| dc.description.abstract | One of the obstacles that exists in the cultivation of mangosteen in Indonesia is the low effectiveness of calcium absorption in mangosteen fruit tissue. Most of the calcium absorbed from the roots will be directly localized to the leaf tissue, because of the nature of calcium which is not mobile and translocation in plant tissues. This results in the possibility of very high levels of yellow. Sap contamination in mangosteen fruit reaches 93% of total production. This study aims to: (1) determine the effect of calcium and calcium in overcoming the yellow sap contamination on mangosteen fruit; (2) Mechanism of absorption and distribution of calcium in mangosteen fruit plants. The study was carried out in the mangosteen garden of the Manggis Karya Mekar Farmer Group, in Cengal Village, Karacak Village, Leuwiliang District, Bogor, Indonesia. The experiment was carried out using factorial randomized block design (RBD) with 3 replications, consisting of the treatment of calcium and boron fertilizer doses as the first factor, consisting of 6 levels, namely: (1.) Control (without calcium and without B ), (2) 2.8 g B / tree / year (6.09 g borate 46 / tree / year), (3) 3.2 kg of calcium dolomite / tree / year (10.67 kg dolomite / tree / year), (4) 3.2 kg of calcite / tree / year calcium (7.11 kg of calcite / tree / year), (5) 3.2 kg of calcium dolomite / tree / year + 2.8 g B / tree / year, and (6) 3.2 kg of calcium calcite / tree / year + 2.8 g B / tree / year. While the second factor is the number of stages of giving calcium and boron in mangosteen per year (T), which consists of 2 levels, namely: (1) giving calcium and boron at the time of the antesis and at the start of the first stage (1 week after the antesis (MSA)). Each time the application is given calcium and boron half of the dose specified. (2) giving calcium and boron at the time of anthesis and at the end of stage I (4 MSA). Each time the application is given calcium and boron half of the dose specified. The results showed that: (1) Application of calcium was able to reduce the contamination of yellow sap on the mangosteen aryl fruit reached 53% and on the skin reached 46% and improved the quality of mangosteen fruit, without calcium produced plants while yellow sap contamination of 91.66% on aryl and 86% on the skin; (2) Calcium is absorbed and distributed by the mangosteen plant through several mechanisms, namely: through xylem in root and continue to the stem and then to pedicel before absorbed into the fruits. The higher Calcium tranlocation to fruits is at the rapid fruit growth. | en_US |
