![](\"https:\/\/ifrad.vn\/media\/stories\/images\/sau-ghep.gif\")
<\/h3>\n<\/h3>\nName:<\/strong> The sau tree (Dracontomelum duperreanum Pierre<\/em>) belongs to the Anacardiaceae (mango) family. The grafted sau trees currently sold at the center\u2019s nursery are early-bearing, producing fruit within two years of planting. These trees offer significantly higher yields and better fruit quality than other sau varieties.<\/p>\n Uses:<\/strong> The wood of the sau tree is light-colored, flexible, and dense, with a specific gravity of 0.53. It has fine grains, attractive patterns, and natural resistance to termites, making it widely used in furniture making, plywood, and veneer production.<\/p>\n The most valuable economic aspect of the sau tree is its fruit. Sau fruit has a pleasantly sour taste and is used as a seasoning, in beverages, and for making confectionery such as \u00f4 mai<\/em> (preserved fruit snacks). A mature sau tree (8-10 years old) produces approximately 100-200 kg of fruit per year. Additionally, the flowers and fruit are used in traditional medicine to treat tooth decay.<\/p>\n Morphological Characteristics:<\/strong> Flowers are bisexual, yellow-green, with five sepals and ten stamens. The fruit is a round, slightly flattened drupe that is green when unripe and turns yellow when ripe. The flesh is not easily separated from the seed. The seed is woody with a rough surface. The tree flowers in April-May, and the fruit ripens in August-September.<\/p>\n Ecological Characteristics:<\/strong> Planting Season:<\/strong> The optimal planting time for grafted sau trees aligns with the local forest plantation schedule.<\/p>\n Planting Methods:<\/strong> Grafted sau trees can be planted as a monoculture or mixed with other species. Recommended spacing is 6x6m or 6x8m in areas with deep, moist soil.<\/p>\n Hole Preparation:<\/strong> Dig planting holes measuring 60x60x60cm (length x width x depth).<\/p>\n Fertilization:<\/strong> Apply 5 kg of well-decomposed manure and 0.2 kg of phosphate fertilizer per hole, mixing them evenly with one-third of the soil. Prepare the holes 15 days before planting.<\/p>\n Planting Technique:<\/strong><\/p>\n Use a sharp knife to remove the plastic nursery bag.<\/p>\n<\/li>\n Position the plant upright in the hole and backfill with soil. (Before planting, apply a 2-5 cm layer of clean soil to prevent young roots from coming into direct contact with fertilizers, which may cause root burn and plant death.)<\/p>\n<\/li>\n Firmly pack the soil around the base.<\/p>\n<\/li>\n Use three stakes to support the tree and prevent it from being knocked over by wind or animals.<\/p>\n<\/li>\n Immediately after planting, water the tree thoroughly.<\/p>\n<\/li>\n If dry or hot weather persists, provide shade for the young trees.<\/p>\n<\/li>\n<\/ul>\n Care and Maintenance:<\/strong><\/p>\n Regularly clear surrounding vegetation and climbing vines to prevent the tree from being strangled and to ensure optimal nutrient absorption.<\/p>\n<\/li>\n After clearing, loosen the soil around the base within a radius of 0.8-1m to improve aeration and prevent competition from weeds. This should be done 2-3 times per year.<\/p>\n<\/li>\n Apply fertilizers annually after weeding and tilling around the base.<\/p>\n<\/li>\n Adjust fertilizer amounts based on tree growth. Dig trenches around the tree in line with the canopy\u2019s projection, evenly distribute the fertilizer, cover it with soil, and water thoroughly.<\/p>\n<\/li>\n During the first 2-3 years, apply 0.2-0.5 kg of NPK fertilizer per tree, 2-3 times per year.<\/p>\n<\/li>\n Increase fertilizer quantities as the tree grows.<\/p>\n<\/li>\n<\/ul>\n Anthracnose Disease:<\/strong> Causes black rot on flowers, fruit drop, and black spots on fruit. Spray Benlat C or Score 250 EC weekly from flowering to two months afterward, then monthly.<\/p>\n Sooty Mold:<\/strong> Caused by secretion from scale insects. Control by spraying Bassa 50 EC, Trebon 2.5 EC, or copper-based fungicides.<\/p>\n Leaf Blight:<\/strong> Common during the rainy season, affecting leaves. Control by removing infected leaves and spraying Rhidomil MZ 72 WP or Kasumin 2L.<\/p>\n Stem and Branch Borers:<\/strong> These pests bore into the trunk and branches. Use light traps to capture adult insects and inject systemic insecticides such as Actara 25 WG or Padan 95 SP into the holes before sealing them with clay.<\/p>\n Green Leafhoppers:<\/strong> These pests secrete toxic substances that hinder tree growth. They are most active from October to June. Control using Bassa 50 EC or Trebon 2.5 EC.<\/p>\n Fruit Flies:<\/strong> These pests lay eggs under the fruit’s skin when it is nearly ripe. Their larvae feed on the fruit, causing rot and premature drop. Control using Sherpa 25 EC, L\u1ee5c S\u01a1n 0.26 DD, or Padan 95 SP.<\/p>\n Sau fruits reach full maturity about two months after they begin developing, but they are typically harvested when still green. At this stage, the fruit is mature enough to be stored for extended periods and is suitable for various culinary uses. The sau harvest season lasts approximately 2-3 months, from June to September each year.<\/p>\n","protected":false},"excerpt":{"rendered":" 1. Variety Description Name: The sau tree (Dracontomelum duperreanum Pierre) belongs to the Anacardiaceae (mango) family. The grafted sau trees currently sold at the center\u2019s nursery are early-bearing, producing fruit within two years of planting. These trees offer significantly higher yields and better fruit quality than other sau varieties. Uses: The wood of the sau […]<\/p>\n","protected":false},"author":5,"featured_media":2244,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114,134],"tags":[],"class_list":["post-2246","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fruit-trees","category-techniques-for-planting-and-caring-for-fruit-trees"],"_links":{"self":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2246","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2246"}],"version-history":[{"count":1,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2246\/revisions"}],"predecessor-version":[{"id":2247,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/posts\/2246\/revisions\/2247"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=\/wp\/v2\/media\/2244"}],"wp:attachment":[{"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ifs.edu.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
The sau tree is a large hardwood species, reaching 25-30m in height with a trunk diameter of 80-100cm. Its base has buttress roots with rough, dark gray bark that peels off in large flakes. Young branches are covered in brown hairs, while the undersides of leaves have yellowish-brown hairs. The leaves are pinnately compound with an odd number of leaflets, which grow alternately. The upper surface of the leaves is smooth, dark green, and has a mild sour taste. The tree is evergreen.<\/p>\n
Sau trees are large, long-lived, and evergreen with broad canopies. They adapt well to a wide range of ecological conditions, making them suitable for the soil and climate of northern Vietnam. The tree thrives in soils ranging from sandy loam to medium-textured clay that drains well, including alluvial soils along rivers and streams.<\/p>\n2. Planting and Care Techniques<\/h3>\n
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3. Pest and Disease Management<\/h3>\n
4. Harvesting<\/h3>\n