Phenophysiology of the formation and fall of flowers in overcoming efforts fruit-set failure in siam citrus plants

Flowers are the critical point of fruit formation. In this study the design used was a randomized block design, taking into account the position of the stem and the season affecting the fall and making flowers. The average value between intervals and Gadu does not show a significant difference with the number of falling flowers, namely: 152.57 florets and 151.44 (florets). The percentage of fruit set at the top, middle and bottom stems produce a difference, 92.75% followed by the middle stem, namely: 92.52%. The average value between intervals and Gadu does not show a significant difference with each percentage of fruit sets formed, namely: 93.30% and 93.07% Percentage formation of fruit sets in the upper stem supported by high leaf chlorophyll content Nutrient content of N, P, and K in the upper stem is 25.82%, 1.40%, 0.74% 3.42% when compared to rootstock, which are: 18.64%, 1.16%, 0.13% and 2.17%.