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Research Report

Cinnamomum parthenoxylon (Jack) Meisn: Ecology and silviculture in Vietnam

Chaw Chaw Sein
Ralph Mitlöhner
Copyright Date: Jan. 1, 2011
Pages: 18
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Table of Contents

  1. (pp. 1-1)

    Due to heavy exploitation and deforestation, Cinnamomum parthenoxylon (Jack) Meisn has been exhausted and is very rare in Vietnam. Aside from its economic objectives, the Government of Vietnam’s Five Million Hectare Reforestation Project aims to protect the environment, restore forest ecosystems and conserve biodiversity. The preservation of native indigenous species is of special significance to the country (FSIV and JICA 2003)....

  2. (pp. 1-2)

    Botanical name: Cinnamomum parthenoxylon (Jack) Meisn

    Family: Lauraceae

    Subfamily: Lauroideae

    Vernacular/common names: Re huong (Vietnam), Huang zhang (China), Saffrol Laurel, Martaban camphor (English), Dalchini, Ohez, Gondhori (India), Karawe, Hmanthein (Burma), Kayu (Sabah, Malaysia).

    Source: (18 August 2011)

    Cinnamomum parthenoxylon is a large, evergreen tree species, capable of reaching a height of 30 m and a diameter at breast height of 60–70 cm. The bark is silvery grey, smooth and slightly fragrant. The leaves occur singly, possess three basal veins and are located onalternating sides of the stem The leaves’ upper layer is glabrous, whereas the lower layer is...

  3. (pp. 2-3)

    Good seeds are selected from seed orchards, seed production areas and mother (plus) trees in order to attain a superior quality tree, with a straight stem devoid of disease. The optimum time for seed collection is as soon as the seed has reached maturity. If not collected then, the seed may over-ripen and not germinate well, or be susceptible to insect attack if fruit or pods stay on the tree too long. Seed collection should be conducted when pods or fruit are still on the tree.

    Cinnamomum parthenoxylon flowers during the period March-May, with the fruits ripening in February-March the...

  4. (pp. 3-4)

    Within 5–7 days of incubation, the seeds split and should be sown into tube pots or beds. Seeds sown in beds should be spaced at 1 phalange between every 2 seeds, and then covered with a layer of soil 1 cm thick, before the beds are overlain with straw. Seeds sown in pots should be planted one seed to each pot, with a mixture of 85–90% nursery soil combined with 10–15% well-decomposed manure.

    It is necessary to keep the sown pots moist and shaded with plants or nets to ensure no more than 40–50% sunlight. The...

  5. (pp. 4-5)

    Weed control is necessary to reduce the competition for water and nutrients between trees and weeds. Competition from weeds severely decreases early tree performance, and weed growth can be prolific in subtropical and tropical regions. Weed control before planting and for at least 12 months after should be considered essential for successful plantation establishment. A 2 m wide weed-free strip along each planting row should be established during the first 2 years. Weed control conducted by manual weeding or by herbicide has been shown to improve stand productivity. A minimum of weeding twice a year during the first 2 years...

  6. (pp. 5-8)

    Height and diameter are important inventory measures for estimating tree volume. In this study, Michailow’s growth function was used to estimate the diameter and height of the stand.

    Table 1 presents growth in diameter and height of samples from 25 Cinnamomum parthenoxylon plots.

    The annual growth in diameter and height from 1 to 17 years of age is nearly identical. These plantations were evaluated to determine the mean annual increases. They achieved a minimum increase in diameter of 1.7 cm and height of 1.9 m at 2 years of age and a maximum increase in diameter of 13.5 cm and...