Improving the quality fruit of Citrus cv. Siam out off-season through the application of fertilization and pruning

This study aims to determine the efforts to improve the quality of Siamese citrus fruits during the growing season through fertilization and pruning. This experiment used a factorial randomized block design consisting of 2 factors. The first factor is fertilization, namely: P0 (manure/control), P1 (manure, N, P, K, and Ca) and P2 (manure, N, P, K, Ca, Zn and Cu). While the second treatment is pruning, namely: M0 (without trimming), M1 (trimmed young shoots) and M2 (trimmed young shoots, twigs, and leaves affected by disease and shaded). The results showed that the interaction between fertilization and pruning treatment had no significant effect on all observed variables. P2 treatment can improve fruit quality, which is reflected by the weight of the fruit harvest per tree (3442.76g); weight per fruit (173.58g) and total dissolved solids (9.48obrix) or increase by 99.79%; 35.69% and 30.22% compared to P0 which is 1673.13g; 127.92g and 7.28obrix. In the M2 treatment can improve fruit quality, which is reflected by the weight of fruit harvest per tree (3638.77g), weight per fruit (173.58 g) and total dissolved solids (9.63obrix) or increase by 40.91%; 19.56% and 25.55% when compared with treatment M0 which is 2582.34g; 145.92g and 7.67obrix.