Fruit Quality of Guava (Psidium guajava ‘Kristal’) under Different Fruit Bagging Treatments and Altitudes of Growing Location

Abstract

Fruit quality is an important aspect that requires attention and more study when it comes to commercializing tropical fruits, including guava ‘Kristal’. This study aimed to evaluate the effect of bagging treatment and altitude of growing orchard on fruit quality of guava (Psidium guajava var. ‘Kristal’). This study was conducted at two local orchards managed by small-scale farmers, at Gunung Batu (1000 meters above sea level, m asl) and Brajaselebah (25 m asl), Lampung Province, Indonesia. A nested design was applied to test 5 types of bagging treatments and 2 levels of land altitude. Fruit quality was assessed by measuring both physical and chemical characteristics. Fruit size indicated by fruit weight and diameter was significantly larger in lowland compared to highland. The total soluble solids (TSS) were significantly higher in the lowland compared to the highland, while titratable acid (TA) showed an opposite result. Vitamin C of the fruits varied from140 to 146 mg per 100 g. Different types of fruit bagging and land altitudes did not affect the physical and chemical characteristics of “Kristal” guava fruits. Fruit scar intensity was higher in lowland, especially in fruit without bagging. Fruit bagging is highly recommended for farmers due to the success of this treatment to reduce fruit scar intensity, thus resulting in good fruit quality, irrespective of the growing locations.

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“…This study indicates that the ideal growing place for salak plants is between 450 m to 650 m asl (Tabel 9). This study is in line with several previous studies which explained that altitude affects the flowering process and fruit enlargement (Sophie at al., 2017;Spinardi et al, 2019;Widyastuti et al, 2022). The soil analysis results showed that the total N and P2O5 contents at three locations in Tabanan were very low to low, while the K2O content at the six study sites was very low (Table 3).…”

“…Therefore, one way of handling salak quality is by undertaking severe studies for factors such as land and climate and adjusting agricultural patterns according to local climate conditions (Nassar et al, 2018). The success of each species to occupy the environment of an area is influenced by its ability to adapt optimally to all physical environmental factors (temperature, light, soil structure, humidity), biotic factors (interaction between species, competition, parasitism), and chemical factors including the availability of water, oxygen, pH, and nutrients (Nassar et al, 2018;Widyastuti et al, 2022). Moreover, a broad genetic variability would lead to wide phenotypic variability due to the effect of genetic-environment interaction (Ritonga et al, 2018).…”

Agronomic Characters and Quality of Fruit of Salak cv. Gulapasir Planted in Various Agro-Ecosystems

“…Therefore, one way of handling salak quality is by undertaking severe studies for factors such as land and climate and adjusting agricultural patterns according to local climate conditions (Nassar et al, 2018). The success of each species to occupy the environment of an area is influenced by its ability to adapt optimally to all physical environmental factors (temperature, light, soil structure, humidity), biotic factors (interaction between species, competition, parasitism), and chemical factors including the availability of water, oxygen, pH, and nutrients (Nassar et al, 2018;Widyastuti et al, 2022). Moreover, a broad genetic variability would lead to wide phenotypic variability due to the effect of genetic-environment interaction (Ritonga et al, 2018).…”

Plant Reproductive Responses of Guava ‘Crystal’ Under Different Paclobutrazol and NPK Fertilizer Doses

“…Cultural techniques that have been studied to increase production and fruit quality include fruit bagging (Widyastuti et al 2022a), organic fertilizer application (Trivedi et al 2012;Goswami et al 2015), biofertilizer usage (Shukla et al 2014;Widyastuti et al 2021), flower bud thinning (Suman and Bhatnagar 2019), strangulation (Widyastuti et al 2019b), pruning (Bhagawati et al 2015;Lal et al 2016;Susanto et al 2019;Widyastuti et al 2019c), and the application of growth retardant (Lizawati 2008). Paclobutrazol is a growth retardant that triggers reproductive responses, particularly flowering initiation.…”