Trong cu\u1ed9c s\u1ed1ng c\u1ee7a ch\u00fang ta, h\u1ea7u nh\u01b0 h\u00e0ng ng\u00e0y \u0111\u1ec1u g\u1eb7p g\u1ee1 v\u1edbi cao su, v\u00ed d\u1ee5 ra kh\u1ecfi nh\u00e0 \u0111i xe \u0111\u1ea1p, \u0111\u00e1p \u00f4 t\u00f4 bu\u00fdt v\u00e0 c\u1ea3 l\u00e1i m\u00e1y k\u00e9o\u2026 l\u1ed1p c\u1ee7a nh\u1eefng chi\u1ebfc xe n\u00e0y \u0111\u1ec1u \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb cao su. B\u00f3ng r\u1ed5, b\u00f3ng chuy\u1ec1n ho\u1eb7c b\u00f3ng \u0111\u00e1 trong ho\u1ea1t \u0111\u1ed9ng th\u1ec3 thao, ru\u1ed9t b\u00f3ng c\u0169ng l\u00e0 d\u00f9ng cao su t\u1ea1o ra. C\u00f2n c\u00f3 gi\u1ea7y \u0111i m\u01b0a ch\u1ebf t\u1ea1o t\u1eeb cao su v\u00e0 c\u1ea3 \u0111\u1ed3 \u0111\u1ef1ng thu\u1ed1c\u2026 T\u1ea5t nhi\u00ean c\u00f4ng d\u1ee5ng c\u1ee7a cao su kh\u00f4ng ch\u1ec9 d\u1eebng \u1edf \u0111\u00f3, ng\u00e0nh c\u00f4ng nghi\u1ec7p qu\u1ed1c ph\u00f2ng, ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n kh\u00ed, ng\u00e0nh c\u00f4ng nghi\u1ec7p m\u00e1y m\u00f3c\u2026 \u0111\u1ec1u kh\u00f4ng t\u00e1ch r\u1eddi cao su.<\/p>\n\n\n\n
Cao su \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb \u0111\u00e2u? Cao su c\u00f3 hai ngu\u1ed3n: m\u1ed9t l\u00e0 cao su t\u1ef1 nhi\u00ean, hai l\u00e0 cao su nh\u00e2n t\u1ea1o.<\/p>\n\n\n\n
Cao su nh\u00e2n t\u1ea1o \u0111\u00fang theo ngh\u0129a c\u1ee7a n\u00f3, l\u00e0 do con ng\u01b0\u1eddi t\u1ea1o ra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc. Cao su t\u1ef1 nhi\u00ean l\u1ea5y t\u1eeb c\u00e2y cao su, \u0111\u1ed7 tr\u1ecdng, c\u1ecf cao su\u2026 Trong s\u1ea3n xu\u1ea5t m\u1ee7 cao su nhi\u1ec1u nh\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t nh\u1ea5t \u0111\u00f3 ph\u1ea3i k\u1ec3 \u0111\u1ebfn c\u00e2y cao su ba l\u00e1 hay c\u00f2n c\u00f3 c\u00e1i t\u00ean \u201cvua c\u1ee7a cao su\u201d.<\/p>\n\n\n\n
V\u1ecb \u201cvua c\u1ee7a cao su\u201d n\u00e0y v\u1ed1n kh\u00f4ng ph\u1ea3i n\u01a1i n\u00e0o c\u0169ng sinh tr\u01b0\u1edfng v\u00e0 l\u1ea5y m\u1ee7 \u0111\u01b0\u1ee3c, ch\u1ec9 c\u1ea7n trong m\u1ed9t n\u0103m c\u00f3 m\u1ea5y h\u00f4m nhi\u1ec7t \u0111\u1ed9 h\u1ea1 xu\u1ed1ng d\u01b0\u1edbi 5oC hay d\u01b0\u1edbi 0oC s\u1ebd khi\u1ebfn c\u1ea3 lo\u1ea1t c\u00e2y cao su con ch\u1ebft c\u00f3ng. \u0110\u00f3 l\u00e0 nguy\u00ean nh\u00e2n g\u00ec?<\/p>\n\n\n\n
M\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u bi\u1ebft, \u0111\u1eb7c t\u00ednh c\u1ee7a th\u1ef1c v\u1eadt \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1eeb s\u1ef1 th\u00edch nghi d\u1ea7n d\u1ea7n v\u1edbi m\u00f4i tr\u01b0\u1eddng t\u1ef1 nhi\u00ean trong th\u1eddi gian d\u00e0i. Kh\u00ed h\u1eadu \u1edf hai v\u00f9ng Nam B\u1eafc c\u00f3 s\u1ef1 ch\u00eanh l\u1ec7ch nhau, th\u1ef1c v\u1eadt sinh tr\u01b0\u1edfng \u1edf hai v\u00f9ng kh\u00ed h\u1eadu kh\u00e1c nhau \u0111\u00e3 h\u00ecnh th\u00e0nh kh\u1ea3 n\u0103ng th\u00edch nghi nh\u1ea5t \u0111\u1ecbnh: th\u1ef1c v\u1eadt \u1edf ph\u00eda B\u1eafc trong m\u00f9a \u0111\u00f4ng gi\u00e1 l\u1ea1nh c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c s\u01b0\u01a1ng gi\u00e1, ch\u1ecbu \u0111\u01b0\u1ee3c gi\u00f3 r\u00e9t, \u0111\u00f4ng \u0111i xu\u00e2n \u0111\u1ebfn, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ea1nh r\u1ea5t t\u1ed1t; th\u1ef1c v\u1eadt \u1edf ph\u00eda Nam b\u1ed1n m\u00f9a \u0111\u1ec1u kho\u00e1c m\u1ed9t chi\u1ebfc \u00e1o xanh, g\u1eb7p nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n 5oC l\u00e0 s\u1ebd ch\u1ecbu kh\u00f4ng n\u1ed5i, ho\u1eb7c l\u00e1 c\u00e0nh b\u1ecb cong ho\u1eb7c c\u1ea3 th\u00e2n s\u1ebd ch\u1ebft c\u00f3ng. N\u0103m 1904, c\u00e2y cao su m\u1edbi t\u1eeb n\u01b0\u1edbc ngo\u00e0i chuy\u1ec3n sang tr\u1ed3ng t\u1ea1i Trung Qu\u1ed1c, ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00f3 l\u00e0 v\u00f9ng l\u01b0u v\u1ef1c s\u00f4ng Amazon thu\u1ed9c Braxin, l\u00e0 lo\u1ea1i c\u00e2y nhi\u1ec7t \u0111\u1edbi t\u00ednh ch\u1ecbu r\u00e2m, th\u00edch nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 \u1ed5n \u0111\u1ecbnh, l\u01b0\u1ee3ng m\u01b0a l\u1edbn m\u00e0 \u0111\u1ec1u, kh\u00ed h\u1eadu c\u00f3 gi\u00f3 nh\u1eb9 v\u00e0 \u0111\u1ea5t \u0111ai m\u00e0u m\u1ee1, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 th\u1ea5p r\u1ea5t y\u1ebfu. Nhi\u1ec7t \u0111\u1ed9 b\u00ecnh qu\u00e2n 18oC l\u00e0 kh\u00f4ng th\u1ec3 sinh tr\u01b0\u1edfng b\u00ecnh th\u01b0\u1eddng, th\u1ea5p h\u01a1n 10oC th\u00ec c\u00e1c ho\u1ea1t \u0111\u1ed9ng sinh l\u00ed b\u00ean trong b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t, nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n 5oC l\u00e0 th\u01b0\u1eddng x\u1ea3y ra nhi\u1ec5m l\u1ea1nh, khi b\u1ecb nh\u1eb9 th\u00ec m\u1ed9t b\u1ed9 ph\u1eadn c\u00e2y s\u1ebd kh\u00f4 ho\u1eb7c n\u1ee9t v\u1ecf ch\u1ea3y nh\u1ef1a, khi nghi\u00eam tr\u1ecdng th\u00ec th\u00e2n c\u00e2y t\u1eeb ng\u1ecdn th\u00e2n \u0111\u1ebfn ph\u1ea7n g\u1ed1c to\u00e0n b\u1ed9 ch\u1ebft kh\u00f4. Nhi\u1ec7t \u0111\u1ed9 m\u00f9a \u0111\u00f4ng v\u00f9ng l\u01b0u v\u1ef1c s\u00f4ng Tr\u01b0\u1eddng Giang v\u00e0 v\u1ec1 ph\u00eda B\u1eafc s\u00f4ng Tr\u01b0\u1eddng Giang c\u1ee7a Trung Qu\u1ed1c th\u01b0\u1eddng d\u01b0\u1edbi 0oC, v\u00ec v\u1eady ph\u00eda B\u1eafc Trung Qu\u1ed1c kh\u00f4ng th\u1ec3 tr\u1ed3ng \u0111\u01b0\u1ee3c c\u00e2y cao su ba l\u00e1. Hi\u1ec7n nay c\u00e2y cao su \u1edf Trung Qu\u1ed1c ch\u1ee7 y\u1ebfu ph\u00e2n b\u1ed1 \u1edf Qu\u1ea3ng \u0110\u00f4ng, Qu\u1ea3ng T\u00e2y, V\u00e2n Nam, Ph\u00fac Ki\u1ebfn, H\u1ea3i Nam v\u00e0 6 t\u1ec9nh thu\u1ed9c 22 v\u0129 \u0111\u1ed9 B\u1eafc v\u1ec1 ph\u00eda Nam c\u1ee7a \u0110\u00e0i Loan.<\/p>\n","protected":false},"excerpt":{"rendered":"
Trong cu\u1ed9c s\u1ed1ng c\u1ee7a ch\u00fang ta, h\u1ea7u nh\u01b0 h\u00e0ng ng\u00e0y \u0111\u1ec1u g\u1eb7p g\u1ee1 v\u1edbi cao su, v\u00ed d\u1ee5 ra kh\u1ecfi nh\u00e0 \u0111i xe \u0111\u1ea1p, \u0111\u00e1p \u00f4 t\u00f4 bu\u00fdt v\u00e0 c\u1ea3 l\u00e1i m\u00e1y k\u00e9o\u2026 l\u1ed1p c\u1ee7a nh\u1eefng chi\u1ebfc xe n\u00e0y \u0111\u1ec1u \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb cao su. B\u00f3ng r\u1ed5, b\u00f3ng chuy\u1ec1n ho\u1eb7c b\u00f3ng \u0111\u00e1 trong ho\u1ea1t […]<\/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-9708","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\/9708","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=9708"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9708\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}