Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador
In the high Andes of Ecuador, although expanding agricultural practices and overgrazing have had negative impacts on soil fertility, few investigations have been conducted to identify which practices are most likely to reduce fertility. Quinoa (Chenopodium quinoa Willd.) was grown in soils from nati...
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| Format: | Article |
| Language: | English |
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Universidad Politécnica Salesiana
2016-10-01
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| Series: | La Granja: Revista de Ciencias de la Vida |
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| Online Access: | https://revistas.ups.edu.ec/index.php/granja/article/view/1350 |
| _version_ | 1818912876754108416 |
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| author | Gustavo Chacón Daniel Gagnon David Paré |
| author_facet | Gustavo Chacón Daniel Gagnon David Paré |
| author_sort | Gustavo Chacón |
| collection | DOAJ |
| description | In the high Andes of Ecuador, although expanding agricultural practices and overgrazing have had negative impacts on soil fertility, few investigations have been conducted to identify which practices are most likely to reduce fertility. Quinoa (Chenopodium quinoa Willd.) was grown in soils from native forests, Nf; pastures, Pa; Eucalyptus globulus Labill. plantations, Eg; and Pinus patula Schlecht. plantations, Pp. A bioassay study was conducted using a randomized block design with control (C), ammonium nitrate (N), triple superphosphate (P), and combined N and P (N+P) fertilizer treatments. On soils from Pp, quinoa mortality was 100% in N, 88% in C, 63% in N+P and 0% in P; P enhanced growth the most; quinoa biomass attained only 0.1 g/pot and had a P content of 0.7 mg/pot. N+P enhanced quinoa growth the most on soils from Nf, Pa and Eg. Here, quinoa biomass (g/pot) averaged 0.1 in C, 0.4 in N, 1.6 in P and 7.2 in N+P; P content (mg/pot) averaged 0.9 in C, 0.6 in N, 12 in P and 38 in N+P. In all soils, PO4- was the principal limiting factor. K deficiencies and Al toxicity probably occurred only in Pp soils. This study suggests that the studied soils cannot support production of quinoa crops without additions of combined fertilizers containing P and K as the principal elements. Pp have the least fertile soils, presumably resulting from a longer history of use after pasturing in addition to the pine effect itself. |
| first_indexed | 2024-12-19T23:21:34Z |
| format | Article |
| id | doaj.art-c0d5b28e34454b02aeb547befd496cf1 |
| institution | Directory Open Access Journal |
| issn | 1390-3799 1390-8596 |
| language | English |
| last_indexed | 2024-12-19T23:21:34Z |
| publishDate | 2016-10-01 |
| publisher | Universidad Politécnica Salesiana |
| record_format | Article |
| series | La Granja: Revista de Ciencias de la Vida |
| spelling | doaj.art-c0d5b28e34454b02aeb547befd496cf12022-12-21T20:01:57ZengUniversidad Politécnica SalesianaLa Granja: Revista de Ciencias de la Vida1390-37991390-85962016-10-0124210.17163/lgr.n24.2016.02Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern EcuadorGustavo Chacón0Daniel Gagnon1David Paré2Universidad del AzuayUniversity of ReginaNatural Resources Canada, Canadian Forest Service, Laurentian Forestry CentreIn the high Andes of Ecuador, although expanding agricultural practices and overgrazing have had negative impacts on soil fertility, few investigations have been conducted to identify which practices are most likely to reduce fertility. Quinoa (Chenopodium quinoa Willd.) was grown in soils from native forests, Nf; pastures, Pa; Eucalyptus globulus Labill. plantations, Eg; and Pinus patula Schlecht. plantations, Pp. A bioassay study was conducted using a randomized block design with control (C), ammonium nitrate (N), triple superphosphate (P), and combined N and P (N+P) fertilizer treatments. On soils from Pp, quinoa mortality was 100% in N, 88% in C, 63% in N+P and 0% in P; P enhanced growth the most; quinoa biomass attained only 0.1 g/pot and had a P content of 0.7 mg/pot. N+P enhanced quinoa growth the most on soils from Nf, Pa and Eg. Here, quinoa biomass (g/pot) averaged 0.1 in C, 0.4 in N, 1.6 in P and 7.2 in N+P; P content (mg/pot) averaged 0.9 in C, 0.6 in N, 12 in P and 38 in N+P. In all soils, PO4- was the principal limiting factor. K deficiencies and Al toxicity probably occurred only in Pp soils. This study suggests that the studied soils cannot support production of quinoa crops without additions of combined fertilizers containing P and K as the principal elements. Pp have the least fertile soils, presumably resulting from a longer history of use after pasturing in addition to the pine effect itself.https://revistas.ups.edu.ec/index.php/granja/article/view/1350agricultural potentialnutrient deficiencyvolcanic soils |
| spellingShingle | Gustavo Chacón Daniel Gagnon David Paré Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador La Granja: Revista de Ciencias de la Vida agricultural potential nutrient deficiency volcanic soils |
| title | Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador |
| title_full | Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador |
| title_fullStr | Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador |
| title_full_unstemmed | Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador |
| title_short | Quinoa biomass production capacity and soil nutrient deficiencies in pastures, tree plantations and native forests in the Andean Highlands of Southern Ecuador |
| title_sort | quinoa biomass production capacity and soil nutrient deficiencies in pastures tree plantations and native forests in the andean highlands of southern ecuador |
| topic | agricultural potential nutrient deficiency volcanic soils |
| url | https://revistas.ups.edu.ec/index.php/granja/article/view/1350 |
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