Name: CARLOS MAGNO MULINARIO POLONI
Publication date: 23/10/2020
Advisor:
Name |
Role |
|---|---|
| ROBSON BONOMO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| JOABE MARTINS DE SOUZA | Internal Examiner * |
| ROBSON BONOMO | Advisor * |
Summary: The use of irrigation in the culture of conilon coffee (Coffea canephora) is widespread in Brazil, corresponding to the largest area irrigated by culture in the state of Espírito Santo. Among the irrigation systems commonly used in coffee growing in the northern region of Espírito Santo, drip stands out. The present work aimed to characterize the spatial distribution of the root system of coffee conilon, under subsurface drip irrigation and different irrigation depths. The study was carried out in the experimental area of the Centro Universitário Norte do Espírito Santo (CEUNES), located in São Mateus ES city. Genotype 143 was used as a sample, the population density of 3,333 plants/ha-1, irrigated by surface drip (control), and buried. The experiment was carried out in randomized blocks with three repetitions, in the 7x6x10 factorial scheme, with seven slide / drip depth (100% / Superficial; 100% /
0.10 m; 100% / 0.20 m; 75% / 0, 10 m; 75% / 0.20 m; 45% / 0.10 m and 45% / 0.20 m), six distance from the plant (0.20; 0.40; 0.60; 0.80; 1, 00 and 1.20 m) and ten depths (0.10; 0.20; 0.30; 0.40; 0.50; 0.60; 0.70; 0.80; 0.90 and 1.00 m). The plants were sampled 700 days after planting, with the aid of probes, at six points in relation to the trunk for the between planting line. For each distance, 10 samples 0.10 cm in length with a volume of 277.08 cm³ were taken in depth in 21 plants. The data of volume, surface área, and diameter of the roots were analyzed and submitted to statistical analysis by the method of Scott and Knott. The restriction of 25% of the applied irrigation provided greater depth of the root system, however, the 100% replacement blade limited the depth. Therefore, water restriction influences the quantity and distribution of roots. In addition, the side irrigated by the drip tube
provided a greater amount of roots to the detriment of the non-irrigated side.
