Efficient and responsive table cassava cultivars to the use of phosphorus

Silveira, Flávio P. da M.; Lopes, Welder de A. R.; Santos, Gisele L. dos; Santos, Manoel G. dos; Barboza, Michele; Silva, José A. da; Silveira, Lindomar M. da; Barros Júnior, Aurélio P.

doi:10.1590/1983-21252024v3712541rc

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Scientific Article • Rev. Caatinga 37 • 2024 • https://doi.org/10.1590/1983-21252024v3712541rc copy

Efficient and responsive table cassava cultivars to the use of phosphorus

Cultivares de mandioca de mesa eficientes e responsivas ao uso do fósforo

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Table cassava cultivars efficient in the use of phosphorus (P) and responsive to phosphate fertilization represent a crop option for regions with low availability of the nutrient and for crops using technological packages, such as investment in fertilization. The objective of the study was to classify table cassava cultivars regarding efficiency and responsiveness to P application in two agricultural crops. For this, four table cassava cultivars (Água Morna, BRS Gema de Ovo, Recife and Venâncio) were evaluated under conditions of low P availability (and without phosphate fertilization) and high availability (and fertilized with 240 kg ha^-1 of P₂O₅). The Água Morna cultivar proved to be efficient and responsive in the two harvests evaluated. Only the Venâncio cultivar was classified as non-efficient. There was variation in the response of the Recife cultivar between the crops evaluated.

Keywords:
Manihot esculenta Cranz; Phosphate fertilizer; Efficiency; Responsiveness

Depth	pH	P^* *Extractor: Mehlich-1.	K⁺	Na⁺	Ca²⁺	Mg²⁺	Sand	Silt	Clay
m		mg dm^-3			cmolc dm^-3		kg kg^-1
1^st Crop (2018/19)
0-0.20	5.90	8.3	38.9	1.2	0.80	0.50	0.91	0.02	0.07
0.20-0.40	5.50	2.0	50.8	1.2	0.70	0.20	0.88	0.03	0.09
2^nd Crop (2019/20)
0-0.20	5.90	3.7	41.1	9.3	0.60	0.20	0.91	0.02	0.07
0.20-0.40	4.90	0.9	24.3	8.3	0.50	0.10	---	---	---

Season	Cultivar	Root productivity
		0 kg P₂O₅ ha^-1	240 kg P₂O₅ ha^-1
		kg ha^-1
2018/2019	Água Morna	48,498	47,153
	BRS Gema de Ovo	48,965	39,885
	Recife	56,960	42,685
	Venâncio	10,160	21,388
Media		41,146	37,778
2019/2020	Água Morna	44,185	64,253
	BRS Gema de Ovo	47,865	40,688
	Recife	45,088	53,220
	Venâncio	20,630	39,715
Media		39,442	49,469

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[1] *Corresponding author: <flaviopms@hotmail.com>