10 research outputs found
EmergĂa de tres sistemas agroforestales en el sur del municipio de lempira, honduras
Se evaluaron el uso de recursos y la sostenibilidad de tres sistemas agroforestales (bosque secundario- BS, tala y quema-TQ y sistema conservacionista Quesungual-SAQ). Se utilizaron datos de 15 parcelas de 200 m2 ubicadas entre 14° 05' N y 88° 30' W y transformicidades reportadas en otros estudios. Los mayores valores de emergĂa se presentaron en la variable Lluvia (1.35E15 sej/ha por año) y las mayores diferencias de emergĂa entre sistemas se observaron en suelo erosionado, especialmente en TQ, BS y SAQ tuvieron mayor RazĂłn de Carga Ambiental que TQ (0.63, 0.14 y 0.02, respectivamente). El sistema TQ presenta el valor mĂĄs alto del Ăndice de Huella EcolĂłgica seguido por SAQ y BS. El Ăndice de Sostenibilidad de EmergĂa del sistema TQ fue 34.8, el de SAQ = 135.6 y el de BS = 4123.8, con mayores valores de sostenibilidad en el SAQ y el BS, lo cual indica que son sistemas que favorecen el uso de recursos renovables y locales.Resource use and sustainability of three agroforestry systems (Secondary Woods â BS; Fell and Burn â TQ; and Quesungal Conservation mode â SAQ) were evaluated by analyzing data from fifteen 200 m2 plots (14° 05' N; 88° 30' W), making use of transformity values reported in other related studies. The highest emergy values were observed for the variable rain (1.35E15 sej/ha per year); and the largest emergy differences were found in eroded soils, especially those of TQ. BS and SAQ exhibited a greater Environmental Load Ratio than TQ (0.63, 0.14 and 0.02, respectively). TQ showed the largest Ecological Footprint Index value, followed by SAQ and BS. Emergy Sustainability Index for TQ was 34.8, whereas SAQ and BS reached respective values of 135.6 and 4,123.8. The latter two data, as compared to the former, reveal how these systems (SAQ and BS) favor the use of local renewable resources
Development of a Mesoamerican intra-genepool genetic map for quantitative trait loci detection in a drought tolerant Ă susceptible common bean (Phaseolus vulgaris L.) cross
Drought is a major constraint to common bean (Phaseolus vulgaris L.) production, especially in developing countries where irrigation for the crop is infrequent. The Mesoamerican genepool is the most widely grown subdivision of common beans that include small red, small cream and black seeded varieties. The objective of this study was to develop a reliable genetic map for a Mesoamerican Ă Mesoamerican drought tolerant Ă susceptible cross and to use this map to analyze the inheritance of yield traits under drought and fully irrigated conditions over 3 years of experiments. The source of drought tolerance used in the cross was the cream-seeded advanced line BAT477 crossed with the small red variety DOR364 and the population was made up of recombinant inbred lines in the F5 generation. Quantitative trait loci were detected by composite interval mapping for the traits of overall seed yield, yield per day, 100 seed weight, days to flowering and days to maturity for each field environment consisting of two treatments (irrigated and rainfed) and lattice design experiments with three repetitions for a total of six environments. The genetic map based on amplified fragment length polymorphism and random amplified polymorphic DNA markers was anchored with 60 simple sequence repeat (SSR) markers and had a total map length of 1,087.5 cM across 11 linkage groups covering the whole common bean genome with saturation of one marker every 5.9 cM. Gaps for the genetic map existed on linkage groups b03, b09 and b11 but overall there were only nine gaps larger than 15 cM. All traits were inherited quantitatively, with the greatest number for seed weight followed by yield per day, yield per se, days to flowering and days to maturity. The relevance of these results for breeding common beans is discussed in particular in the light of crop improvement for drought tolerance in the Mesoamerican genepool
The urgent need for integrated science to fight COVID-19 pandemic and beyond
The COVID-19 pandemic has become the leading societal concern. The pandemic has shown that the public health
concern is not only a medical problem, but also afects society as a whole; so, it has also become the leading scientifc
concern. We discuss in this treatise the importance of bringing the worldâs scientists together to fnd efective soluâ
tions for controlling the pandemic. By applying novel research frameworks, interdisciplinary collaboration promises to
manage the pandemicâs consequences and prevent recurrences of similar pandemics
Residual effect of BNI by Brachiaria humidicola pasture on nitrogen recovery and grain yield of subsequent maize
Interaction of aluminium and drought stress on root growth and crop yield on acid soils
Genotypic differences in symbiotic nitrogen fixation ability and seed yield of climbing bean
Climate-Smart Livestock Systems: An Assessment of Carbon Stocks and GHG Emissions in Nicaragua
The urgent need for integrated science to fight COVID-19 pandemic and beyond
The COVID-19 pandemic has become the leading societal concern. The pandemic has shown that the public health
concern is not only a medical problem, but also afects society as a whole; so, it has also become the leading scientifc
concern. We discuss in this treatise the importance of bringing the worldâs scientists together to fnd efective soluâ
tions for controlling the pandemic. By applying novel research frameworks, interdisciplinary collaboration promises to
manage the pandemicâs consequences and prevent recurrences of similar pandemics