Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia
Due to the demand in biofuel, the plant species that are not eatable and do not compete with traditional crops in Colombia, such as Jatropha curcas L., have become an important option. To produce more knowledge on the growth of this species, the research was carried out with different amounts of N a...
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Centro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de Colombia
2017-05-01
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doaj-b9dd0e9b90464a2297e763c1d8a491162020-11-24T21:45:09ZengCentro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de ColombiaAgronomía Colombiana0120-99652357-37322017-05-0135222323110.15446/agron.colomb.v35n2.6658147214Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of ColombiaOmar Montenegro R.0Stanislav Magnitskiy1Liz Patricia Moreno2Aquiles Enrique Darghan3Colombian Agricultural Research Corporation (Corpoica). Nataima (Colombia).Faculty of Agricultural Sciences, Universidad Nacional de Colombia. Bogota (Colombia).Faculty of Agricultural Sciences, Universidad Nacional de Colombia. Bogota (Colombia).Faculty of Agricultural Sciences, Universidad Nacional de Colombia. Bogota (Colombia).Due to the demand in biofuel, the plant species that are not eatable and do not compete with traditional crops in Colombia, such as Jatropha curcas L., have become an important option. To produce more knowledge on the growth of this species, the research was carried out with different amounts of N and K fertilizers applied during the first 435 days after sowing (das) under dry tropical forest conditions. With the highest N dose (150 kg ha-1), the largest leaf area index was obtained in all evaluation period. The highest net assimilation rate (NAR) values were seen in the treatment with 150 kg ha-1 of N at 75 das, 1.852 g m-2 d-1, with no differences presented among the treatments with fertilizer application. The highest absolute growth rate (AGR) was observed when 150 kg ha-1 of N+180 kg ha-1 of K2O were applied at the start of the reproductive phase (345 das), 24.5 g d-1. The specific leaf area (SLA) did not present a response to the treatments. The relative growth rate (RGR) reached zero value at 402 das for the plants without fertilizers. The accumulation of biomass in J. curcas was influenced by the fertilizers with N and K, presenting rapid initial vegetative growth (first 165 das) which decreased with the starting of the reproductive phase.https://revistas.unal.edu.co/index.php/agrocol/article/view/66581assimilation ratedry massgrowth indicesEuphorbiaceae. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Omar Montenegro R. Stanislav Magnitskiy Liz Patricia Moreno Aquiles Enrique Darghan |
spellingShingle |
Omar Montenegro R. Stanislav Magnitskiy Liz Patricia Moreno Aquiles Enrique Darghan Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia Agronomía Colombiana assimilation rate dry mass growth indices Euphorbiaceae. |
author_facet |
Omar Montenegro R. Stanislav Magnitskiy Liz Patricia Moreno Aquiles Enrique Darghan |
author_sort |
Omar Montenegro R. |
title |
Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia |
title_short |
Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia |
title_full |
Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia |
title_fullStr |
Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia |
title_full_unstemmed |
Growth of <i>Jatropha curcas</i> L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia |
title_sort |
growth of <i>jatropha curcas</i> l. fertilized with nitrogen and potassium under conditions of dry tropical forest of colombia |
publisher |
Centro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de Colombia |
series |
Agronomía Colombiana |
issn |
0120-9965 2357-3732 |
publishDate |
2017-05-01 |
description |
Due to the demand in biofuel, the plant species that are not eatable and do not compete with traditional crops in Colombia, such as Jatropha curcas L., have become an important option. To produce more knowledge on the growth of this species, the research was carried out with different amounts of N and K fertilizers applied during the first 435 days after sowing (das) under dry tropical forest conditions. With the highest N dose (150 kg ha-1), the largest leaf area index was obtained in all evaluation period. The highest net assimilation rate (NAR) values were seen in the treatment with 150 kg ha-1 of N at 75 das, 1.852 g m-2 d-1, with no differences presented among the treatments with fertilizer application. The highest absolute growth rate (AGR) was observed when 150 kg ha-1 of N+180 kg ha-1 of K2O were applied at the start of the reproductive phase (345 das), 24.5 g d-1. The specific leaf area (SLA) did not present a response to the treatments. The relative growth rate (RGR) reached zero value at 402 das for the plants without fertilizers. The accumulation of biomass in J. curcas was influenced by the fertilizers with N and K, presenting rapid initial vegetative growth (first 165 das) which decreased with the starting of the reproductive phase. |
topic |
assimilation rate dry mass growth indices Euphorbiaceae. |
url |
https://revistas.unal.edu.co/index.php/agrocol/article/view/66581 |
work_keys_str_mv |
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