Abstract
ABSTRACT This study aimed to carry out an economical and productive analysis of carrot production using different irrigation depths and doses of fertilizer. A randomized block design was used arranged in a 6 × 4 factorial scheme, with three replicates. The treatments were constituted by six irrigation depths: (L1: 210.5, L2: 315.7, L3: 421.0, L4: 526.2, L5: 631.5, and L6: 736.7 mm) and four doses of fertilizer: (F1: 226.9, F2: 340.3, F3: 453.8 and F4: 567.2 kg ha-1) applied via fertigation. At the end of the cycle, four carrot roots were collected per plot to estimate yield. The maximum estimated yield of the carrot was 95.4 t ha-1, obtained using 478.1 mm of water and 538.8 kg ha-1 of fertilizer. The best economic return was achieved with 482.0 mm of water and 460.0 kg ha-1 of fertilizer, giving 95.0 t ha-1. The combination of irrigation and fertilizer allows lesser amount of both to be used, giving greater response than when applied separately.
Highlights
The carrot is the main vegetable in the group of tuberous roots (Resende et al, 2016)
Studies carried out in Brazil have shown that the decreasing order of macronutrients extracted by the carrot crop is potassium, nitrogen, calcium, and phosphorus (Bonetti et al, 2017)
The experiment was conducted under field conditions at the Universidade Federal de Alagoas (UFAL), Arapiraca, AL, Brazil (9o45’09’’ S and 36o39’40’’ W and altitude of 325 m), between March and July 2016
Summary
The carrot is the main vegetable in the group of tuberous roots (Resende et al, 2016). In the Agreste region of Alagoas state, Brazil, climate conditions are favorable to the production and development of the carrot; with the long dry season, the crop requires irrigation to achieve satisfactory yields (Carvalho et al, 2018). The response of crops to different irrigation depths consists of the rational use of water to meet the water requirement of the plant (Yasuor et al, 2017). Phosphorus is essential for their establishment and development (Pelá et al, 2018). It favors the root system, increasing the absorption of water and nutrients, resulting in increased yield (Silva et al, 2015)
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