Integrating SEM-PLS and NCA to reveal the mediating role of leaf nutrient status in linking soil nutrient availability and oil palm yield in peatlands

Ireng Darwati; Muchamad Yusron; Joko Purnomo; Rudi Suryadi; Devi Rusmin; Octivia Trisilawati; Edi Yatno; Joko Pitono; Nurjaya; Djajadi; Muhammad Syakir; Eni Fidiyawati; Rr Sri  Hartati

doi:10.17268/sci.agropecu.2026.012

Autores

Ireng Darwati Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-4861-9051
Muchamad Yusron National Research and Innovation Agency
Joko Purnomo Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0009-0001-0523-7328
Rudi Suryadi Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-4990-3150
Devi Rusmin Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-8661-1026
Octivia Trisilawati Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-2753-5289
Edi Yatno Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-4501-4305
Joko Pitono Centro de Pesquisa em Horticultura, Agência Nacional de Pesquisa e Inovação, Indonésia http://orcid.org/0000-0003-4967-077X
Nurjaya Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0009-0000-6824-1992
Djajadi Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0003-0931-4519
Muhammad Syakir Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0002-8185-8783
Eni Fidiyawati Centro de Pesquisa de Culturas Agrícolas, Agência Nacional de Pesquisa e Inovação, Indonésia https://orcid.org/0000-0001-6939-5264
Rr Sri Hartati Research Center for Estate Crops, National Research and Innovation Agency, Indonesia. https://orcid.org/0000-0003-4127-5564

DOI:

https://doi.org/10.17268/sci.agropecu.2026.012

Palavras-chave:

Nível de água subterrânea, dinâmica de nutrientes, palmeira de óleo, solo de turfa, SEM-PLS, NCA

Resumo

A expansão de plantações de dendezeiros para turfeiras representa uma área crítica de estudo, particularmente na compreensão de como a dinâmica de nutrientes e o manejo das águas subterrâneas influenciam a produtividade do dendezeiro. Esta pesquisa foi conduzida em plantações de dendezeiros de pequenos produtores de 8 a 10 anos, cultivadas em solos de turfa na Regência de Bengkalis, Província de Riau. Utilizou-se o delineamento em blocos casualizados, incorporando três tratamentos de lençol freático: A. 40 cm, B. 60 cm e C. 80 cm. As taxas de aplicação de fertilizantes foram: ureia a 2,50 kg/árvore/ano, SP-36 a 2,75 kg/árvore/ano, MOP (KCl) a 2,25 kg/árvore/ano e dolomita a 2 kg/árvore/ano. A análise de dados utilizou uma combinação de Modelagem de Equações Estruturais baseada em Mínimos Quadrados Parciais (SEM-PLS) e Análise de Condição Necessária (NCA). A SEM-PLS identificou vias de suficiência, enquanto a NCA determinou limiares críticos de nutrientes — ou gargalos — necessários para o crescimento e a produtividade ideais. Os resultados indicam que o teor de nutrientes foliares é um intermediário fundamental entre a disponibilidade de nutrientes no solo e a produtividade, sendo um fator essencial no crescimento do dendezeiro. Em contraste, o efeito direto do crescimento da planta sobre a produtividade foi mínimo. O uso combinado da SEM-PLS e da NCA fornece uma estrutura analítica robusta para a compreensão da formação da produtividade e o desenvolvimento de estratégias de manejo de nutrientes para o cultivo de dendezeiro em turfeiras.

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