Variability and nutritive compounds of guava (Psidium guajava L.)

Guava (Psidium guajava L.) is a tropical fruit plant. The study was conducted at three different altitudes in guava production center of Indonesia.  The objectives of this research are to obtain information about the production and quality of guava at three locations by using manure applications. The study was conducted to guava plants at the age of 4 yr (first production). The study was designed according to the factorial design of 3 × 2 with 5 times replications. The first factor is the locations, which are the location-I (Pageruyung), location-II(Sukorejo) and location- III (Plantungan). The second factor is the provision of organic material of manure; without and with manure (2.5 t · ha–1). The data collected is the guava production (total production for four months tree), diameter, weight, flesh thickness, seeds weight, fruit acid content and sugar content. Result of research showed (1.) the interaction between the location and the addition of manure in the cultivation of guava increased its fruit production, weight, and the sugar content, (2.) the research locations have elevation and soil chemical content varies in fruit diameter, seeds weight, and fruit acid content, (3.) manure significantly increased fruit production, weight, diameter, flesh thickness and sugar content, but it did not increase seeds weight and it reduced the fruit acid content.