Morphogenetic, physiological, and productive of forage peanut responses to shading

Abstract

The objective of this work was to evaluate the morphogenetic, structural, physiological, and productive traits of forage peanut (Arachis pintoi) subjected to different levels of artificial shading in the field. The 'Amarillo MG-100' forage peanut was planted in April 2015, and the evaluations were carried out from May 2017 to April 2018. The treatments were: 0, 30, 45, and 75% of artificial shading. There was no significant effect of shading on the morphogenetic traits of forage peanut. Shading increased final leaf length and canopy height and decreased the leaf area index and number of stolons. Photosynthesis, transpiration rate, stomatal conductance, chlorophyll b, and leaf temperature increased quadratically as a function of shading. There was a linear positive effect on the growing cycle length and a quadratic effect on the production of dry matter mass, with the maximum at 30% shade. Forage peanut harvested at 95% light interception (11-cm height) shows adaptation to shading up to 45%, with increased leaf size, canopy height, photosynthetic rate, stomatal conductance, transpiration rate, and chlorophyll b. In addition, plants at 30% shading show a higher yield than those growing under full sun.

Effect of Light Intensity on Morphology, Photosynthesis and Carbon Metabolism of Alfalfa (Medicago sativa) Seedlings

“…It is possible that increased leaf growth (source) drives root growth (sink) and thus increases the ability of plants to acquire more water and nutrients, which could be an optimal way to maintain a source-sink balance under high-light conditions [30]. Our results also are in agreement with previous research on peanut (Arachis pintoi) [31], suggesting that plants allocate more resources to the part that is acquiring the resource that is currently the most limiting [32]. In addition, the morphological differences in alfalfa seedlings undergoing different light treatments may be due to alterations in the molecular regulation networks or endogenous plant hormones [33,34], which deserve further investigation.…”

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the brazilian cerrado

“…When evaluating forage management heights in each year of evaluation it was observed that the soil of plants managed at 50 cm presents higher values of S and P. Possibly, this occurs because plants managed at this height result in greater ow of forage tissues returning to the environment. This is because forage plants grown under shading exhibit strategies to compensate for reduced RFA in the understory, such as stem and leaf elongation; increases in chlorophylls, water use e ciency, leaf life span, and plant height, in uencing their management (Cruz et al, 2021;Cruz et al, 2020;Machado et al, 2020).…”