Lambayeque Region Research Articles

Determinación del potencial promotor del crecimiento vegetal de Azotobacter spp. aislados de la rizósfera de malezas en cultivos de maíz (Zea mays L.)

The chemical fertilizer represents for 20 and 30 % of cost the production a crop, used correctly increase productivity and profitability, however, each year increase the among of fertilizer to apply, due to deficiency of soil adsorption and absorption by the plant. Beging maize the third most important crop in Peru, with a significant impact on economic and social activity in 2014, only 40% of the offered maize corresponded of the production nacional. 37 weeds were identified associated with crops of maize from agricultural fields Monsefu districts and Reque, Lambayeque Region, with 68% being dicotyledonous against monocots with 32%. Bacteria were isolated from the rhizosphere of weeds, getting 305 pure cultures of bacteria, 133 of which (43.7%) were identified as Azotobacter spp. Investigated the biochemical reaction in nitrate reduction, utilization of sucrose, glucose, maltose, mannitol, rhamnose, glycerol and sorbitol. Identifying A. vinelandii (58%), A. paspali (13%), A. armeniacus (8%), A. nigricans (8%) and 13 cultives not the species was identified. With this cultives pure of Azotobacter spp. native was quantified to 36.03 ppm of fixed nitrogen as ammonia; 60.75 ppm of indole acetic acid and 6.06 ppm solubilized phosphorus was also determined the activity antagonistic to Fusarium verticillioides, proteolytic and chitinolytic. 20% of Azotobacter spp. native did not affect the emergence of simple hybrid hard yellow corn 144 agriculture, 33% positively affected and 47% negatively affected. In turn, none Azotobacter spp. affect negatively survival. The potential of the plant growth promoter of Azotobacter spp. isolated from weeds in maize crops in the region of Lambayeque been demonstrated.

Sympatric occurrence of four Cathartid vultures in the dry forests of north-western Peru

This photograph, taken with a cameratrap, shows four species of Cathartid vultures: Andean Condor Vultur gryphus, King Vulture Sarcoramphus papa, Turkey Vulture Cathartes aura and Black Vulture Coragyps atratus, feeding together on a horse carcass in the Chaparri Ecological Reserve in Lambayeque region, northwestern Peru. Chaparri Ecological Reserve is a community owned and managed Private Conservation Area of 34,412 hectares that was established in 2000. Both Andean Condors and King Vultures are becoming increasingly frequently seen within the reserve as wildlife populations recover from years of overgrazing and hunting. Chaparri Reserve is located in the western foothills of the Andes where they meet the arid coastal lowlands. The vegetation here is sparse dry forest overing rolling hills, with evergreen gallery woodland along permanent water courses and higher mountains with large

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The yellow maize is the third most important crop in Peru and part of the chain maize-poultry-pig, significant impact on the national economic and social activity, however, in 2011, only 40% of the corn offered corresponded to the domestic industry. Looking for alternatives to reduce the use of chemical fertilizers, have performed investigations with plant growth promoting rhizobacteria. Bacteria were isolated from the rhizosphere of maize from districts Monsefu and Reque, Lambayeque. Dilution was made into sterile saline 0.87% NaCl w/v and plated on MacConkey agar, incubating at 30°C for 48 hours. 269 pure cultures of bacteria were obtained, the biochemical reaction was investigated in agar Triple sugar iron agar Iron Lysine, agar Citrate Simons, peptone broth, red broth methyl Voges-Proskauer and nitrate broth, was identified 66% as Enterobacteriaceae of genera Pantoea (49%), Klebsiella (17%), Kluyvera (16%), Serratia (11%), Citrobacter (4%) and Hafnia (3%). The native enterobacteria were quantified to 31.67 ppm of fixed nitrogen as ammonia; 54.25 ppm indole acetic acid and 4,78 ppm solubilized phosphorus, activity proteolytic and chitinolytic and antagonistic activity of Fusarium verticillioides were also determined. 16% of native enterobacteria did not affect the emergence of hard yellow maize, 77% affected positively and 7% affected negatively. In turn, none bacteria affected survival. Was demonstrated the potential plant growth promoter of enterobacteria isolated from field crops in the region of Lambayeque.

El Indice de la Ventaja Comparativa Revelada (VCR) entre el Perú y los principales exportadores del mundo: el caso de la Región Lambayeque

This paper presents and applies a conceptual framework to regional Competitiveness using the Index of revealed competitiveness introduced by Balassa in 1965 for the Lambayeque Region in the northern part of Peru with the end to determine the products more competitive of this region. In the first part of the article the competitiveness review is presented from the Porter approach to Systemic Competitiveness. The advantage of this method is to identify the competitiveness of the regional products and services as a function of the import and export values of the country in contrast with the same values of the other countries in the world. The FAOSTAT data is used for that purpose. The results shown that the crop most competitive are the avocados, the bananas, mangoes, asparagus, dry chilies and coffee. Nevertheless when these products are compare with others countries such as Chile and Brazil only mangoes and asparagus are strongly competitive. However both products are considered commodities rather than value added products and its competitiveness lies in comparative advantage such as clime and soil.

Economic intensification and degenerative joint disease: Life and labor on the postcontact north coast of Peru

This study tests the hypothesis that the colonial economy of the Lambayeque region of northern coastal Peru was associated with a mechanically strenuous lifestyle among the indigenous Mochica population. To test the hypothesis, we documented the changes in the prevalence of degenerative joint disease (or DJD) in human remains from the late pre-Hispanic and colonial Lambayeque Valley Complex. Comparisons were made using multivariate odds ratios calculated across four age classes and 11 principle joint systems corresponding to 113 late pre-Hispanic and 139 postcontact adult Mochica individuals. Statistically significant patterns of elevated postcontact DJD prevalence are observed in the joint systems of the shoulder, elbow, wrist, and knee. More finely grained comparison between temporal phases indicates that increases in prevalence were focused immediately following contact in the Early/Middle Colonial period. Analysis of DJD by sex indicates postcontact males experienced greater DJD prevalence than females. Also, trends between pre- and postcontact females indicate nearly universally elevated DJD prevalence among native colonial women. Inferred altered behavioral uses of the upper body and knee are contextualized within ecological, ethnohistoric, and ethnoarchaeological frameworks and appear highly consistent with descriptions of the local postcontact economy. These patterns of DJD appear to stem from a synergism of broad, hemispheric level sociopolitical alterations, specific changes to Mochica activity and behavior, regional economic intensification, and local microenvironmental characteristics, which were all focused into these biological outcomes by the operation of a colonial Spanish political economy on the north coast of Peru from A.D. 1536 to 1751.

The Pampa de Chaparrí: Water, Land, and Politics on the North Coast of Peru

AbstractLarge-scale irrigation agriculture formed the economic backbone of civilizations on the north coast of Peru. Contrary to the notion that large systems required the guiding hand of the state, historical sources suggest that management was largely local and segmentary. At the same time, water and land are a potential source of economic and political power for state administrators who may intervene in the supervision and management of farming. The Pampa de Chaparrí, in the Lambayeque region, is an unusually well-preserved system of canals, fields, and settlements where the dynamics of water, land and politics can be observed. Systematic survey documented a Middle Sicán (A.D. 900-1100), Late Sicán (A.D. 1100-1375), Chimú (A.D. 1375-1460) and Inka (A.D. 1460-1532) occupation. During Middle and Late Sicán, settlement patterns reflect the segmentary organization described in historical accounts. With conquest by the Chimú and Inka Empires, state administrative centers were constructed, existing social groups were reorganized and communities and households were transformed. Thus, though local management is an effective and stable strategy for managing large irrigation systems, the wealth and power that these systems represent make them potential targets for more direct state control, with significant consequences for local inhabitants.

Farming Practices and Environmental Problems in an Arid Landscape—A Case Study from the Region of Lambayeque, Peru

This paper is based on findings from a study on irrigation in Peruvian agriculture, carried out in 1991–1992. Irrigation systems in Lambayeque, North Peru, consist of both old and new canals for ro...

Landed but not Powerful: The Colonial Estancieros of Buenos Aires (1750-1810)

I N most of the regions studied in colonial Spanish America, the hacendados have been portrayed as wealthy and powerful members of the elite. In New Spain the nobility invested heavily in land, and in Leon, in the Bajio, hacendados staffed the local cabildo and were at the apex of the rural social structure. Venezuela by the late eighteenth century also had developed a powerful hacendado class: the cacao planters were, in fact, the most important members of the local oligarchy. Already in the late sixteenth century in Peru, heredados dedicated to viticulture built substantial houses in Arequipa, bought public offices, and presided over the social hierarchy. By the middle of the seventeenth century, Chile had a full-blown landed aristocracy of encomenderos and nonencomenderos, while a century and a half later the intendencia of La Paz had a thriving and internally stratified hacendado sector with the most prosperous members-the owners of multiple haciendas-enjoying full elite status. A recent study of the Lambayeque region in Peru identifies the hacendados there as the true source of power. Summarizing the existing literature on colonial large landowners, Susan Ramirez has characterized the hacendados as members of a wealthy, urbanbased elite who played multiple social roles, lived lavishly, and exerted considerable influence.'