C\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p to\u00e0n c\u1ea7u, nhu c\u1ea7u qu\u00e1 \u0111\u1ed9 v\u1ec1 l\u01b0\u01a1ng th\u1ef1c, nhi\u00ean li\u1ec7u v\u00e0 coi nh\u1eb9 v\u1ea5n \u0111\u1ec1 m\u00f4i tr\u01b0\u1eddng c\u1ee7a con ng\u01b0\u1eddi, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng sa m\u1ea1c h\u00f3a ng\u00e0y m\u1ed9t nghi\u00eam tr\u1ecdng. C\u00e1t sa m\u1ea1c d\u1ea7n d\u1ea7n x\u00e2m chi\u1ebfm th\u1ea3o nguy\u00ean, b\u00e3i c\u1ecf c\u0169ng t\u1eebng b\u01b0\u1edbc ti\u1ebfn v\u00e0o th\u00e0nh ph\u1ed1 th\u1ecb tr\u1ea5n m\u00e0 con ng\u01b0\u1eddi \u0111ang sinh s\u1ed1ng.<\/p>\n\n\n\n
\u0110\u1ec3 ng\u0103n ch\u1eb7n v\u00e0 gi\u1ea3m b\u1edbt s\u1ef1 b\u00e0nh tr\u01b0\u1edbng c\u1ee7a sa m\u1ea1c, con ng\u01b0\u1eddi \u0111\u00e3 tr\u1ed3ng nh\u1eefng c\u00e1nh r\u1eebng ph\u00f2ng h\u1ed9, t\u1eadp trung nghi\u00ean c\u1ee9u tr\u1ed3ng c\u00e2y ch\u1ed1ng gi\u00f3 ng\u0103n c\u00e1t. M\u1ed9t v\u1ecb ki\u1ebfn tr\u00fac s\u01b0 ng\u01b0\u1eddi T\u00e2y Ban Nha \u0111\u00e3 c\u00f3 m\u1ed9t s\u00e1ng ki\u1ebfn b\u1ea5t ng\u1edd, d\u00f9ng nh\u1eefng c\u00e1nh r\u1eebng c\u00e2y nh\u1ef1a nh\u00e2n t\u1ea1o c\u00f3 th\u1ec3 l\u00e0m xanh h\u00f3a sa m\u1ea1c, h\u01a1n n\u1eefa \u00f4ng \u0111\u00e3 ti\u1ebfn h\u00e0nh th\u00ed nghi\u1ec7m th\u00e0nh c\u00f4ng v\u1ec1 vi\u1ec7c tr\u1ed3ng c\u00e2y nh\u1ef1a \u1edf B\u1ec9.<\/p>\n\n\n\n
C\u00e2y nh\u1ef1a t\u1ea1i sao c\u00f3 th\u1ec3 xanh h\u00f3a sa m\u1ea1c? C\u00e2y nh\u1ef1a nh\u00e2n t\u1ea1o kh\u00f4ng nh\u1eefng gi\u1ed1ng c\u00e2y t\u1ef1 nhi\u00ean v\u1ec1 h\u00ecnh d\u00e1ng m\u00e0 k\u1ebft c\u1ea5u v\u00e0 ch\u1ee9c n\u0103ng b\u00ean trong c\u0169ng c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a th\u1ef1c v\u1eadt m\u00e0u xanh.<\/p>\n\n\n\n
Ch\u00fang c\u00f3 r\u1ec5 c\u00e2y, th\u00e2n c\u00e2y, c\u00e0nh c\u00e2y v\u00e0 l\u00e1 c\u00e2y, trong r\u1ec5 v\u00e0 th\u00e2n c\u00e2y ch\u1ee9a \u0111\u1ea7y nh\u1eefng polyurethane, c\u00f2n c\u00e0nh v\u00e0 l\u00e1 d\u00f9ng nh\u1ef1a phenolic t\u1ea1o th\u00e0nh. Nh\u1ef1a polyurethane c\u00f3 r\u1ea5t nhi\u1ec1u v\u00e2n r\u00e3nh, n\u00f3 c\u00f3 t\u00e1c d\u1ee5ng nh\u01b0 c\u00e1c mao m\u1ea1ch, c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 n\u01b0\u1edbc \u1edf trong l\u00f2ng \u0111\u1ea5t. Nh\u1ef1a b\u1ecdt phenolic th\u00ec c\u00f3 t\u00e1c d\u1ee5ng thu th\u1eadp l\u01b0\u1ee3ng n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng gi\u1ecdt s\u01b0\u01a1ng \u0111\u00eam v\u00e0 v\u00e0o ban ng\u00e0y c\u00f3 th\u1ec3 th\u00fac \u0111\u1ea9y s\u1ef1 bay h\u01a1i c\u1ee7a gi\u1ecdt s\u01b0\u01a1ng. T\u00e1c d\u1ee5ng \u0111i\u1ec1u ti\u1ebft kh\u00ed h\u1eadu n\u00e0y g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n gi\u1ed1ng c\u00e2y t\u1ef1 nhi\u00ean.<\/p>\n\n\n\n
Lo\u1ea1i c\u00e2y nh\u1ef1a n\u00e0y cao 7 – 10 m, ch\u00fang c\u00f3 b\u1ed9 r\u1ec5 \u0111\u1eb7c bi\u1ec7t l\u1edbn. B\u1ed9 r\u1ec5 s\u1ebd t\u1ea1o th\u00e0nh gi\u00e1 m\u00e1y \u1ea3nh, c\u00f3 ba ch\u00e2n \u0111\u1ee1, sau khi c\u1eafm v\u00e0o \u0111\u1ea5t c\u00e1t r\u1ea5t ch\u1eafc ch\u1eafn. H\u01a1n n\u1eefa b\u1ed9 ph\u1eadn b\u00ean trong c\u1ee7a r\u1ec5 c\u00e2y l\u00e0 \u1ed1ng r\u1ed7ng, sau khi d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p cao \u00e1p r\u00f3t ch\u1ea5t polyurethane v\u00e0o, ch\u1ea5t n\u00e0y s\u1ebd t\u1eeb trong c\u00e1c l\u1ed7 nh\u1ecf tr\u00ean th\u00e0nh \u1ed1ng thu\u1ed9c b\u1ed9 r\u1ec5 th\u1ea5m ra, v\u01b0\u01a1n d\u00e0i ra xa s\u00e2u trong l\u00f2ng \u0111\u1ea5t. \u0110\u1ee3i \u0111\u1ebfn khi ch\u1ea5t polyurethane \u0111\u00f4ng ch\u1eafc l\u1ea1i, s\u1ebd h\u00ecnh th\u00e0nh b\u1ed9 r\u1ec5 cao su kh\u1ed5ng l\u1ed3, c\u00e2y cao su s\u1ebd c\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn trong \u0111\u1ea5t c\u00e1t, nh\u01b0 th\u1ebf s\u1ebd c\u00f3 th\u1ec3 c\u1ea3n nh\u1eefng c\u01a1n gi\u00f3 c\u00e1t m\u1ea1nh \u1edf nh\u1eefng v\u00f9ng sa m\u1ea1c. Ngo\u00e0i ra nh\u1eefng r\u1ec5 nh\u1ecf c\u00f2n c\u00f3 th\u1ec3 l\u1ea5y \u0111\u01b0\u1ee3c nh\u1eefng gi\u1ecdt n\u01b0\u1edbc d\u01b0\u1edbi s\u00e2u trong \u0111\u1ea5t v\u00e0 chuy\u1ec3n l\u00ean l\u00e1, cu\u1ed1i c\u00f9ng bay h\u01a1i d\u01b0\u1edbi \u00e1nh n\u1eafng M\u1eb7t Tr\u1eddi, gi\u00fap cho kh\u00f4ng kh\u00ed xung quanh \u1ea9m \u01b0\u1edbt h\u01a1n.<\/p>\n\n\n\n
\u01afu \u0111i\u1ec3m l\u1edbn nh\u1ea5t c\u1ee7a c\u00e2y nh\u1ef1a \u0111\u01b0\u01a1ng nhi\u00ean l\u00e0 kh\u00f4ng th\u1ec3 \u201cch\u1ebft kh\u00f4\u201d, b\u00f3ng c\u00e2y \u0111\u1ed5 xu\u1ed1ng gi\u00fap cho nhi\u1ec7t \u0111\u1ed9 xung quanh gi\u1ea3m xu\u1ed1ng. N\u1ebfu tr\u1ed3ng v\u1edbi di\u1ec7n t\u00edch l\u1edbn, s\u1ebd h\u00ecnh th\u00e0nh m\u1ed9t b\u1ea7u kh\u00f4ng kh\u00ed l\u1ea1nh tr\u00ean kh\u00f4ng trung, t\u0103ng kh\u1ea3 n\u0103ng c\u00f3 m\u01b0a. N\u1ebfu c\u00e2y nh\u1ef1a \u0111\u01b0\u1ee3c tr\u1ed3ng xen k\u1ebd v\u1edbi c\u00e1c c\u00e2y t\u1ef1 nhi\u00ean \u1edf m\u1ed9t m\u1ee9c \u0111\u1ed9 n\u00e0o \u0111\u00f3 s\u1ebd c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111i\u1ec1u ki\u1ec7n sinh s\u1ed1ng c\u1ee7a c\u00e2y t\u1ef1 nhi\u00ean. H\u01a1n n\u1eefa, v\u1edbi c\u00e2y nh\u1ef1a l\u00e0m \u201c\u0111\u1ed9i qu\u00e2n ti\u1ec1n tr\u1ea1m\u201d c\u1ea3i t\u1ea1o sa m\u1ea1c, s\u1ebd c\u00f3 th\u1ec3 tr\u1ed3ng nh\u1eefng c\u00e2y nh\u1ecf b\u00e9 h\u01a1n \u1edf ph\u00eda d\u01b0\u1edbi, v\u1ec1 c\u01a1 b\u1ea3n c\u1ea3i thi\u1ec7n kh\u00ed h\u1eadu v\u00e0 th\u1ed5 nh\u01b0\u1ee1ng c\u1ee7a sa m\u1ea1c, cu\u1ed1i c\u00f9ng s\u1ebd th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau bi\u1ebfn sa m\u1ea1c th\u00e0nh l\u1ee5c \u0111\u1ecba xanh.<\/p>\n","protected":false},"excerpt":{"rendered":"
C\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p to\u00e0n c\u1ea7u, nhu c\u1ea7u qu\u00e1 \u0111\u1ed9 v\u1ec1 l\u01b0\u01a1ng th\u1ef1c, nhi\u00ean li\u1ec7u v\u00e0 coi nh\u1eb9 v\u1ea5n \u0111\u1ec1 m\u00f4i tr\u01b0\u1eddng c\u1ee7a con ng\u01b0\u1eddi, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng sa m\u1ea1c h\u00f3a ng\u00e0y m\u1ed9t nghi\u00eam tr\u1ecdng. C\u00e1t sa m\u1ea1c d\u1ea7n d\u1ea7n x\u00e2m chi\u1ebfm th\u1ea3o nguy\u00ean, b\u00e3i c\u1ecf c\u0169ng t\u1eebng b\u01b0\u1edbc […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,19],"tags":[],"class_list":["post-9742","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9742"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9742\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}