Dry matter accumulation and potato productivity with green manure

Abstract

Growth patterns and distribution of dry matter in different parts of potato plants (Solanum tuberosum, Solanaceae) with green manure can be positively influenced by the use of green manure. The aim was to evaluate the dry matter accumulation and productivity of potato with varying quantities of sunn hemp, Crotalaria juncea (Fabaceae) as a nitrogen source. The experiment used three different amounts of sunn hemp, equivalent to 100, 200 and 400 Kg ha -1 nitrogen (N), the recommended mineral N dose (250 Kg ha -1 ), and a treatment with zero N. Sampling was carried out at 35, 50, 65 and 80 days after planting, representing the subplots. The treatments were arranged in a randomized block design with split plot, the plot were enlarged fertilization and the small plot sampling dates. Four replications were used. Dry matter accumulation in the shoots of potato was greater with sunn hemp than with mineral nitrogen. The accumulation of dry matter in tubers and in the whole plant increased over time at higher rates of sunn hemp than with mineral fertilizer. Commercial and total potato productivity increased with sunn hemp quantity. Green manure at higher rates (400 and 200 Kg ha -1 ) increased the accumulation of dry matter in potato aboveground parts and in tubers. The commercial productivity of potato was 24% greater with green manure than with mineral fertilizers, indicating the potential of sunn hemp to provide adequate quantities of nitrogen for the growth and development of this crop.Key words: Crotalaria juncea, harvest index, nitrogen, Solanum tuberosum. RESUMEN Los patrones de crecimiento y la distribución de materia seca en las diferentes partes de la planta de papa Solanum tuberosum (Solanaceae) pueden ser influenciados positivamente por la utilización de abono verde. El objetivo del trabajo fue evaluar la acumulación de materia seca y el rendimiento de papa con diferentes dosis de

Accumulation of macronutrients and productivity of potato with foliar application of biofertilizer

“…1B), which demonstrated the effect of this treatment on the N accumulations in these organs. Mohamed et al (2017) found that the response to green manure was greater than that of mineral fertilizers, with higher N accumulations in potato at higher sun hemp doses, which were related to the rapid mineralization and N release of the green manure tissues (Watthier et al, 2020).…”

“…Studies have reported increases in productivity and improvements in the quality of tubers from the use of BF applications when compared to the application of only chemical fertilizers for the Atlantic and Agata cultivars (Cardoso et al, 2015;Cardoso et al, 2017). Mohamed et al (2017) found that the productivity of potatoes was 24% greater with green manure than with mineral fertilization, which indicated the potential of alternative fertilizers to provide nitrogen for the growth and development of potato.…”

Partition of biomass and nitrogen in a potato crop under three nitrogen fertilization treatments

“…Nevertheless, research on ecophysiological responses of potato cultivars in the tropical Andes is limited. These types of studies and results can be better used as indicators of sustainability of potato farming systems, in which the reduction and substitution of mineral fertilizers by organic fertilizers may be possible to maintain or increase yield (Tiemens-Hulscher et al, 2014, Ohamed et al, 2017.…”

“…The N effect on tuber yield has been well demonstrated (Alva et al, 2002;Maltas et al, 2018). Howe-ver, the potato growth response depends largely on the nitrogen availability in the soil, which may have a considerable effect on the partitioning of assimilates and nitrogen to the different plant organs (Silva et al, 2013;Goméz et al, 2017;Ohamed et al, 2017). This balance of the distribution of biomass and nitrogen to the different compartment may have significant effects on tuber production (Machado & Sarmiento, 2012;Silva et al, 2013).…”

Interacción nitrato/potasio en la solución nutritiva y el rendimiento de papa en hidroponía

“…Sin embargo, los factores NO3 -/aniones y K + /cationes afectaron (p≤ 0.05) el índice de cosecha (IC) (Cuadro 9). Las relaciones 60 y 80/100 NO3 -/aniones en la SN redujeron significativamente el IC comparado con la relación 40/100 NO3 -/aniones, atribuido a un retraso en la formación del tubérculo y a una disminución en su crecimiento (Allison et al, 2001), provocado por una elevada fertilización nitrogenada (Vos, 1997), lo que redujo la translocación de C a las hojas y tubérculos y aumentó el flujo de este elemento a las hojas jóvenes, en lugar de los tubérculos (Mohamed et al, 2017). Con las relaciones 35 y 55/100 K + /cationes se obtuvieron los mayores IC (0.4 y 0.38), mientras que el menor IC (0.3) fue obtenido con 15/100 K + /cationes, lo cual implica que las plantas desarrolladas con 35 y 55/100 K + /cationes en la SN destinaron una mayor proporción de asimilados al tubérculo, lo que coincide con Singh y Lal (2012).…”