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Cactus pears face challenges due to global climate change, which is leading to in-depth research to monitor and increase their water activity. The objective of this study was to evaluate the use of the natural test hydrogel (TH) from Orbignya phalerata fibre as nutrients and water for growing cactus pear genotypes ("Baiana" and "Doce" [ Nopalea cochenillifera ], 'Gigante' [ Opuntia fícus-indica ], and "Mexican Elephant Ear" [ Opuntia stricta ]) compared to the use of commercial hydrogel (CH), which is based on polymers composed of polyacrylamide, and a treatment without the use of hydrogel (WH). A completely randomized design was used, in a factorial scheme (4 × 3), with four genotypes of cactus pear and three forms of hydration, with five replications. The number and area of cladode was greatest ( p &lt; 0.01) in plants with CH and TH irrigation-fertilization in the 'Doce' cactus genotype. The dry biomass of the cladode and root in the 'Gigante' cactus genotype was greatest ( p &lt; 0.01) in the treatments with CH and TH irrigation-fertilisation. The 'Baiana', 'Doce', and 'Gigante' cactus genotypes exhibited more ( p &lt; 0.01) dry matter content with the TH irrigation-fertilisation. The highest ( p &lt; 0.01) neutral detergent fibre content was observed in the 'Baiana' and 'Doce' cactus genotypes when irrigation occurred with WH treatment, and the highest acid detergent fibre content in the 'Gigante' genotype. The copolymerized natural fibre from the mesocarp of Orbignya phalerata (babassu fruit) induced a better growth and chemical composition of cactus pear genotypes than the hydrogel based on polymers composed of polyacrylamide.

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears