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
Dept. of Primary Industry and Fisheries
Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295
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Department of Primary Industry and Fisheries 134 PROJECT: Rootstock Effects on Mango Productivity - Katherine Project Officers: J. Bright, S. McAlister and R. Renfree Location: Co-operator properties in the Katherine Region Objective: To evaluate potential rootstocks to control tree vigour and performance. To identify salinity tolerant rootstocks for the Mataranka region. In response to the promising results obtained over past seasons with just a few rootstocks, it was decided to evaluate a far greater range of polyembryonic genotypes that may prove useful as rootstocks for Kensington Pride. There was also a need to evaluate the influence of soil type and salinity on rootstock performance. This project covers information published in previous Horticulture Division Technical Annual Reports under the titles "Root stocks for saline soil conditions" and "Rootstock effects on mango productivity". Method: Rootstocks for saline soil conditions sub-project Rootstocks were included primarily on the basis of their performance in past experiments in Central Australia in which the uptake of Na and Cl and the development of leaf symptoms were used to screen polyembryonic cultivars. It was considered necessary to evaluate the effectiveness of this screening procedure by examining how selected cultivars performed as rootstocks for Kensington Pride, under a range of "stressful" soil conditions. Rootstocks included in the trial were: Treatment 15 KRS water tank; Treatment 16 Kensington Pride; Treatment 18 Sg. Siput; Treatment 35 Banana Callo; Treatment 52 13-1 (selected in Israel - good tolerance). Kensington Pride was used as the scion on all rootstocks at all sites. At each site, treatments were replicated five times in single tree plots. The experiment sites, approximate conductivity, and planting dates are shown in Table 1 Table 1. Experimental location, conductivity and planting date Site Conductivity S/cm Planting date Broome (WA) 3,900 May 1998 Mataranka (NT) 1,500 August 1997 Bowen (QLD) 3,000 Not Planted Rockhampton (QLD) Unknown Not planted Root stock evaluation on Blain and Tippera soil types sub-project In an experiment 64 different root stocks were planted in mid 1996 on Tippera clay loam, while in a second experiment 104 different root stocks were planted in late November/early December 1997 on Blain sandy loam. These trials consisted of polyembryonic genotypes from DPIF arboreta, trees identified by local nurserymen, polyembryonic types bred at KRS, seed supplied by overseas mango workers and a limited range of other Mangifera species. In both experiments each treatment was replicated five times with individual tree plots. Nearest-neighbour designs have been employed in an attempt to account for spatial variation.