Author(s)

Agustín Damián Nava¹, Víctor A. González Hernández², Manuel Nava Jaimes¹, Elías Hernández Castro^1*, Dolores Vargas Álvarez¹, Gemima Díaz Villaseñor¹, Francisco Palemón Alberto¹, Blas Cruz Lagunas¹

¹Academic Unit of Agricultural and Environmental Sciences, The Autonomous University of Guerrero, Guerrero, México.
²Institute of Genetic Resources and Productivity, Graduate College, Texcoco, Mexico.

In the Mexican tropics the guava trees can grow and produce in any season, so they can be har-vested out of the period of high competition marketing (Summer). It studied the growth kinetics of leaves and fruits of guava trees at the dry tropical conditions of the State of Guerrero, in guava trees of four years old and was evaluated a non-destructive method for measuring leaf area from November to May. 100 sheets of 10 randomly selected trees were cut. It was found that leaf length X the width X 0.72581647 (conversion factor) gave an estimated leaf area which was significantly correlated with that obtained by the integrator of leaf area. Both in length and width the leaf growth kinetics were sigmoid with three growth stages: In Stage I (15 days) leaves grew 21.2% and 21.5%; in Stage II (26 days) grew 73.6% and 68%; and in Stage III (30 days). They Increased 5.2% and 10.5% in the primary and secondary sprouts. The fruit growth in its equatorial and polar diameters corresponded to a double sigmoid kinetics. In Stage I (61 days) it reached 1.9 and 2.3 cm; in Stage II (62 - 102 days) it reached 3.09 and 3.62 cm; and in Stage III (103 to 126 days) it reached 4.63 and 5.13 cm, as well the physiological maturity of fruit.

Psidium guajava, Growth Kinetics, Phenological Events

Nava, A. , Hernández, V. , Jaimes, M. , Castro, E. , Álvarez, D. , Villaseñor, G. , Alberto, F. and Lagunas, B. (2014) Growth Kinetics of Vegetative and Reproductive Organs of Guava (Psidium guajava L.) in Iguala Guerrero, Mexico. Agricultural Sciences, 5, 1468-1475. doi: 10.4236/as.2014.514157.