Phi Quang Dien
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1. INTRODUCTION
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Casuarina was introduced into Vietnam from unknown sources in 1896 (Nguyen Huu Hien, 1977). In Vietnam, it is called FILAO’ or PHILAO’ by people living in the north , XI LAU’ by people living in the northern central and DUONG by people living in the south and the southern central regions.
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The casuarina planted in Vietnam is C. equisetifolia<\/I> forest (Nguyen Huu Hien, 1977).
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C. equisetifolia<\/I>was first planted on sand at Nghe Tinh coast. It grew well and has been planted widely on coastal sand in other provinces since 1915.
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In Vietnam, this species is a moderate -sized tree, 20-25 m high, with straight stem, many branches and dense, pyramid shaped crown. Young branches are only 2 mm in diameter, soft, round and 10 -35 cm long. At each node there are minute leaf teeth in whorls of 5-8. The leaves do not photosynthesise; young branchlets are the photosynthetic organs.
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C. equisetifolia <\/I>trees in Vietnam are monoecious (individuals having male and female flowers) but there are some trees with male flowers only.
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The species needs complete light, is evergreen and grows all year. It grows very quickly in the rainy months.
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Casuarina grows well on heavy clay soils or soils derived from laterite.
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C. equisetifolia<\/I>fruit ripens in October and November. On the same tree there are both ripened and young fruit. Seeds are flat with a very thin wing. Growing on fertile soil, C. equisetifolia<\/I> can bear fruit from 3 years of age and from the age of 4 or 5 years it carries heavy crops.
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Seed weight differs from place to place 1.68 g at Ninh Chu in the south, 1,65 g at Non Nuoc in the southern central region, 1.45 g at Thach Lien in the central region to 1.29 g at Hai Thinh in the north.
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Casuarina was introduced into Vietnam from unknown sources in 1896 (Nguyen Huu Hien, 1977). In Vietnam, it is called FILAO’ or PHILAO’ by people living in the north , XI LAU’ by people living in the northern central and DUONG by people living in the south and the southern central regions.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/141"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=141"}],"version-history":[{"count":0,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/141\/revisions"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}