©2023 International Society of Arboriculture 162 Alves et al: Influence of Protected Environments and Reflector Material on Oiti Seedlings The PAR incidence in full sun was 1,643 µmol m−2 s−1. On average during the period studied, 37% of this total reached the interior of the greenhouse (A1), 43% passed the aluminized screen (A2), 57% passed the black screen of 30% shading (A3), and 68% passed the black screen of 18% shading (A4)(Figure 1). For the variables SH2, SH3, SD1, S:R, and H:S, it was found that the ratio between the largest and smallest mean square error (RMSE) was greater than 7.0, and therefore, for the variables mentioned above, it was not possible to perform the joint analysis of experiments (Banzato and Kronka 2013) and com- pare the protected environments. For these variables mentioned above, the production systems with and Table 1. Mean square error (MSE) and ratio between the largest and smallest mean square error (RMSE) for the variables of seedling height (SH), number of leaves (NL), and stem diameter (SD) at 40, 55, and 70 days after sowing (1, 2, and 3, respectively), shoot dry matter (SDM), root dry matter (RDM), ratio between SDM and RDM (S:R), total dry mass (TDM), ratio between SH and SD (H:D) at 40, 55, and 70 days after sowing (1, 2, and 3, respectively), ratio between SH and SDM (H:S), Dickson quality index (DQI), absolute growth rate between SH1 and SH2 (AGR12), absolute growth rate between SH2 and SH3 (AGR23), and absolute growth rate between SH1 and SH3 (AGR13) of oiti seedlings. MSE Environment SH1 SH2 SH3 NL1 NL2 NL3 SD1 SD2 Greenhouse 42%/50% 15.281 11.750 8.020 0.813 0.983 0.386 0.053 0.030 Aluminized screen 35% 16.948 23.786 10.553 0.247 0.820 2.599 0.008 0.066 Screenhouse 30% 22.115 7.460 6.058 0.509 0.628 0.573 0.100 0.090 Screenhouse 18% 60.417 1.973 1.430 0.531 1.053 1.803 0.143 0.131 RMSE 3.95 12.06 7.38 3.29 1.68 6.73 18.00 4.44 Environment SD3 SDM RDM S:R TDM H:D1 H:D2 H:D3 Greenhouse 42%/50% 0.013 0.743 0.209 0.087 1.487 0.847 0.465 0.388 Aluminized screen 35% 0.061 0.435 0.042 0.122 0.517 0.941 0.458 0.347 Screenhouse 30% 0.085 0.259 0.147 0.041 0.750 1.025 0.068 0.194 Screenhouse 18% 0.030 0.661 0.129 0.367 0.976 3.859 0.470 0.113 RMSE 6.56 2.86 4.95 9.01 2.88 4.56 6.94 3.45 Environment H:S DQI AGR12 AGR23 AGR13 Greenhouse 42%/50% 2.44 0.015 0.045 0.017 0.013 Aluminized screen 35% 1.25 0.005 0.076 0.024 0.012 Screenhouse 30% 0.29 0.007 0.103 0.027 0.044 Screenhouse 18% 2.16 0.009 0.312 0.010 0.075 RMSE 7.50 2.96 6.96 2.64 6.29 without reflective material on the bench in each exper- iment (environment) were evaluated separately. For the other variables, the RMSE was lower than 7.0 (Table 1), and therefore they were assessed in a 4 × 2 factorial scheme (4 environments × 2 production systems). In the variables that presented RMSE lower than 7.0 (Table 1), the analysis of variance revealed that there was no interaction between the cultivation envi- ronments and reflective material (A × B), and there was no significance for the cultivation benches. For the cultivation environment factor, the variables seed- ling height at 40 DAS (SH1), stem diameter at 55 DAS (SD2), root dry mass (RDM), total dry mass (TDM), ratio between seedling height and stem
July 2023
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