Guava (Psidium guajava L.) is a plant whose fruit is very popular in Indonesia because it contains high vitamin C and its leaves can be used as herbal medicine. Orchard expansion of selected cultivars and fruit production of guava can be achieved vegetatively through  propagation by using mini-cuttings with the use of Indole Butyric Acids (IBA). A study was conducted to compare rooting success of mini-cuttings of herbaceous stem of four guava cultivars with IBA treatment. Four guava cultivars tested were Bengkulu Round, Getas, Crystal, and Bangkok.  Mini-cuttings were immersed in IBA solution at 0 ppm or 1000 ppm. Cultivar and IBA treatments were arranged factorially in a randomized complete  block design with  3 replications, each consisting of 25 cuttings. Variables observed included percentage of original-leaf shedding, percentage of emerging shoots, percentage of sprouting cuttings, new leaf number, root number, root length, and percent of rooted cuttings. The results demonstrated that cultivars affected rooting percentage, sprouted percentage, percentage of original-leaf fall, and number of root.  Getas had highest rooting and sprouting percentages, and showed lowest number of  original-leaf shedding; whereas, Bangkok demostrated greatest number of root.  IBA treatment increased the number of root and the number of original-leaf shedding, but reducing rooting percentage of mini-cutting. There was no interaction between cultivar and IBA teratment.

ABSTRACT[THE EFFECT OF GOAT MANURES AND NPK 16:16:16 FERTILIZER ON THE GROWTH OF SEEDLESS GUAVA CROPS AND QUALITY OF ITS FRUIT (Psidium guajava L) AT RAINY SEASONS OF INDONESIA]. Guava var. Crystal, known as seedless guava, is one of the most popular guava in Indonesia. Compated to other guavas, seedless guava has softer texture, tastes sweeter, and has less seeds. This experiment was carried out from September 2017 to February 2018 at Harapan Makmur village, Pondok Kubang regency, and Central Bengkulu district. The objective of this experiment was to evaluate the effect of goat manures and NPK 16:16:16 fertilizers on the growth of guava crops and the quality of its fruits. The experiment was arranged in randomized complete block design (2 factors, 5 replications). The first factor tested was the dose of goat manures, consisting of 3 levels: 0, 9, and 18 kg/plant. The second factor tested was the dose of NPK 16:16:16 fertilizers, consisting of 3 levels: 0, 0,25, and 0.5 kg/plant. The results showed that goat manures significantly affected the diameter and number of branches. In addition, the dose of NPK significantly affected the diameter of branches, degree of leaf greenness, number of flower, and number of aborted flowers. Finally, the interaction between goat manures and NPK manures did not significantly affect all variables measured, except for leaf areas.

Calamansi is the leading horticultural commodity of Bengkulu City. The study aimed to determine the best combination between Growmore doses and local microorganisms for the growth and flowering of Calamansi. This study used a Factorial Complete Randomized Design (CRD). The first factor of Local Microorganisms (M) consists of two levels, namely without being given (M0) and given Local Microorganisms (M1). The second factor of Growmore (D) dose consists of four levels, namely 0 g / L (D0), 1 g / L (D1), 2 g / L (D2), 3 g / L (D3). The results showed that there was no difference in the combination between the treatment of local microorganisms and the dose of Growmore both on the growth and flowering of the potting of calamansi. In a single factor, Growmore doses have an intangible effect on the growth and flowering of the potting of calamansi. Likewise, a single factor of local microorganisms exerts an unreal influence on the growth and flowering of the potting of calamansi.

Intara YI, Nusantara AD, Supanjani, Caniago Z, Ekawita R. 2019. Spatial patterns of evapotranspiration distribution in palm oil plantation. Nusantara Bioscience 11: 1-7. Evapotranspiration can directly calculate by some climatic factors which are processed in the form of simulation modeling of two-dimensional evaporation distribution on specified coordinates. This research had been conducted in palm oil plantation PT. Bio Nusantara Bengkulu, Indonesia. The sampling location covered some areas named as TM2, TM22, Palm oil-Field, Palm oil-Residential Area and Palm oil-Secondary Forest. The TM2 and TM22 were a location of palm oil plantation used for 2 and 22 years planting respectively. The three remaining locations dedicated to areas of which mix TM22 with soccer Field, Residential Area and Secondary Forest. The results showed that in palm oil plantation TM 2 which consisted of herbaceous plants and bushes produced more water vapor. At palm oil plantation TM 22 which had fully developed canopy or the entire soil area had been covered by canopy, so only transpiration occurred at this site, less water vapor was produced. This is due to the temperature condition is inversely proportional to the relative humidity. As a comparison of a palm oil plantation evapotranspiration measurement result, indicated on area of football field where only has grass in the field, with low intensity of light, wind, and humidity, affected directly to high amount of evapotranspiration, therefore, more water vapor produced. The measurement result of palm oil plantation nearby residential area showed that the area which consisted of herbaceous plants and bushes, also zinc-roofed residential with the intensity of light and wind directly hit the area, produced less water vapor. Moreover, the condition at the border area between TM 22 and the palm oil secondary forest contained mixed plantation. The measurement result showed that the palm oil secondary forest had the same height of canopy and almost had equal humidity (>76%), but secondary forest plants had more dense plantation density which produced less water vapor.

Elaeisponic is new introducing growing technique to produce vegetables by planting it in the frond based of oil palm trees (Elaeis guineensis Jacq.). However, there was no previous report on vegetable production by using elaeisponic production system, including the use of foliar fertilizers. This study aimed to determine the optimum consentrations and frequency of foliar fertilization for caisim grown in elaesisponic production system. An experiment was conducted in oil palm plantation area by using a factorial randomized complete block design with three replicates. The first factor of treatment consisted of three levels of foliar fertilizer concentration, 1 g l-1, 2 g l-1 and 3 g l-1, and the second factor was application frequency of foliar fertilizer, 7 days after transplanting (DAT), 7, 14 DAT and 7, 14, 21 DAT. Crop responses were determined on leaf greenness (SPAD index), shoot fresh weight (g), root fresh weight (g), leaf area (cm2) and plant dry weight.  Results indicated that both concentration of foliar fertilizer and frequency of application as wells as its interaction did not significatly affect leaf greenness, leaf area, shoot fresh weight, root fresh weight and plant dry weight of caisim plants.  Further research should be addressed on optimizing the use of palm oil frond bases as growing medium for vegetable production.  Keywords: Elaeisponic Production System; Brassica juncea L; Foliar Fertilizer; Frequency of Application.