Arnulfo Aldrete

Colegio de Postgraduados | CP · Department of Forestry

Cold hardiness and timing of bud set and bud break are important processes that provide protection of nursery seedlings against low temperatures. Seedlings of 9 provenances of Pinus greggii from two different regions of Mexico were tested to determine cold hardiness, bud set, and bud break timing differences. Needle sections were exposed to freezin...

Root spiraling, root egression through drainage holes, and poor growing medium drainage are common problems in polybag seedling production systems in Mexico. Two commercially and environmentally important Mexican conifer species, Pinus pseudostrobus Lindi. and Pinus montezumae Lamb., were grown in simulated Mexican “platabanda” nursery conditions....

México's incredibly diverse forests are designated by federal regulations as “multipurpose” and managed for the benefit and economic welfare of the local communities. In addition to traditional wood products, the forests provide grazing lands, nonwood forest products, fuelwood, and ecosystem services. Unfortunately, growing populations and the stru...

Introducción: El uso de fertilizantes para la producción de planta forestal en vivero mejora la calidad y favorece el desempeño en campo.Objetivo: Identificar los efectos de dosis de fertilización sobre el crecimiento de Pinus patula Schiede ex Schltdl. & Cham. en condiciones de vivero, y la supervivencia y crecimiento en campo.Materiales y métodos...

Desde el año 2003 en algunos viveros forestales del país se utilizan sustratos con aserrín fresco de pino y oyamel. Debido a la disponibilidad de aserrín de una variedad mayor de especies, este estudio planteó la hipótesis de que los sustratos con aserrín fresco de latifoliadas son aptos para producir planta de Pinus patula con calidad similar a la...

Introduction: Genetic improvement and nutritional management are used to increase productive capacity. Objective: To analyze the effect of traditional and controlled-release fertilizers, as well as the way to define the doses (technically or empirically), on growth of 20 tree families of Pinus patulaSchiede ex Schltdl. & Cham. Materials and methods...

SUMMARY The volume of the container determines the shape and size of the root of the plants, the amount of substrate, water and mineral nutrients available for plant growth and influences the production costs. In this research, the effect of 10 containers of different type and volume on the growth of Pinus cembroides Zucc. was evaluated in the nurs...

El presente estudio tuvo como objetivo evaluar la eficiencia estadística de seis estimadores de muestreo para plantear una estrategia de muestreo óptima en términos de precisión y tiempo que permita realizar inventarios maderables operativos que apoyen la toma de decisiones orientadas a mejorar el manejo técnico de plantaciones forestales comercial...

El volumen del contenedor determina la forma y tamaño de la raíz de las plantas, la cantidad de sustrato, agua y nutrientes minerales disponibles para su crecimiento e influye en los costos de producción. En este ensayo se evaluó el efecto de 10 contenedores de diferente tipo y volumen sobre el crecimiento en vivero de plantas de Pinus cembroides Z...

An important strategy for meeting global landscape restoration goals is nursery production of high-quality seedlings. Growing seedlings with attributes that promote post-planting survival and growth can be dramatically influenced by the nursery container system. In many countries, nurseries produce seedlings in polybags filled with excavated soil....

La planta producida en charolas desarrolla raíces envolventes que afectan su crecimiento posterior. El objetivo del estudio fue evaluar la morfología y el crecimiento radical de Pinus patula Schiede ex Schltdl. et Cham. producido en tres tipos de charolas con cavidades de 170 cm3, dos de plástico y una de poliestireno, con y sin recubrimiento de co...

Los sustratos a base de aserrín crudo de pino y corteza compos­tada de pino, con fertilizantes de liberación controlada, son una alternativa para producir planta forestal en vivero. El objetivo de este estudio fue evaluar el efecto del sustrato, fertilizante de liberación controlada (FLC) y fertilizante hidrosoluble (FH) en el crecimiento de Pinus...

Introduction: Annual variation in growth ring characteristics has an impact on productivity and wood quality. Objective: To evaluate radial growth in two Pinus patula Schltdl. & Cham. plantations of different ages and thinning intensity, as well as its relationship to interannual variation in temperature and rainfall. Materials and methods: Growth...

Pinus patula Schiede ex Schlechtendal & Chamisso is an endemic species of Mexico, with significant economic relevance due to its high productive potential in forest plantations and natural forests. The intensity and frequency of thinning cuts generally influence the thickness of the annual growth rings, the proportion of latewood, and the tapering...

Substrates based on raw pine sawdust and composted pine bark, with controlled-release fertilizers, are an alternative for producing forest plants in nurseries. The aim of this study was to evaluate the effect of substrate, controlled-release fertilizer (FLC) and water-soluble fertilizer (FH) on the growth of Pinus cembroides Zucc. in nursery. The m...

Pinus patula Schiede ex Schldl. et Cham. es una especie endémica de México utilizada en plantaciones forestales comerciales en Sudamérica y Sudáfrica. La propagación masiva de materiales mejorados de esta especie, a través de estacas enraizadas, permite aumentar su productividad y homogeneizar sus productos. Se compararon cinco sustratos a base de...

El crecimiento y la supervivencia de Pinus patula se evaluaron en campo durante dos años.  La planta con poda radicular tuvo crecimiento y supervivencia mayores que la planta sin poda.  La poda radicular aérea tuvo efectos similares en la planta que la poda radicular química.  Los tubetes de plástico y charolas de poliestireno favorecieron el cr...

Rooting substrate and fertilization are key components in the production of containerized seedlings, as they can influence the morphological and physiological characteristics of the plants,which in turn can impact outplanting performance. The objective of the study was to evaluate the effect of four substrates based on mixtures of peat moss (PM), c...

Abstract Introduction: One strategy to improve plant quality is fertilization hardening, which promotes the accumulation of nutrients. Objective: To evaluate hardening in Pinus rudis Endl. plants with different levels of phosphorus (P), potassium (K) and soluble fertilizer (SF) in irrigation. Materials and methods: A completely randomized design wa...

Los modelos dinámicos de crecimiento y rendimiento maderable son importantes para tomar decisiones en el manejo forestal. Estos modelos predicen la dinámica futura en función de atributos del rodal y son herramientas prácticas para aplicar silvicultura en la planeación del manejo de bosques naturales y plantaciones. En México, teca (Tectona grandis...

Genetic variation in reproductive phenology among clones in a seed orchard affects the genetic efficiency of the orchard. Our objective was to evaluate genetic variation in reproductive phenology of Pinus patula clones in a seed orchard and the amount of overlap with pollen dispersal in natural stands. In 2014 and 2015, phenology of female and male...

La selección del sitio adecuado para establecer plantaciones forestales es crucial si se desea maximizar su probabilidad de éxito. Los análisis de aptitud de tierras sirven para ese propósito al empatar los requerimientos ecológicos de las especies a plantar con el potencial productivo del suelo y con las condiciones climáticas existentes para el c...

Las características físicas y químicas de los sustratos son importantes para obtener planta en vivero con características morfológicas adecuadas. Se caracterizaron tres sustratos de uso actual en viveros forestales: S1: turba de musgo, vermiculita y perlita; S2: corteza compostada, turba de musgo y aserrín y S3: aserrín de pino, turba de musgo y co...

Introduction: Damping-off is a common disease in forest nurseries that causes significant economic losses worldwide. Objective: To evaluate the pathogenicity and incidence of Fusarium circinatum Nirenberg & O´Donnell in seedlings of Pinus greggii Engelm. ex Parl., and the use of Trichoderma harzianum Rifai as a biocontrol in three substrates. Mat...

The physical and chemical characteristics of the substrates are important to obtain a nursery plant with adequate morphological characteristics. Three substrates of current use in forest nurseries were characterized: S1: moss peat, vermiculite and perlite; S2: composted bark, peat moss and sawdust and S3: pine sawdust, moss peat and composted bark,...

Substrate is a factor that significantly influences the quality and production costs of nursery seedlings. The objective of this study was to evaluate combinations of peat moss, composted pine bark, and fresh pine sawdust in order to identify the proportions that favour the quality of Pinus engelmannii Carr. seedlings and minimise the production co...

Asegurar el éxito de los programas de reforestación requiere el uso de planta de alta calidad. El empleo de sustratos alternativos de amplia disponibilidad y bajo costo (aserrín y corteza compostada) puede ser una opción viable para su producción. En este contexto, se evaluaron cuatro sustratos (aserrín de pino crudo, corteza de pino compostada y t...

Se construyó un sistema de cubicación de árbol individual generado a partir de una función segmentada de ahusamiento para plantaciones de Tectona grandis establecidas en Campeche, Tabasco y Chiapas. Se cubicaron 144 árboles de diferentes edades; para cada uno se midió el diámetro con corteza y la altura sobre el fuste a 1 m después del tocón hasta...

Bursera linanoe (La Llave) Rzedowski, Calderón & Medina is a species with economic and social value. Germination of seeds is a problem for the propagation of this species. The objectives of this study were to determine the effect of scarification, temperature and storage period on seed germination of B. linanoe and to estimate the variation in emer...

Por su vecindad con la Ciudad de México, que es el núcleo con mayor población del país, el estado de Morelos ha recibido una considerable presión sobre sus recursos forestales; el bosque tropical caducifolio es uno de los tipos de vegetación más impactados. A fin de conocer el estado de conservación de esta asociación, se realizó un estudio en el q...

In the nursery, the container, substrate and fertilization affect morphological and physiological characteristics of the plants. The objective of this study was to evaluate growth of Pinus greggii var. australis through interaction of containers, substrates and forms of fertilization. The experimental design was completely randomized with a 2x3x2 f...

In the nursery, the container, substrate and fertilization affect morphological and physiological characteristics of the plants. The objective of this study was to evaluate growth of Pinus greggii var. australis through interaction of containers, substrates and forms of fertilization. The experimental design was completely randomized with a 2×3×2 f...

The drying disease affects plants grown in forest nurseries during the pre-emergence and post-emergence stages, constricting the stem and causing root rot. The objectives of this study were to identify the morphological and molecular characteristics of the Fusarium species that affects the nursery located in Atlangatepec, Tlaxcala, which causes the...

The drying disease affects plants grown in forest nurseries during the pre-emergence and post-emergence stages, constricting the stem and causing root rot. The objectives of this study were to identify the morphological and molecular characteristics of the Fusarium species that affects the nursery located in Atlangatepec, Tlaxcala, which causes the...

Introduction: Plants should undergo a hardening process in the nursery to improve the survival of forest plantations in degraded areas. Purpose of the study: The effect of three levels of irrigation was evaluated in the hardening stage on some morphological and physiological variables of Pinus oaxacana. Materials and Methods: The treatments evalu...

Los silvicultores de la zona tropical húmeda de México requieren orientación sobre los tratamientos que deben aplicar a sus plantaciones de Cedrela odorata y el crecimiento que pueden obtener, para lo cual se realizó el presente trabajo en 22 plantaciones en Tabasco. Los objetivos fueron desarrollar un modelo para determinar el índice de sitio a tr...

Foresters of the humid tropical zone of Mexico require direction regarding what treatments they should apply to their plantations of Cedrela odorata and the growth rates they can obtain. For this reason, the present study was conducted in 22 plantations in Tabasco, Mexico. The objectives were to develop a model to determine site index through algeb...

Pollen flow from natural populations towards seed orchards has a negative effect on the genetic quality of germplasm produced. The objective of the study was to evaluate the potential gene flow into a Pinus patula clonal seed orchard from nearby natural stands. In 2014 and 2015, pollen traps were established at the center and periphery of the seed...

Ecological restoration is considered an important tool to reverse the degradation conditions that diverse ecosystems present worldwide, where its purpose is to recover the ecosystem structure and processes. Reforestation is a widely used strategy for restoration, which generally considers only the survival and growth as part of its monitoring. Ther...

El vigor de un árbol se puede evaluar a partir del follaje, que si bien representa de 4% a 6% de la biomasa total del árbol, es el componente principal para los procesos fisiológicos. El objetivo de este estudio fue estimar la biomasa de acículas en ramas individuales y árbol completo, y ajustar modelos de partición de biomasa aérea en árboles plan...

Introducción: Un vivero forestal debe contar con abundante provisión de agua de calidad. El agua de características deficientes puede contener sales, iones tóxicos, contaminantes o fitopatógenos. No obstante, en México la calidad del agua en dichos viveros ha recibido poca atención. Por ello, se planteó como objetivo realizar un diagnóstico de la c...

In a covered root seedling production system, container characteristics are important because they can affect morphology and seedling quality, mainly root characteristics. The objective of this study was to evaluate the effect of container design (with and without lateral drainage) and color (black, transparent and white) on growth and development...

Pine sawdust has been utilized for plant production in forest nurseries with promising results. The objective of the present study consisted in proving the effectiveness of two substrates of these materials and two controlled release fertilizers. Pinus pseudostrobus was produced in polystyrene trays with 77 cavities, with: S1 (60, 15, 15, and 10 %...

El aserrín de pino se ha empleado para la producción de planta en los viveros forestales con resultados prometedores. El objetivo del presente trabajo consistió en probar la eficiencia de dos sustratos de ese material y dos fertilizantes de liberación controlada. Se produjo Pinus pseudostrobus en charolas de poliestireno de 77 cavidades, con S1 (as...

Controlled-release fertilizers are not frequently used in forest nurseries, mainly because their advantages are unknown. The objective of this study was to test the effectiveness of three controlled-release fertilizers combined with two substrates. Pinus montezumae Lamb. plants were grown in polystyrene trays with three dosages (4, 6 and 8 g L-1) o...

Introducción: Un vivero forestal debe contar con abundante provisión de agua de calidad. El agua de características deficientes puede contener sales, iones tóxicos, contaminantes o fitopatógenos. No obstante, en México la calidad del agua en dichos viveros ha recibido poca atención. Por ello, se planteó como objetivo realizar un diagnóstico de la c...

La producción tradicional de Hevea brasiliensis en bolsa de plástico presenta varios problemas operativos y de calidad de planta. Con el fin de generar alternativas en vivero, se evaluó el efecto de distintos tamaños de contenedor (1.5 y 2.0 L) y cinco mezclas de sustrato: turba, vermiculita y agrolita (5:3:2); fibra de coco, vermiculita y agrolita...

El preacondicionamiento tiene como propósito aclimatar la planta a las condiciones adversas de los sitios de plantación. Aquí se evaluaron características morfológicas y fisiológicas de Pinus engelmannii Carr. durante el preacondicionamiento, bajo cuatro condiciones ambientales (invernadero, intemperie, malla sombra y malla sombra más intemperie) y...

Swietenia humilis is a valued tree species for its high-quality wood, among other comercial interests. Attempts to plant the species in Southwest Mexico have often failed due to poor quality seedlings combined with low soil fertility and dry environments. Nursery top-pruning and fertilization are practices previously reported to improve seedling qu...

Actualmente existen publicaciones donde se abordan múltiples y diversos índices de vegetación (IV), sin embargo, la evidencia teórica y experimental manifiesta problemas en su diseño y aplicación. En este trabajo se analizan sesenta IV, usando modelos radiativos de interacciones de orden uno y dos. Los IV analizados se desarrollan en un formato gen...

The hardening stage in the nursery acclimatizes seedlings for the harsh conditions at the planting site. This study evaluated morphological and physiological characteristics on Pinus engelmannii Carr. during the hardening stage at the nursery, at four shading conditions (greenhouse, outdoor, outdoor shade-cloth, and shade-cloth combination) and an...

El Sureste de México es una región de alto potencial para el establecimiento de plantaciones forestales comerciales (PFC). Aunque la superficie de éstas se ha incrementado en esa región, los resultados de los experimentos con especies forestales exóticas y de rápido crecimiento rara vez se difunden. Este trabajo muestra resultados de un experimento...

Hyblaea puera Cramer (Lepidoptera: Hyblaeidae) was reported in commercial teak (Tectona grandis L. f.) plantations in the states of Campeche and Tabasco in southeastern Mexico, from 2011 to 2013. By 2013, more than 1,000 and 4,000 ha of teak were attacked by H. puera in Tabasco and Campeche, respectively. It is necessary to monitor and detect of th...

Southeast México could potentially harbor commercial forest plantations (CFP). Although CFP acreage is increasing in that region, results from field experiments with exotic and fast growing species are seldom published. This work shows results from a factorial experiment carried out from 2009 to 2012 which evaluated effects of NPK fertilization and...

Currently, multiple and diverse vegetation indices (VI) are published. However, theoretical and experimental evidence indicates that problems exist in their design and application. In this paper, sixty indices were analyzed using radiative models of interactions of order one and two. The VI analyzed were converted into a general format associated w...

La producción tradicional de Hevea brasiliensis en bolsa de plástico presenta varios problemas operativos y de calidad de planta. Con el fin de generar alternativas en vivero, se evaluó el efecto de distintos tamaños de contenedor (1.5 y 2.0 L) y cinco mezclas de sustrato: turba, vermiculita y agrolita (5:3:2); fibra de coco, vermiculita y agrolita...

Because one of the main problems that Enterolobium cyclocarpum faces in the planting site is the presence of weeds, to grow plants presenting appropriate characteristics that enable them to overcome these adverse conditions during reforestation appears as necessary. Therefore, after evaluating the responses of various morphological and physiologica...

Vegetation indices (VI) have been proposed as an indirect way of measuring biophysical vegetation variables, based on spectral data obtained with remote sensing. We analyzed the VI from a theoretical perspective considering the interactions of first and second order, as well as the radiative transfer problem present in homogenous and heterogeneous...

E l presente trabajo se realizó en plantaciones comerciales de Eucalyptus urophylla de la empresa Forestaciones Operativas de México, S. A. de C. V. (FOMEX) en Huimanguillo, Tabasco, Méxi - co, con la finalidad de conocer el efecto de la adición de boro (B) sobre el crecimiento de dicha especie. Se dio seguimiento a 199 árboles de E. urophylla que...

Pine sawdust and bark, wood waste products of the forest industry, can be used as substrate and substitute peat moss in the production of nursery plants. Therefore, growth of Pinus montezumae Lamb. seedlings was assessed in containers with substrates composed of pine bark and sawdust, which were used to form nine mixtures. There was also a control...

RESUMEN Los índices de vegetación (IV) se han propuesto como una forma indirecta de medir variables biofísicas de la vegetación con base en datos espectrales obtenidos con sensores remotos. En el presente trabajo se analizaron los IV desde una aproximación teórica al considerar las interacciones de primer y segundo orden, al igual que el problema d...

A dominant height growth model and corresponding site index expression, allows estimati