{"id":9863,"date":"2012-06-19T08:45:46","date_gmt":"2012-06-19T01:45:46","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2012\/06\/danh-gia-kha-nang-su-dung-hinh-so-tu-nhien-de-xac-dinh-the-tich-cho-mot-so-loai-cay-rung-tu-nhien-khai-thac-chu-yeu-o-vung-tay-nguyen\/"},"modified":"2015-05-19T13:29:08","modified_gmt":"2015-05-19T06:29:08","slug":"danh-gia-kha-nang-su-dung-hinh-so-tu-nhien-de-xac-dinh-the-tich-cho-mot-so-loai-cay-rung-tu-nhien-khai-thac-chu-yeu-o-vung-tay-nguyen","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/danh-gia-kha-nang-su-dung-hinh-so-tu-nhien-de-xac-dinh-the-tich-cho-mot-so-loai-cay-rung-tu-nhien-khai-thac-chu-yeu-o-vung-tay-nguyen\/","title":{"rendered":"\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch cho m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y r\u1eebng t\u1ef1 nhi\u00ean khai th\u00e1c ch\u1ee7 y\u1ebfu \u1edf v\u00f9ng T\u00e2y Nguy\u00ean"},"content":{"rendered":"<p><strong>Ph\u00f9ng Nhu\u1ec7 Giang, V\u0169 Ti\u1ebfn Hinh<\/strong><\/p>\n<p><em>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/em><\/p>\n<p>&nbsp;<\/p>\n<p><strong>T\u00d3M T\u1eaeT<\/strong><\/p>\n<p>Ph\u01b0\u01a1ng ph\u00e1p t\u00ednh th\u1ec3 t\u00edch th\u00e2n c\u00e2y \u0111\u1ee9ng d\u1ef1a v\u00e0o h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn \u1edf Vi\u1ec7t Nam. Tuy v\u1eady, ri\u00eang \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng t\u1ef1 nhi\u00ean \u1edf T\u00e2y Nguy\u00ean vi\u1ec7c nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01<\/sub> \u0111\u1ec3 l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch n\u00f3i ri\u00eang v\u00e0 t\u00ednh th\u1ec3 t\u00edch c\u00e2y \u0111\u1ee9ng n\u00f3i chung c\u00f2n \u00edt \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp. T\u1eeb s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra c\u1ee7a 1556 c\u00e2y ng\u1ea3 thu\u1ed9c 29 lo\u00e0i c\u00e2y \u1edf V\u00f9ng T\u00e2y Nguy\u00ean, qua ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u, thu \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 ch\u00ednh sau: H\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01<\/sub> c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y nghi\u00ean c\u1ee9u v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 tu\u00e2n theo lu\u1eadt chu\u1ea9n. Gi\u1eefa \u0111\u01b0\u1eddng k\u00ednh \u0111o \u1edf v\u1ecb tr\u00ed m\u1ed9t ph\u1ea7n m\u01b0\u1eddi chi\u1ec1u cao th\u00e2n c\u00e2y v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c c\u00f3 m\u1ed1i li\u00ean h\u1ec7 theo d\u1ea1ng tuy\u1ebfn t\u00ednh \u1edf m\u1ee9c r\u1ea5t ch\u1eb7t. Khi x\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch th\u00e2n c\u00e2y tr\u00ean c\u01a1 s\u1edf h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01<\/sub> th\u00ec sai s\u1ed1 t\u1ed5ng th\u1ec3 t\u00edch c\u1ee7a t\u1eebng lo\u00e0il\u1edbn nh\u1ea5t b\u1eb1ng 3,93%, trung b\u00ecnh l\u00e0 1,75%, sai s\u1ed1 b\u00ecnh qu\u00e2n v\u1ec1 th\u1ec3 t\u00edch \u1edf c\u00e2y \u0111\u01a1n l\u1ebb nh\u1ecf h\u01a1n 10% v\u00e0 sai s\u1ed1 l\u1edbn nh\u1ea5t v\u1ec1 th\u1ec3 t\u00edch \u1edf c\u00e2y \u0111\u01a1n l\u1ebb kh\u00f4ng v\u01b0\u1ee3t 10%.<\/p>\n<p><strong>T\u1eeb kh\u00f3a<\/strong>: H\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean, Th\u1ec3 t\u00edch c\u00e2y \u0111\u1ee9ng, Sai s\u1ed1 th\u1ec3 t\u00edch, Ph\u00e2n b\u1ed1 chu\u1ea9n.<\/p>\n<p><strong>\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong><\/p>\n<p>Khi l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch c\u00e2y \u0111\u1ee9ng cho \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng tr\u1ed3ng v\u00e0 r\u1eebng t\u1ef1 nhi\u00ean, ngo\u00e0i ph\u01b0\u01a1ng ph\u00e1p d\u1ef1a v\u00e0o ph\u01b0\u01a1ng tr\u00ecnh th\u1ec3 t\u00edch, ph\u01b0\u01a1ng ph\u00e1p d\u1ef1a v\u00e0o c\u00e1c nh\u00e2n t\u1ed1 c\u1ea5u th\u00e0nh th\u1ec3 t\u00edch c\u0169ng hay \u0111\u01b0\u1ee3c v\u1eadn d\u1ee5ng. C\u00e1c nh\u00e2n t\u1ed1 c\u1ea5u th\u00e0nh th\u1ec3 t\u00edch bao g\u1ed3m: \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao v\u00e0 h\u00ecnh s\u1ed1, trong \u0111\u00f3 h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u01b0\u1ee3c v\u1eadn d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t so v\u1edbi c\u00e1c lo\u1ea1i h\u00ecnh s\u1ed1 kh\u00e1c.Vi\u1ec7c x\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch th\u00e2n c\u00e2y \u0111\u1ee9ng th\u00f4ng quah\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01\u00ad<\/sub> \u0111\u00e3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i v\u00e0 n\u1ed5i b\u1eadt l\u00e0 c\u00e1c c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u c\u1ee7a \u0110\u1ed3ng S\u0129 Hi\u1ec1n (1974) [1] v\u1ec1 l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch v\u00e0 bi\u1ec3u \u0111\u1ed9 thon c\u00e2y \u0111\u1ee9ng cho \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng t\u1ef1 nhi\u00ean Vi\u1ec7t Nam, V\u0169 Nh\u00e2m (1988) [4] v\u1ec1 l\u1eadp bi\u1ec3u s\u1ea3n ph\u1ea9m g\u1ed7 m\u1ecf cho r\u1eebng Th\u00f4ng m\u00e3 v\u0129 v\u00f9ng \u0110\u00f4ng B\u1eafc Vi\u1ec7t Nam, Nguy\u1ec5n Ng\u1ecdc Lung, \u0110\u00e0o C\u00f4ng Khanh (1999) [ 3]v\u1ec1 l\u1eadp bi\u1ec3u s\u1ea3n ph\u1ea9m cho r\u1eebng Th\u00f4ng ba l\u00e1, V\u0169 Ti\u1ebfn Hinh (2000) [2] v\u1ec1 l\u1eadp bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng r\u1eebng Qu\u1ebf \u1edf V\u0103n Y\u00ean, Y\u00ean B\u00e1i. Ri\u00eang \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng t\u1ef1 nhi\u00ean \u1edf T\u00e2y Nguy\u00ean vi\u1ec7c nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01<\/sub> \u0111\u1ec3 l\u1eadp bi\u1ec3u th\u1ec3 t\u00edch n\u00f3i ri\u00eang v\u00e0 t\u00ednh th\u1ec3 t\u00edch c\u00e2y \u0111\u1ee9ng n\u00f3i chung c\u00f2n \u00edt \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp. Xu\u1ea5t ph\u00e1t t\u1eeb th\u1ef1c t\u1ebf \u0111\u00f3, nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh nh\u1eb1m \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng h\u00ecnh s\u1ed1 t\u1ef1 nhi\u00ean f<sub>01<\/sub> \u0111\u1ec3 t\u00ednh th\u1ec3 t\u00edch cho m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y khai th\u00e1c ch\u1ee7 y\u1ebfu \u1edf v\u00f9ng T\u00e2y Nguy\u00ean.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><!--[if gte mso 9]><xml>\n<w:WordDocument>\n<w:View>Normal<\/w:View>\n<w:Zoom>0<\/w:Zoom>\n<w:PunctuationKerning\/>\n<w:ValidateAgainstSchemas\/>\n<w:SaveIfXMLInvalid>false<\/w:SaveIfXMLInvalid>\n<w:IgnoreMixedContent>false<\/w:IgnoreMixedContent>\n<w:AlwaysShowPlaceholderText>false<\/w:AlwaysShowPlaceholderText>\n<w:Compatibility>\n<w:BreakWrappedTables\/>\n<w:SnapToGridInCell\/>\n<w:WrapTextWithPunct\/>\n<w:UseAsianBreakRules\/>\n<w:DontGrowAutofit\/>\n<\/w:Compatibility>\n<w:BrowserLevel>MicrosoftInternetExplorer4<\/w:BrowserLevel>\n<\/w:WordDocument>\n<\/xml><![endif]--><!--[if gte mso 9]><xml>\n<w:LatentStyles DefLockedState=\"false\" LatentStyleCount=\"156\">\n<\/w:LatentStyles>\n<\/xml><![endif]--><!--[if gte mso 10]>\n\n\n<style>\n\/* Style Definitions *\/\ntable.MsoNormalTable\n{mso-style-name:\"Table Normal\";\nmso-tstyle-rowband-size:0;\nmso-tstyle-colband-size:0;\nmso-style-noshow:yes;\nmso-style-parent:\"\";\nmso-padding-alt:0cm 5.4pt 0cm 5.4pt;\nmso-para-margin:0cm;\nmso-para-margin-bottom:.0001pt;\nmso-pagination:widow-orphan;\nfont-size:10.0pt;\nfont-family:\"Times New Roman\";\nmso-ansi-language:#0400;\nmso-fareast-language:#0400;\nmso-bidi-language:#0400;}\n<\/style>\n\n\n<![endif]--><\/p>\n<div align=\"justify\">\n<span style=\"font-size: 10pt; font-family: Arial\">Ph\u01b0\u01a1ng ph&aacute;p t&iacute;nh th\u1ec3 t&iacute;ch<br \/>\nth&acirc;n c&acirc;y \u0111\u1ee9ng d\u1ef1a v&agrave;o h&igrave;nh s\u1ed1 t\u1ef1 nhi&ecirc;n \u0111&atilde; \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn \u1edf Vi\u1ec7t Nam.<br \/>\nTuy v\u1eady, ri&ecirc;ng \u0111\u1ed1i t\u01b0\u1ee3ng r\u1eebng t\u1ef1 nhi&ecirc;n \u1edf T&acirc;y Nguy&ecirc;n vi\u1ec7c nghi&ecirc;n c\u1ee9u s\u1eed d\u1ee5ng<br \/>\nh&igrave;nh s\u1ed1 t\u1ef1 nhi&ecirc;n f<sub>01<\/sub> \u0111\u1ec3 l\u1eadp bi\u1ec3u th\u1ec3 t&iacute;ch n&oacute;i ri&ecirc;ng v&agrave; t&iacute;nh th\u1ec3 t&iacute;ch<br \/>\nc&acirc;y \u0111\u1ee9ng n&oacute;i chung c&ograve;n &iacute;t \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp. T\u1eeb s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra c\u1ee7a 1556 c&acirc;y ng\u1ea3<br \/>\nthu\u1ed9c 29 lo&agrave;i c&acirc;y \u1edf V&ugrave;ng T&acirc;y Nguy&ecirc;n, qua ph&acirc;n t&iacute;ch s\u1ed1 li\u1ec7u, thu \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 k\u1ebft<br \/>\nqu\u1ea3 ch&iacute;nh sau: H&igrave;nh s\u1ed1 t\u1ef1 nhi&ecirc;n f<sub>01<\/sub> c\u1ee7a c&aacute;c lo&agrave;i c&acirc;y nghi&ecirc;n c\u1ee9u v\u1ec1<br \/>\nc\u01a1 b\u1ea3n kh&ocirc;ng ph\u1ee5 thu\u1ed9c v&agrave;o \u0111\u01b0\u1eddng k&iacute;nh, chi\u1ec1u cao v&agrave; tu&acirc;n theo lu\u1eadt chu\u1ea9n.<\/span>\n<\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9863"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=9863"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9863\/revisions"}],"predecessor-version":[{"id":15219,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9863\/revisions\/15219"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}