bio...
Conference Paper
Full-text available
Most forage plants host at least one microbial symbiont that affects their relationship with their biotic and abiotic environment. In particular, cool season grasses are naturally associated with aerial fungal endophytes, which usually increase their growth by conferring protection from herbivores. Meanwhile, legumes establish mutualistic symbioses...
Article
Full-text available
The coexistence of symbionts with different functional roles in co-occurring plants is highly probable in terrestrial ecosystems. Analyses of how plants and microbes interact above- and belowground in multi-symbiotic systems are key to understand community structure and ecosystem functioning. We performed an outdoor experiment in mesocosms to inves...
Article
Full-text available
In grasslands, sustained nitrogen loading would increase the proportion of assimilated carbon allocated to shoot growth (A shoot), because it would decrease allocation to roots and also encourage the contribution of species with inherently high A shoot. However, in situ measurements of carbon allocation are scarce. Therefore, it is unclear to what...
Article
Full-text available
Carbon (C) allocation strongly influences plant and soil processes. Short-term C allocation dynamics in ecosystems and their responses to environmental changes are still poorly understood. Using in situ 13CO2 pulse labeling, we studied the effects of 1 wk of shading on the transfer of recent photoassimilates between sugars and starch of above- and...
Article
Short leaf life span is thought to be associated with low construction costs and consequently short payback times. Frequent defoliation could decrease the available payback time and force individuals to decrease construction costs to maintain a positive carbon balance. Therefore, we hypothesize that dominant species of frequently grazed pastures sh...
Article
Full-text available
München, Techn. University, Diss., 2004. Computerdatei im Fernzugriff.
Article
Full-text available
Zielsetzung: Die vorliegende Arbeit befasst sich mit der Nutzung von C- und N-Substraten im Blattwachstum einer C3 (Lolium perenne L.) und einer C4 Grasart (Paspalum dilatatum Poir.). Es soll insbesondere geklärt werden wie C- und N-Substrate in Blattflächenwachstum umgesetzt werden, und aus welchen Quellen diese Substrate stammen. Diese Fragestell...
Chapter
Cells, organisms and ecosystems are interconnected and interdependent metabolic networks, which are operated by carbon substrate fluxes. Isotope methodologies are useful tools for tracing these fluxes. A large diversity of tracer approaches is available for such investigations, ranging from uses of position-labelled 13C substrates in steady-state s...
Chapter
Dark respiration is a major drain for carbon substrates in plants. Until recently, little was known about the quantitative importance and functional characteristics of stores as substrate suppliers for plant respiration under stresses. Here we review recent work with Lolium perenne L., a perennial grass, subject to nitrogen stress or regular (diurn...