Determinação dos coeficientes de cultura da alface (Lactuca sativae L.)

Bastos, E. A.; Lunardi, Dalva Martinelli Cury; Andrade, A. S. de; Netto, Antenor de Oliveira Aguiar

doi:10.15809/irriga.1996v1n3p2

Cited by 2 publications

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“…Crop coefficients (Kc) used were obtained by Bastos et al (1996), considering 0.52 for phase I (1 -10 DAT); 0.80 for phase II (11 -25 DAT); and 0.92 for phase III (26 DAT -up to harvest). Irrigation strategies were adopted at 7 DAT in the two cycles, and finished at 35 DAT in the 1 st cycle and at 30 DAT in the 2 nd cycle.…”

Section: Methodsmentioning

confidence: 99%

Nutrient content and accumulation in mini lettuce as a function of fertigation management strategies

et al. 2022

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Determining the amount of nutrients accumulated by crops is an important tool for defining the order in which nutrients are taken up and required. However, the order and amount of accumulated nutrients vary depending on the genetic characteristics of the cultivars, climatic conditions, fertilization, soil and management systems. The aim of this study was to evaluate the influence of irrigation management strategies and doses of nitrogen (N) fertigation on the content and accumulation of macro and micronutrients and the N use efficiency in mini romaine lettuce “Astorga” cultivated in a protected environment, in two consecutive crop cycles. The treatments consisted of three irrigation strategies: continuous irrigation (Cont), intermittent irrigation, with three fractions a day, at 1-hour intervals (Int1); intermittent irrigation, with three fractions a day, at 4-hour intervals (Int2) and two nitrogen doses (100 and 130 kg/ha N), in daily fertigation. Intermittent irrigation management strategies (Int1 and Int2) increased the contents and accumulation of dry matter and N, P, K, Ca, Mg, S, B, Fe, Mn and Zn. The dose of 130 kg/ha N only increased the content and accumulation of P and Mn in the first and second cycles, respectively. In general, lettuce accumulated macronutrients in the following decreasing order: K>N>Ca>P>Mg>S, whereas micronutrients followed the order Fe>Mn>Zn>B>Cu. The treatments Int1, Int2 and 100 kg/ha N optimized the N use efficiency.

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Section: Methodsmentioning

confidence: 99%

Nutrient content and accumulation in mini lettuce as a function of fertigation management strategies

et al. 2022

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Intermittence in irrigation management and nitrogen optimize yield and water use efficiency in baby lettuce

PEREIRA,

SAAD,

CARDOSO

et al. 2023

Span J Agric Res

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Aim of the study: To evaluate the influence of irrigation management strategies and nitrogen (N) on baby lettuce growth, yield, and water use efficiency in a protected environment. Area of study: Botucatu, SP, Brazil. Material and methods: The experiments were conducted in two consecutive cycles, and the treatments corresponded to the combination of irrigation management strategies with N doses. Irrigation strategies comprised 3 possibilities: continuous irrigation (Cont); intermittent irrigation with three irrigation pulses at one-hour intervals (Int1); and intermittent irrigation with irrigation depth split and applied at 7:00, 11:00, and 15:00 h (Int2). Two N doses were evaluated, 100 and 130 kg/ha of N, applied in daily fertigation according to the irrigation management strategies. Main results: Intermittent irrigation strategies (Int1 and Int2) promoted the highest vegetative growth, increased leaf water content, and increased total yield (49.55 and 55.30; 46.83 and 49.50 t/ha) and marketable yield (46.77 and 52.44; 45.11 and 47.17 t/ha) in the first and second cycles, respectively, in addition to optimizing water use efficiency. The N dose of 130 kg/ha increased the total yield (51.61 t/ha), marketable yield (48.98 t/ha), and water use efficiencies of total yield (53.60 kg/m³) and marketable yield (50.88 kg/m³) only in the first crop cycle. Research highlights: The use of intermittence in irrigation management proved to be more efficient in obtaining high yields and maximized the efficiency of use of water as a factor of production.

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Determinação dos coeficientes de cultura da alface (Lactuca sativae L.)

Abstract: Determinação dos coeficientes de cultura da alface (Lactuca sativae L.)

Cited by 2 publications

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Nutrient content and accumulation in mini lettuce as a function of fertigation management strategies

Nutrient content and accumulation in mini lettuce as a function of fertigation management strategies

Intermittence in irrigation management and nitrogen optimize yield and water use efficiency in baby lettuce

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