Study of Leucaena Leucocephala (Lam.) De Wit. and native species diversity in secondary forest fragments at Suranaree University of Technology (original) (raw)
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The infl uence of Leucaena (Leucaena leucocephala) on tree regeneration was studied in a natural forest in the Khao Phuluang Ecotourism Development Project, northeastern Thailand. In total, three belt transects of 10 × 150 m were established perpendicular to the edge of the remnant forest (RF) and Leucaena plantation (LP) to study the changes in vegetation structure and species composition along a gradient from the RF into the adjacent LP. The vegetation transect census recorded the living numbers of seedlings, saplings and trees, excluding lianas, and the stem diameter and height were measured for saplings and trees. Light and soil conditions were also investigated.
Frontiers in Agronomy
Leucaena leucocephala (Lam.) de Wit (commonly known as leucaena) is a leguminous species of the family Fabaceae and a native of Mexico and Central America. It is often addressed as a “miracle tree” for offering a wide variety of ecosystem services and possessing strong ecological attributes. The multiple uses of leucaena in agroforestry, livestock, and restoration practices led to the worldwide distribution of its ssp. glabrata and leucocephala. However, following its introduction into non-native regions, the commercial value of ssp. leucocephala was challenged by its large-scale spread outside the cultivation zone. It has assumed a status of an environmental weed and invasive plant in many regions across Africa (17 countries and Island nations), Asia (17), Europe (1), Oceania (23), North America (12), and South America (7). The plant is enlisted in the top five terrestrial invasive plant species with the greatest international presence. The species is now considered one of the 100 ...
Invasiveness and Biomass Production of Leucaena
JOURNAL OF TROPICAL FOREST SECIENCE, 2017
Very few agroforestry species perform well in the Cuvelai Basin of north-central Namibia due to the harsh climatic and edaphic conditions. Leucaena leucocephala is one of these species and has many ecological and economic benefits but it tends to be invasive. To evaluate the suitability of this species for agroforestry in Namibia, two experiments were conducted at the Ogongo Campus of the University of Namibia. As indication of invasiveness, seed germination and survival of seedlings under different management were monitored for 44 weeks and growth rates of 33-month-old sprouts were used to estimate the potential wood biomass production. Watering and tilling the land gave the highest number of surviving seedlings. Death of seedlings was highest during the dry cold and dry hot months. Height growth rate of sprouts was 1.98 m year-1 and sun dried wood production was 15.8 tonnes ha-1 year-1. Low temperature, soil surface hard pan and extreme lack of moisture could limit seedling survival and hence invasiveness. Biomass production compares favourably with productivity of L. leucocephala grown elsewhere. The likelihood of the species becoming invasive is viewed as high only in cultivated, irrigated areas. Leucaena leucocephala could be utilised as an agroforestry species under proper management to minimise chances of it becoming invasive.
A Review Study on Leucaena leucocephala : A Multipurpose Tree
Leucaena leucocephala is a long lived perennial legume tree. It is non-climbing, erect, thornless shrub or small tree, grow in arid and semi-arid areas. It is a multipurpose tree, young leaves and seed used as a vegetable. It is used as soil fertility improvement. Various parts of L. leucocephala have been reported to have medicinal properties. In present paper detailed taxonomic description, photographs, botanical description and its uses are discussed.
Leucaena leucocephala (Lam.) de Wit in Brazil: history of an invasive plant
Estudos Ibero-Americanos
The purpose of this text is to provide a long-term record of occurrences of the species Leucaena leucocephala (Lam.) de Wit. in the Brazilian territory, in order to (i) determine if its introduction occurred before the earliest official record, (ii) identify points of occurrence in Brazil, and (iii) assess its status as a useful although invasive plant. The text is partly based on research done on the confirmed presence of this plant in the Brasília National Park, located in Brazil’s Federal District. Three databases available on the Internet containing information from several herbariums were accessed to obtain the location and the dates of the relevant records of the plant in Brazilian territory. We found that the species was rather widely present in the Brazilian territory before the official record of its earliest introduction. In addition, we found that the plant’s current geographic distribution indicates that it continues to have a strong invasive potential in Brazil, especi...
The Southern African Forestry Journal, 2006
Growth performance and psyllid resistance was studied among nineteen lesser-known Leucaena species/ provenances at Gairo inland plateau, Morogoro, Tanzania. Assessment was done at irregular intervals for survival, root collar diameter and diameter at 30 cm above the ground, height, diameter at breast height, multiple stems production, biomass and psyllid resistance. Final assessment of these tree attributes was done at 37 months after planting, while psyllid resistance was assessed at 9 and 37 months after planting. During the final assessment occasion, height ranged from 2.69 m for L. collinsii Ex. Chiapas to 4.87 m for L. diversifolia Ex. Veracruz. Diameter at breast height (Dbh) ranged from 2.26 cm for L. shannonnii Ex. Chiapas to 4.93 cm for L. diversifolia Ex.Veracruz, while multiple stems production ranged from 2709 stems ha -1 for L. pulverulenta Ex. Tamaulipas to 7135 stems ha -1 for L. leucocephala Ex. Morogoro and untransformed survival ranged from 43.75% for L. pulverulenta Ex. Tamaulipas to 100% for L. diversifolia Ex. Veracruz. Total wood biomass production ranged from 3.74 t/ha for L. shannonnii Ex. Chiapas to 15.61 t/ha for L. diversifolia Ex. Veracruz. The study has shown that species/ provenances differ significantly in survival, diameter, height growth, psyllid resistance, multiple stem production and biomass production. Based on these findings, provenances L. diversifolia Batch (15551), L. diversifolia Ex. Mexico, L. diversifolia Ex. Veracruz and L. pallida Ex. Oaxaca are recommended for Gairo and similar sites.
Lectotypification of Indian taxa of Leucas (Lamiaceae)
Seventeen species and five varieties of Indian Leucas R. Br. are lectotypified here: Leucas angustissima Sedgw., L. ciliata Benth., L. clarkei Hook.f., L. decemdentata (Willd.) Sm. var. angustifolia (Wall. ex Benth.) V.Singh, L. eriostoma Hook.f. var. lanata Hook.f., L. helicterifolia Haines, L. hyssopifolia Benth., L. lamiifolia Desf., L. lanata Benth., L. lanceaefolia Desf., L. longifolia Benth., L. montana (B. Heyne ex Roth) Spreng., L. prostrata (Hook.f.) Gamble, L. pubescens Benth., L. rosmarinifolia Benth., L. stelligera Wall. ex Benth., L. stricta Benth., L. suffruticosa Benth., L. vestita Benth. var. angustifolia Hook.f., L. vestita Benth. var. oblongifolia Hook.f., L. vestita Benth. var. sericostoma Hook.f. and L. wightiana Wall. ex Benth.