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Technical annual report 2000-01



Technical annual report 2000-01


Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals

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Dept. of Primary Industry and Fisheries

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Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295



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Department of Primary Industry and Fisheries 168 These trees have been planted in the spaces in each row, thereby increasing the density. Phenology and growth measurements of the trial are being recorded. Two of the varieties being assessed, Mata Kuching and Xuong com vang, are beginning to display very different habits. Mata Kuching is a very upright tree with a single trunk, and branches freely from the trunk. The leaves are large, bright green and relatively soft. They are also fairly susceptible to insect damage. Xuong com vang is quite the opposite, with very shrublike behaviour, thick and bushy with multiple stems from the ground. Leaves are small, thick, green above and pale below, and the new flush is pink to red. Pitaya The pitaya trial at CPHRF is continuing, with plant growth being assessed every three months. Growth has been rapid and the plants are now branching at the top of the pole and hanging down, with branch numbers increasing. This season the plants should come into full production and yields will be assessed. Last season a number of plants produced fruit, and average fruit weight appears below. Table 1. Average fruit weight 2000/2001 Plant No. Flesh type Weight (g) Length (cm) Width (cm) % Brix R3P1 white 393.82 11 7 13.5 R3P4 red 196.13 9 5.5 15.1 R2P2 white 432.58 10.5 7.5 13.8 R4P1 white 383.02 10.25 7.12 14.8 Nutrition is also being looked at and a fertiliser program has been put in place. Samples of sap are being analysed to identify any patterns in nutritional requirements. A few problems with the methodology have been encountered, but the results so far are promising, and will be published in future reports, when sufficient data has been collected. PROJECT: Miscellaneous Fruits Research - Katherine Component Project Officers: J. Mansfield, C. Kinnaird, D. Hill and R. Renfree Location: KRS Objective: To research, identify and evaluate suitable fruit crops for Top End production. The main tree crops grown commercially in the Katherine region are mango, grapefruit and lemons. In this project, other tree species such as avocado, casimiroa, atemoya, lychee, pomegranate, guava, carambola, sapodilla, Artocarpus sp., caimito and other Annonaceae and Sapindaceae species are being trialled for their suitability as commercial crops for the Katherine region. A number of subtropical species such as avocado and lychee have in the past failed to fruit in the Katherine region. This is due to the warm conditions and the lack of sustained periods of cool nights. While for some species in this trial only seedling trees have been planted, for others such as avocado, annona and lychee a range of cultivars have been planted. For avocado, it is only cultivars from the West Indian avocado race, or hybrids derived from them, that are considered to possess the ability to fruit under conditions at Katherine. The primary aim of this project is to record the growth patterns of trees in the region in relation to the timing of fruit harvest.