Yield and resource use efficiency of Plukenetia volubilis plants at two distinct growth stages as affected by irrigation and fertilization

Abstract

This study is to test how seedlings (vegetative) and large plants (reproductive) of an oilseed crop (Plukenetia volubilis) responded to regulated deficit irrigation techniques (conventional deficit irrigation, DI; alternative partial root-zone irrigation, APRI) in a tropical humid monsoon area. Seedlings were more sensitive to water deficit than large plants. Although APRI did better than DI in saving water for both seedlings and large plants at the same amount of irrigation, full irrigation (FI) is optimal for faster seedling growth at the expense of water-use efficiency (WUE). The seed number per unit area was responsible for the total seed oil yield, largely depending on the active process of carbon and nitrogen storages at the whole-plant level. The magnitude of the increase in total seed and seed oil yield by fertilization was similar under different irrigation regimes. Compared with FI, DI can save water, but reduced the total seed yield and had lower agronomic nutrient-use efficiency (NUEagr); whereas APRI had similar total seed yield and NUEagr, but reduced water use greatly. Although the dual goal of increasing the yield and saving water was not compatible, maintaining a high yield and NUEagr at the cost of WUE is recommended for P. volubilis plantation in t he water-rich areas.

Phytochemical Screening and Antioxidant Activities of the Seedling Extracts from Inca Peanut Plukenetia volubilis

“…It has a high potential for replacing illicit crops and the establishment of commercial plantations generate positive environmental impacts because it could be install on degraded soils 26 . Its grows on the tropical humid monsoon regions where annual rainfall is high and the wettingdrying cycles resulted in temporal changes in soil structure 27 . The parameter of seedling germination was approximately stimulated by vermiculite, continuous light, and 30 °C temperature 28 .…”

Sacha inchi (Plukenetia volubilis L.) – An Underutilized Crop With a Great Potential

“…Fruit can be produced up to at least 1490 m altitude, but yield declines above 900 m [62]. Total biomass and fruit mass are significantly increased by dry-season irrigation, although seed quality and oil composition are maintained during drought [63,64]. The average yield varies between approximately 150-750 kg ha −1 depending on the season and the applied irrigation and fertilization schemes [64].…”

“…Plantations are typically established from seeds and anthesis occurs approximately 3-5 months after planting, while fruit maturation occurs after approximately 8-9 months [60,65,66]. Pollination is primarily allogamous, although a small amount of autogamy (approximately 4%) may occur [64,67]. As an alternative to the establishment from seeds, P. volubilis can be propagated vegetatively by supplying cuttings with auxin or by grafting to a rootstock.…”

Gibberellic acid increases the yield of adult plants of sacha inchi (Plukenetia volubilis)

“…---------co meses después de la siembra, floreciendo y fructificando durante toda la temporada de crecimiento (Cai, 2011). El riego en la estación seca es necesario para aumentar el potencial de rendimiento porque las plantas cultivadas en condiciones de sequía natural desarrollan un menor número de flores femeninas y presentan un mayor aborto de frutos en comparación con las plantas bien regadas (Jiao et al, 2012;Gong et al, 2018). La cosecha de sacha inchi inicia 8 meses después de la siembra y se realiza cada 15 días, por lo que la producción constante de semillas requiere la aplicación de altas Considerando la importancia del sacha inchi para el desarrollo económico de la Amazonía Peruana y las investigaciones previas realizadas en el cultivo, el objetivo de este estudio fue evaluar el efecto del ácido giberélico en el rendimiento de plantas adultas de sacha inchi.…”