Author:
de Faria Melo Cíntia Cármen,Amaral Danilo Silva,de Moura Zanine Anderson,de Jesus Ferreira Daniele,de Mello Prado Renato,de Cássia Piccolo Marisa
Abstract
AbstractPhosphorus (P) imbalances are a recurring issue in cultivated soils with pastures across diverse regions. In addition to P deficiency, the prevalence of excess P in soil has escalated, resulting in damage to pasture yield. In response to this reality, there is a need for well-considered strategies, such as the application of silicon (Si), a known element for alleviating plant stress. However, the influence of Si on the morphogenetic and chemical attributes of forage grasses grown in various soils remains uncertain. Consequently, this study aimed to assess the impact of P deficiency and excess on morphogenetic and chemical parameters, as well as digestibility, in Zuri guinea grass cultivated in Oxisol and Entisol soils. It also sought to determine whether fertigation with nanosilica could mitigate the detrimental effects of these nutritional stresses. Results revealed that P deficiency led to a reduction in tiller numbers and grass protein content, along with an increase in lignin content. Conversely, P excess resulted in higher proportions of dead material and lignin, a reduced mass leaf: stem ratio in plants, and a decrease in dry matter (DM) yield. Fertigation with Si improved tillering and protein content in deficient plants. In the case of P excess, Si reduced tiller mortality and lignin content, increased the mass leaf:stem ratio, and enhanced DM yield. This approach also increased yields in plants with sufficient P levels without affecting grass digestibility. Thus, Si utilization holds promise for enhancing the growth and chemical characteristics of forage grasses under P stress and optimizing yield in well-nourished, adapted plants, promoting more sustainable pasture yields.
Funder
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil
Publisher
Springer Science and Business Media LLC
Reference93 articles.
1. Hou E, Luo Y, Kuang Y, Chen C, Lu X, Jiang L, et al. Global meta-analysis shows pervasive phosphorus limitation of aboveground plant production in natural terrestrial ecosystems. Nat Commun. 2020;11:1–9.
2. Alovisi AMT, Cassol CJ, Nascimento JS, Soares NB, Silva Junior IR, Silva RS, et al. Soil factors affecting phosphorus adsorption in soils of the Cerrado, Brazil. Geoderma Reg. 2020;22:00298.
3. Cardoso AS, Barbero RP, Romanzini EP, Teobaldo RW, Ongaratto F, Fernandes MHMR, et al. Intensification: a key strategy to achieve great animal and environmental beef cattle production sustainability in Brachiaria grasslands. Sustainability. 2020;12:6656.
4. Reid K, Schneider K, Joosse P. Addressing imbalances in phosphorus accumulation in Canadian agricultural soils. J Environ Qual. 2019;48:1156–66.
5. Malhotra H, Vandana, Sharma S, Pandey R. Phosphorus Nutrition: plant growth in response to deficiency and excess. In: Hasanuzzaman M, Fujita M, Oku H, Nahar K, Hawrylak-Nowak B, editors. Plant nutrients and abiotic stress tolerance. Springer Nature. Singapore; 2018. pp. 171–90.