| dc.contributor | | en-US |
| dc.creator | De Grazia, J. | |
| dc.creator | Tittonell, Pablo A. | |
| dc.creator | Chiesa, Angel | |
| dc.date | 2007-09-01 | |
| dc.date.accessioned | 2021-01-18T16:30:34Z | |
| dc.date.available | 2021-01-18T16:30:34Z | |
| dc.identifier | https://www.rcia.uc.cl/index.php/ijanr/article/view/398 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/162016 | |
| dc.description | Fast-growing seedlings have larger immediate nutrient demands as compared with adult plants. A tray experiment was conducted to evaluate the fertilization of sweet pepper transplants growing on different substrates [Control (60% Sphagnum peat + 40% perlite), Mix I (45% Sphagnum peat + 30% perlite + 25% farmyard compost), Mix II (30% Sphagnum peat + 20% perlite + 50% farmyard compost), and Commercial (40% compost + Sphagnum peat + perlite + vermiculite)] with weekly applications of nitrogen N at rates of 150 and 300 mg·L-1, compared to a control without fertilization. Seedlings were transplanted in a randomized, complete block design with four replications. Leaf area and fresh and dry weights of leaves, stems and roots were measured for the transplants; the leaf weight ratio, specific leaf area, absolute and relative growth rates, leaf expansion rates, leaf area duration, and net assimilation rate were calculated. Precocity, early yield, and total yield were measured for the fi eld crop. The application of nitrogen had positive effects on most growth parameters of seedlings growing on substrates with compost, promoting increased precocity and yield in the transplanted crop. Few benefits from nitrogen fertilization were observed for seedlings growing on substrates without compost. The main effect of the latter is to improve the efficiency of capture of the applied nitrogen, due to better water retention and ion-exchange capacity. Los plantines presentan elevada demanda de nutrientes como resultado de su alta tasa de crecimiento en relación a las plantas adultas. Para evaluar la adición de nitrógeno a sustratos preparados con y sin materiales compostados en la producción de pimiento, se realizó un ensayo fertilizando plantines cultivados en diferentes sustratos: Testigo (60% turba de Sphagnum + 40% perlita), Mezcla I (45% turba de Sphagnum + 30% perlita + 25% material vegetal compostado), Mezcla II (30% turba de Sphagnum+ 20% perlita + 50% material vegetal compostado) y un sustrato Comercial (turba de Sphagnum + 40% compost + perlita + vermiculita) con 150 y 300 mg·L-1 de nitrógeno por semana, manteniendo un testigo sin fertilizar. Los plantines fueron transplantados en invernadero según un diseño de bloques completos aleatorizados con cuatro repeticiones. Previo al transplante se determinó área foliar, pesos fresco y seco de hoja, tallo y raíz, se calculó la proporción areal de hojas, área foliar específi ca, tasas de crecimiento absolutas y relativas en fresco y en seco, tasa de expansión foliar absoluta y relativa, duración del área foliar y tasa de asimilación neta de los plantines. En el cultivo se determinó precocidad, rendimiento precoz y total. La fertilización nitrogenada de la mezcla de sustrato testigo fue insuficiente para que los plantínes alcanzaran los valores obtenidos al cultivarlos en las mezclas de sustratos con compost. Por lo tanto, es posible que el principal efecto benéfico de los materiales compostados sea disminuir la lixiviación de nutrientes desde la matriz del sustrato gracias a la mayor retención hídrica y al aumento de la capacidad de intercambio de iones. | en-US |
| dc.format | | |
| dc.language | eng | |
| dc.publisher | Pontificia Universidad Católica de Chile | en-US |
| dc.relation | https://www.rcia.uc.cl/index.php/ijanr/article/view/398/313 | |
| dc.source | International Journal of Agriculture and Natural Resources; Vol 34, No 3 (2007); 151-160 | en-US |
| dc.source | International Journal of Agriculture and Natural Resources; Vol 34, No 3 (2007); 151-160 | es-ES |
| dc.source | 2452-5731 | |
| dc.source | 2452-5731 | |
| dc.subject | | en-US |
| dc.subject | Capsicum annuum, compost, early yield, growing medium, leaf area, nitrogen, seedling, Area foliar, compost, medio de crecimiento, nitrógeno, rendimiento precoz, transplante. | en-US |
| dc.title | The effect of substrates with compost and nitrogenous fertilization on photosynthesis, precocity and pepper (Capsicum annuum) yield. Cien. Inv. Agr. (In English) 34(3): 151-160. | en-US |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | | en-US |
| dc.type | | es-ES |
