{"id":8964,"date":"2009-04-20T08:10:06","date_gmt":"2009-04-20T01:10:06","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/04\/buoc-dau-nghien-cuu-nang-cao-khoi-luong-the-tich-go-hong-paulownia-fortunei\/"},"modified":"2013-10-06T09:00:57","modified_gmt":"2013-10-06T02:00:57","slug":"buoc-dau-nghien-cuu-nang-cao-khoi-luong-the-tich-go-hong-paulownia-fortunei","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/buoc-dau-nghien-cuu-nang-cao-khoi-luong-the-tich-go-hong-paulownia-fortunei\/","title":{"rendered":"B\u01b0\u1edbc \u0111\u1ea7u nghi\u00ean c\u1ee9u n\u00e2ng cao kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch g\u1ed7 H\u00f4ng ( Paulownia fortunei)"},"content":{"rendered":"\n

B\u00f9i Duy Ng\u1ecdc, Nguy\u1ec5n \u0110\u00ecnh H\u1ee3i<\/strong> <\/p>\n

Nguy\u1ec5n Th\u1ecb Minh Xu\u00e2n<\/strong> <\/p>\n

Vi\u1ec7n khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em> <\/p>\n

T\u00d3M T\u1eaeT<\/strong> <\/p>\n

G\u1ed7 H\u00f4ng c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 \u00edt b\u1ecb cong v\u00eanh, bi\u1ebfn d\u1ea1ng\u2026 nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng s\u1eed d\u1ee5ng trong gia c\u00f4ng ch\u1ebf bi\u1ebfn b\u1edfi v\u00ec: g\u1ed7 H\u00f4ng nh\u1eb9, x\u1ed1p, kh\u00f4ng l\u00e0m \u0111\u01b0\u1ee3c c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 t\u00ednh ch\u1ecbu l\u1ef1c cao. \u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u01b0\u1ee3c \u0111i\u1ec3m nh\u1eb9 x\u1ed1p c\u1ee7a g\u1ed7 H\u00f4ng, ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u th\u0103m d\u00f2 n\u00e2ng cao kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch. Khi d\u00f9ng keo P \u2013 F \u0111\u1ec3 t\u1ea9m v\u00e0o g\u1ed7 h\u00f4ng (t\u1ea9m b\u1eb1ng \u00e1p l\u1ef1c) sau \u0111\u00f3 \u00e9p nhi\u1ec7t, c\u00e1c m\u1eabu th\u00ed nghi\u1ec7m tr\u01b0\u1edbc khi \u00e9p c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch trung b\u00ecnh l\u00e0: 0,27 g\/cm3<\/sup>, sau khi \u00e9p c\u00e1c m\u1eabu th\u00ed nghi\u1ec7m c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch trung b\u00ecnh l\u00e0 0,525 g\/cm3<\/sup>. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch c\u1ee7a m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 th\u00f4ng th\u01b0\u1eddng hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c. <\/p>\n

T\u1eeb kho\u00e1:<\/strong> N\u00e2ng cao kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch, g\u1ed7 H\u00f4ng. <\/p>\n

M\u1ede \u0110\u1ea6U<\/strong> <\/p>\n

<\/strong>C\u00e2y H\u00f4ng (Paulownia fortunei)<\/em>c\u00f3 ph\u00e2n b\u1ed1 r\u1ed9ng \u1edf nhi\u1ec1u t\u1ec9nh ph\u00eda b\u1eafc Vi\u1ec7t Nam, t\u1eadp trung ch\u1ee7 y\u1ebfu \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh thu\u1ed9c v\u00f9ng T\u00e2y b\u1eafc v\u00e0 \u0110\u00f4ng b\u1eafc nh\u01b0S\u01a1n La, Lai Ch\u00e2u, Y\u00ean B\u00e1i, L\u00e0o Cai, Ph\u00fa Th\u1ecd, L\u1ea1ng S\u01a1n, Qu\u1ea3ng Ninh, H\u00e0 Giang, B\u1eafc C\u1ea1n… (K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra c\u1ee7a ph\u00f2ng k\u1ef9 thu\u1eadt l\u00e2m sinh, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam).<\/em>V\u1ec1 nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng g\u1ed7 H\u00f4ng (Paulownia fortunei)<\/em> Nh\u1eefng nghi\u00ean c\u1ee9u c\u1ee7a Trung Qu\u1ed1c \u0111\u00e3 \u0111\u1ec1 ra h\u01b0\u1edbng c\u00f4ng ngh\u1ec7 s\u1eed d\u1ee5ng g\u1ed7 H\u00f4ng nh\u01b0:Trong x\u00e2y d\u1ef1ng nh\u00e0 c\u1eeda, \u0111\u1ec1n ch\u00f9a: g\u1ed7 H\u00f4ng tuy c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a g\u1ed7 kh\u00f4ng cao nh\u01b0ng v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00ec n\u00f3 \u1ed5n \u0111\u1ecbnh h\u00ecnh d\u1ea1ng. Trong c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t v\u00e1n nh\u00e2n t\u1ea1o, nhi\u1ec1u nh\u00e0 m\u00e1y \u1edf Trung Qu\u1ed1c s\u1ea3n xu\u1ea5t th\u1eed nghi\u1ec7m v\u00e1n m\u1ecfng c\u00f3 chi\u1ec1u d\u00e0y 1,2-1,4 mm \u0111\u1ea1t k\u1ebft qu\u1ea3 kh\u1ea3 quan, n\u1ebfu \u0111\u1ed9 nh\u1edbt c\u1ee7a keo ph\u00f9 h\u1ee3p th\u00ec n\u00f3 kh\u00f4ng t\u1ea1o th\u00e0nh v\u1ebft loang. V\u00e1n t\u1ed5ng h\u1ee3p c\u00f3 l\u1edbp m\u1eb7t t\u1eeb g\u1ed7 H\u00f4ng v\u00e0 v\u00e1n d\u00e1n c\u00f3 th\u1ec3 d\u00f9ng v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn cho \u0111\u1ed3 m\u1ed9c, trong trang tr\u00ed n\u1ed9i th\u1ea5t v\u00e0 nhi\u1ec1u lo\u1ea1i bao b\u00ec… ng\u01b0\u1eddi ta mong mu\u1ed1ng\u1ed7 H\u00f4ng (Paulownia fortunei)<\/em> s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng lo\u1ea1i c\u00e2y quan tr\u1ecdng nh\u1ea5t cho vi\u1ec7c s\u1ea3n xu\u1ea5t v\u00e1n m\u1ecfng v\u00e0 v\u00e1n d\u00e1n \u1edf Trung Qu\u1ed1c. <\/p>\n

C\u1eadp nh\u1eadt t\u1ea1i \u0111\u00e2y<\/a><\/u><\/strong> <\/p>\n","protected":false},"excerpt":{"rendered":"

\n \n<\/p>\n

        G\u1ed7 Hông có \u01b0u \u0111i\u1ec3m là ít b\u1ecb cong vênh, bi\u1ebfn d\u1ea1ng… nh\u01b0ng không \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng s\u1eed d\u1ee5ng trong gia công ch\u1ebf bi\u1ebfn b\u1edfi vì: g\u1ed7 Hông nh\u1eb9, x\u1ed1p, không làm \u0111\u01b0\u1ee3c các s\u1ea3n ph\u1ea9m có tính ch\u1ecbu l\u1ef1c cao. <\/span>\u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u01b0\u1ee3c \u0111i\u1ec3m nh\u1eb9 x\u1ed1p c\u1ee7a g\u1ed7 Hông, ti\u1ebfn hành nghiên c\u1ee9u th\u0103m dò nâng cao kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 tích. Khi dùng keo P – F \u0111\u1ec3 t\u1ea9m vào g\u1ed7 hông (t\u1ea9m b\u1eb1ng áp l\u1ef1c) sau \u0111ó ép nhi\u1ec7t, các m\u1eabu thí nghi\u1ec7m tr\u01b0\u1edbc khi ép có kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 tích trung bình là: 0,27 g\/cm3<\/sup>, sau khi ép các m\u1eabu thí nghi\u1ec7m có kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 tích trung bình là 0,525 g\/cm3<\/sup>. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 tích này t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 tích c\u1ee7a m\u1ed9t s\u1ed1 lo\u1ea1i g\u1ed7 thông th\u01b0\u1eddng hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng làm nguyên li\u1ec7u s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c.<\/span> <\/p>\n

\n <\/p>\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\/8964"}],"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=8964"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8964\/revisions"}],"predecessor-version":[{"id":10420,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8964\/revisions\/10420"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}