Maximizing agro-bioeconomic benefits in intercropped systems of radish and lettuce in the semi-arid environment

Lino, Francisca K. K. da S.; Bezerra Neto, Francisco; Santos, Elizangela C. dos; Lima, Jailma S. S. de; Chaves, Aridênia P.; Rodrigues, Gardênia S. de O.; Guerra, Natan M.; Silva, Ítalo N.; Lino, Vitor A. da S.

doi:10.1590/1807-1929/agriambi.v27n2p121-131

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Articles • Rev. bras. eng. agríc. ambient. 27 (2) • Feb 2023 • https://doi.org/10.1590/1807-1929/agriambi.v27n2p121-131 linkcopy

Maximizing agro-bioeconomic benefits in intercropped systems of radish and lettuce in the semi-arid environment¹

Maximização de benefícios agro-bioeconômicos em sistemas consorciados de rabanete e alface em ambiente semiárido

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Radish and lettuce are two crop vegetables that can be intercropped because they are companion cultures that complement each other. Thus, this study aimed to evaluate agro-bioeconomic returns arising from radish-lettuce intercropping in different equitable amounts of hairy woodrose (Merremia aegyptia) and roostertree (Calotropis procera) biomass at different population densities of lettuce, in the semi-arid environment. The experimental design was in randomized blocks, with treatments arranged in a 4 × 4 factorial scheme with four replicates. The first factor consisted of equitable amounts of M. aegyptia and C. procera biomass at doses of 20, 35, 50, and 65 Mg ha^-1 on a dry basis. The second factor comprised four lettuce population densities of 150, 200, 250, and 300 thousand plants ha^-1. The lettuce and radish cultivars planted were ‘Tainá’ and ‘Crimson Gigante’, respectively. Expressive agro-bioeconomic returns from this radish-lettuce intercropping were obtained in the land equivalent ratio (LER) of 2.25, a score of the canonical variable Z of 3.00, net income (NI) of 52,270.48 R$ ha^-1, respectively, in the biomass amount of 65 Mg ha^-1 of the green manures and lettuce population density of 300 thousand plants ha^-1. Also, there was a productive efficiency index (PEI) of 0.96 and a competitive ratio (CR) of 2.61 in the biomass amount of green manure of 65 Mg ha^-1 and lettuce density of 150 thousand plants ha^-1. Using M. aegyptia and C. procera biomass from the Caatinga biome proved to be a viable technology for producers who practice the cultivation of radish and lettuce in intercropping in the semi-arid environment.

Key words:
Raphanus sativus; Lactuca sativa; Merremia aegyptia; Calotropis procera; economic feasibility

HIGHLIGHTS:

Merremia aegyptia and Calotropis procera biomass amounts provide agro-bioeconomic returns in radish-lettuce intercropping.

Increasing population densities of lettuce provide agro-bioeconomic returns in radish-lettuce intercropping.

Using M. aegyptia and C. procera as green manures proves a viable technology for radish-lettuce producers in semi-arid.

Sources of variation	DF	LER	IA	PEI	Z	Ar	Al	CR	AYL
Blocks	3	0.03^ns	0.49^ns	0.05^ns	0.05^ns	0.42^ns	0.42^ns	0.10^ns	0.40^ns
Amounts of M. aegyptia and C. procera biomass (A)	3	4.30**	18.24**	15.04**	45.98**	51.25**	51.25**	43.78**	2.78*
Lettuce population densities (D)	3	126.91**	266.52**	1.53^ns	250.55**	13.14**	13.14**	14.32**	130.17**
A x D	9	0.64^ns	4.70**	0.53^ns	1.53^ns	1.13^ns	1.13^ns	2.92**	1.20^ns
Regression (Response surface)	2	200.41**	71.35**	130.12**	202.46**	31.77**	31.77**	24.99**	237.89**
Error	45	0.01783	0.33401	0.00216	0.01968	0.03196	0.03196	0.01327	0.05401
CV (%)		7.66	12.34	6.39	6.60	26.90	-26.90	5.23	15.14

Sources of variation	DF	GI	NI	RR	PM
Blocks	3	0.08^ns	0.08^ns	0.15^ns	0.10^ns
Amounts of M. aegyptia and C. procera biomass (A)	3	32.10**	5.43**	9.54**	8.90**
Lettuce population densities (D)	3	229.97**	168.72**	126.45**	125.88**
A x D	9	1.55^ns	1.58^ns	1.65^ns	1.22^ns
Regression (Response surface)	2	222.54**	124.21**	71.53**	89.40**
Error	45	20959734	20953794	0.01647	12.72929
CV (%)		6.74	15.95	6.67	7.70

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Unidade Acadêmica de Engenharia Agrícola Unidade Acadêmica de Engenharia Agrícola, UFCG, Av. Aprígio Veloso 882, Bodocongó, Bloco CM, 1º andar, CEP 58429-140, Tel. +55 83 2101 1056 - Campina Grande - PB - Brazil
E-mail: revistagriambi@gmail.com

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[TFN1] *, **, ns - Significant at p ≤ 0.05 and at p ≤ 0.01, and non-significant at p > 0.05 by F test; CV - Coefficient of variation

Maximizing agro-bioeconomic benefits in intercropped systems of radish and lettuce in the semi-arid environment1

Maximização de benefícios agro-bioeconômicos em sistemas consorciados de rabanete e alface em ambiente semiárido

ABSTRACT

HIGHLIGHTS:

Maximizing agro-bioeconomic benefits in intercropped systems of radish and lettuce in the semi-arid environment¹