Effects of Fertilization Ratios on the Growth of Pinto Peanut (Arachis Pintoi) under Drought Stress Conditions

Abstract

The objectives of this study were to evaluate the effects of different fertilization ratios on the growth of pinto peanut (Arachis pintoi) propagated vegetatively under varying water regimes. The experiment was carried out in a net-house in a completely randomized design with three replicates. The N:P2O5:K2O ratios were applied at six levels: F1 (1:1:1), F2 (1:3:1), F3 (1:1:3), F4 (3:1:1), F5 (3:3:1), and F6 (3:3:3) while soil moisture included three different levels: 30% (W1), 60% (W2), and 100% (W3) field capacity. Water stress conditions were treated from 30-65 days after planting, and then the pots were irrigated to 100% field capacity. The results indicate that drought conditions significantly reduced (P<0.05) the growth of stolons, leaf appearance, number of secondary stolons, and dry matter, while the root/shoot ratio was higher compared to plants under well-watered conditions. There was no significant effect of the fertilization ratios on the number of secondary stolons. Higher-NP and NPK application ratios showed significant influences on the growth of A. pintoi under drought conditions by stimulating stolon lengths and the number of leaves, while the root/shoot ratio was decreased. Higher ratios of single fertilizers (N, P, or K) did not show a consistent effect on the growth of A. pintoi under drought conditions. The results suggest that a higher-NP fertilization ratio stimulates the growth of A. pintoi under both drought and well-irrigated conditions.

Intercropping Pinto Peanut in Litchi Orchard Effectively Improved Soil Available Potassium Content, Optimized Soil Bacterial Community Structure, and Advanced Bacterial Community Diversity

“…Arachis pintoi , also known as the Pinto peanut, is a tropical and subtropical leguminous perennial creeping herbaceous plant (Zhang et al, 2021 ). Some studies have shown that it is an excellent intergrowth plant in ecological orchard that can improve not only microclimate and control weed growth but also fruit quality (Vu et al, 2019 ; Phan et al, 2021 ).…”

Characterization of the complete chloroplast genome of Arachis pintoi Krapov. & W.C.Greg., a perennial leguminous forage

“…Due to its fast growth rate, long flowering period and high fresh grass yield, A. pintoi can be utilized in pure stands under grazing as cut-and-carry forage or as artificial ornamental lawns (Vu et al. 2019 ). In addition, A. pintoi has high crude protein content, good palatability, dense underground rhizomes, abundant nodules, as well as strong barren and trampling resistance (Lascano and Thomas 1988 ).…”