Ch\u1eadp t\u1ed1i m\u00f9a h\u00e8, nh\u1eefng \u0111\u00e1m m\u00e2y l\u1eeda th\u01b0\u1eddng b\u1ecb m\u1eb7t \u0111\u1ea5t n\u00f3ng b\u1ecfng sau bu\u1ed5i tr\u01b0a hun n\u00f3ng, c\u1ed9ng th\u00eam t\u00e1c d\u1ee5ng h\u01a1i n\u01b0\u1edbc ng\u01b0ng k\u1ebft t\u1ecfa nhi\u1ec7t m\u00e0 ph\u00e1t tri\u1ec3n th\u00e0nh nh\u1eefng \u0111\u1ee5n m\u00e2y m\u1ecdng n\u01b0\u1edbc. C\u00e1c \u0111\u1ee5n m\u00e2y n\u00e0y gi\u1ed1ng nh\u01b0 r\u1ec5 c\u00e2y \u0111\u1ea1i th\u1ee5 ph\u00ecnh u kh\u1eafp n\u01a1i, mu\u00f4n h\u00ecnh v\u1ea1n tr\u1ea1ng. \u1ede nh\u1eefng ch\u1ed7 \u00e1nh n\u1eafng chi\u1ec1u chi\u1ebfu v\u00e0o m\u00e2y c\u00f3 m\u00e0u \u0111\u1ecf s\u1eabm, nh\u1eefng ch\u1ed7 khu\u1ea5t \u00e1nh n\u1eafng th\u00ec m\u00e0u s\u1eafc \u0111en x\u00ec. T r\u00ean bi\u00ean c\u00e1c \u0111\u00e1m m\u00e2y c\u00f3 \u0111\u01b0\u1eddng m\u01b0a n\u1ed1i ti\u1ebfp v\u1edbi ch\u00e2n tr\u1eddi. T r\u00ean \u0111\u1ec9nh \u0111\u00e1m m\u00e2y m\u00e0u v\u00e0ng \u0111\u1ecf, v\u01b0\u01a1n cao l\u00ean \u0111\u1ec9nh b\u1ea7u tr\u1eddi. T rong m\u00e2y c\u00f3 \u00e1nh ch\u1edbp xuy\u00ean qua \u0111\u00e1y gi\u1ed1ng nh\u01b0 con r\u1eafn b\u1ea1c, ho\u1eb7c c\u00e0nh c\u00e2y kh\u00f4 \u0111\u1ea3o ng\u01b0\u1ee3c, l\u00fac l\u00f3e l\u00ean, l\u00fac t\u1eaft ng\u00f3m. Khi c\u00f3 s\u00e9t (ch\u1edbp2 ), ch\u1ed7 m\u00e2y m\u00e0u \u0111en b\u1ed7ng \u0111\u1ecf b\u1eebng l\u00ean, gi\u1ed1ng nh\u01b0 thanh th\u00e9p v\u1eeba l\u1ea5y trong l\u00f2 ra.<\/p>\n\n\n\n
V\u00ec sao ch\u1edbp (s\u00e9t) l\u1ea1i c\u00f3 h\u00ecnh d\u1ea1ng nh\u01b0 c\u00e0nh c\u00e2y kh\u00f4 \u0111\u1ea3o ng\u01b0\u1ee3c?<\/p>\n\n\n\n
Khi c\u00f3 m\u00e2y gi\u00f4ng xu\u1ea5t hi\u1ec7n, ph\u1ea7n d\u01b0\u1edbi \u0111\u00e1m m\u00e2y c\u00f3 t\u00edch \u0111i\u1ec7n \u00e2m, m\u1eb7t \u0111\u1ea5t c\u1ea3m \u1ee9ng c\u00f3 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng.<\/p>\n\n\n\n
\u00c1nh ch\u1edbp tr\u01b0\u1edbc h\u1ebft l\u00e0 do \u0111i\u1ec7n t\u00edch \u00e2m t\u1eeb \u0111\u00e1y \u0111\u00e1m m\u00e2y \u0111\u00e1nh xu\u1ed1ng m\u1eb7t \u0111\u1ea5t. Qu\u00e1 tr\u00ecnh \u0111\u00f3 g\u1ecdi l\u00e0 \u201cch\u1edbp d\u1eabn \u0111\u01b0\u1eddng\u201d, n\u00f3 c\u00f3 t\u00e1c d\u1ee5ng m\u1edf \u0111\u01b0\u1eddng. Ch\u1edbp m\u1edf \u0111\u01b0\u1eddng kh\u00f4ng ph\u1ea3i khi n\u00e0o c\u0169ng thu\u1eadn bu\u1ed3m xu\u00f4i gi\u00f3. T r\u01b0\u1edbc h\u1ebft n\u00f3 h\u01b0\u1edbng \u0111\u1ebfn nh\u1eefng ch\u1ed7 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng ph\u00e2n b\u1ed1 h\u1ed7n t\u1ea1p d\u01b0\u1edbi \u0111\u00e1y \u0111\u00e1m m\u00e2y. Nh\u1eefng \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng n\u00e0y l\u00e0 do m\u1eb7t \u0111\u1ea5t c\u1ea3m \u1ee9ng h\u00ecnh th\u00e0nh \u1edf \u0111\u1ec9nh nh\u1ecdn c\u1ee7a nh\u1eefng v\u1eadt th\u1ec3, v\u00ec ch\u00fang b\u00e0i tr\u1eeb l\u1eabn nhau m\u00e0 khu\u1ebfch t\u00e1n v\u00e0o trong kh\u00f4ng kh\u00ed, \u0111\u01b0\u1ee3c s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng h\u1ed7n lo\u1ea1n c\u1ee7a l\u1edbp kh\u00f4ng kh\u00ed d\u01b0\u1edbi \u0111\u00e1y \u0111\u00e1m m\u00e2y mang theo n\u00ean s\u1ef1 ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u. S\u00e9t d\u1eabn \u0111\u01b0\u1eddng th\u01b0\u1eddng h\u01b0\u1edbng v\u00e0o khu v\u1ef1c c\u00f3 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng t\u1eadp trung. N\u1ebfu g\u1ea7n \u0111\u00f3 c\u00f3 nhi\u1ec1u khu v\u1ef1c t\u1eadp trung \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng th\u00ec s\u00e9t d\u1eabn \u0111\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n ph\u00e2n nh\u00e1nh. N\u00f3i chung s\u00e9t th\u01b0\u1eddng ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u01a1i kh\u00f4ng kh\u00ed \u1ea9m \u01b0\u1edbt, \u00edt khi \u0111\u00e1nh v\u00e0o ch\u1ed7 kh\u00f4 r\u00e1o. V\u00ec ch\u00fang tr\u00e1nh ch\u1ed7 kh\u00f4 t\u00ecm \u0111\u1ebfn ch\u1ed7 \u01b0\u1edbt, n\u00ean \u0111\u01b0\u1eddng s\u00e9t \u0111i quanh co, kh\u00fac khu\u1ef7u \u0111\u1ec3 \u0111i s\u00e2u xu\u1ed1ng nh\u1eefng ch\u1ed7 c\u00f3 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng \u1ea9m \u01b0\u1edbt h\u01a1n. \u1ede m\u1ed9t s\u1ed1 ch\u1ed7 n\u00e0o \u0111\u00f3 n\u00f3 l\u1ea1i ti\u1ebfp t\u1ee5c ph\u00e2n nh\u00e1nh \u0111\u1ec3 ph\u00e1t tri\u1ec3n. N\u00f3 v\u01b0\u01a1n \u0111\u1ebfn \u0111\u00e2u mang \u0111i\u1ec7n t\u00edch \u00e2m \u0111\u1ebfn \u0111\u00f3. Ch\u00ednh v\u00ec v\u1eady h\u00ecnh d\u1ea1ng c\u1ee7a tia ch\u1edbp c\u00f3 d\u1ea1ng c\u00e0nh kh\u00f4 \u0111\u1ea3o ng\u01b0\u1ee3c. Nh\u01b0ng tr\u00ean \u0111\u01b0\u1eddng \u0111i c\u1ee7a s\u00e9t \u00e1nh s\u00e1ng ch\u01b0a m\u1ea1nh. \u0110\u1ec9nh \u0111\u1ea7u c\u1ee7a s\u00e9t v\u01b0\u01a1n d\u1ea7n t\u1edbi ph\u00eda d\u01b0\u1edbi, khi g\u1ea7n m\u1eb7t \u0111\u1ea5t n\u00f3 g\u1eb7p \u0111\u01b0\u1ee3c \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng tr\u00ean c\u00e1c v\u1eadt nh\u1ecdn, \u0111\u01b0\u1ee3c c\u00e1c \u0111i\u1ec7n t\u00edch \u00e2m c\u1ee7a s\u00e9t d\u1eabn \u0111\u01b0\u1eddng thu h\u00fat, \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng v\u00e0 \u0111i\u1ec7n t\u00edch \u00e2m trung h\u00f2a v\u1edbi nhau, l\u00fac \u0111\u00f3 \u00e1nh s\u00e1ng ph\u00e1t ra m\u1edbi m\u1ea1nh. V\u00ec c\u00e1c \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t \u0111i l\u00ean theo \u0111\u01b0\u1eddng c\u0169 c\u1ee7a s\u00e9t d\u1eabn \u0111\u01b0\u1eddng cho n\u00ean \u00e1nh s\u00e1ng c\u1ee7a tia ch\u1edbp c\u0169ng c\u00f3 h\u00ecnh c\u00e0nh c\u00e2y kh\u00f4 \u0111\u1ea3o ng\u01b0\u1ee3c. Lo\u1ea1i s\u00e9t n\u00e0y g\u1ecdi l\u00e0 s\u00e9t ph\u1ea3n h\u1ed3i.<\/p>\n\n\n\n
Khi s\u00e9t d\u1eabn \u0111\u01b0\u1eddng \u0111\u00e1nh xu\u1ed1ng m\u1eb7t \u0111\u1ea5t n\u00f3 th\u01b0\u1eddng bi\u1ebfn th\u00e0nh s\u00e9t c\u1ea7u (hay s\u00e9t h\u00f2n). \u0110\u00f3 l\u00e0 nh\u1eefng kh\u00ed th\u1ec3 h\u00ecnh c\u1ea7u mang \u0111i\u1ec7n v\u1edbi \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 10 -20 cm. Nh\u1eefng h\u00ecnh c\u1ea7u n\u00e0y r\u1ea5t nh\u1eb9, n\u00f3 c\u00f3 th\u1ec3 bay theo gi\u00f3, c\u00f3 th\u1ec3 bi\u1ebfn h\u00ecnh chui v\u00e0o khe c\u1eeda, sau \u0111\u00f3 l\u1ea1i kh\u00f4i ph\u1ee5c th\u00e0nh h\u00ecnh c\u1ea7u. N\u00f3 th\u01b0\u1eddng \u0111i men theo d\u00e2y \u0111i\u1ec7n, \u1ed1ng n\u01b0\u1edbc, lu\u1ed3ng kh\u00f4ng kh\u00ed n\u00f3ng, khi n\u00f3 chuy\u1ec3n \u0111\u1ed9ng th\u01b0\u1eddng ph\u00e1t ra ti\u1ebfng v\u00f9 v\u00f9. N\u00f3 c\u00f3 th\u1ec3 l\u00e0 m\u00e0u \u0111\u1ecf, ho\u1eb7c m\u00e0u v\u00e0ng nh\u01b0 qu\u1ea3 qu\u1ea5t, c\u0169ng c\u00f3 th\u1ec3 l\u00e0 m\u00e0u xanh lam ho\u1eb7c \u0111\u1ecf nh\u1ea1t. \u1ede ph\u00eda b\u1eafc t\u1ec9nh Giang T\u00f4 c\u00f3 m\u1ed9t n\u0103m ng\u01b0\u1eddi ta t\u1eebng nh\u00ecn th\u1ea5y s\u00e9t l\u00e0 m\u1ed9t \u0111\u00e1m s\u00e9t c\u1ea7u b\u00e1m theo sau m\u1ed9t con th\u1ecf \u0111ang ch\u1ea1y r\u1ed3i chui v\u00e0o b\u00e3i c\u1ecf. Sau \u0111\u00f3 ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n cu\u1ed1i v\u1ea1t c\u1ecf b\u1ecb ch\u00e1y c\u00f3 m\u1ed9t con th\u1ecf ch\u1ebft. \u1ede D\u01b0\u01a1ng Kinh \u0110\u00f4ng ph\u1ed1, T h\u01b0\u1ee3ng H\u1ea3i trong m\u1ed9t l\u1ea7n s\u00e9t \u0111\u00e1nh ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n th\u1ea5y m\u1ed9t qu\u1ea3 c\u1ea7u l\u1eeda t\u1eeb m\u1ed9t c\u1eeda s\u1ed5 \u1edf ph\u00eda b\u1eafc chui v\u00e0o c\u0103n ph\u00f2ng t\u1ea7ng hai ch\u1ea1y m\u1ed9t v\u00f2ng quanh t\u01b0\u1eddng r\u1ed3i l\u1ea1i v\u01b0\u1ee3t ra c\u1eeda s\u1ed5 \u0111\u00f3, \u0111\u1ed3ng th\u1eddi ph\u00e1t ra m\u1ed9t ti\u1ebfng n\u1ed5 l\u1edbn, sau \u0111\u00f3 m\u1ea5t t\u00edch. V\u1ec1 sau ng\u01b0\u1eddi ta nh\u00ecn th\u1ea5y \u1edf ch\u00e2n t\u01b0\u1eddng g\u00f3c b\u00ean tr\u00e1i c\u1eeda s\u1ed5 th\u1ee7ng m\u1ed9t \u1ed5 g\u00e0 s\u00e2u 20 cm. \u0110\u00f3 ch\u00ednh l\u00e0 do s\u00e9t \u0111\u00e1nh g\u00e2y n\u00ean.<\/p>\n\n\n\n
Nguy\u00ean nh\u00e2n h\u00ecnh th\u00e0nh s\u00e9t c\u1ea7u cho \u0111\u1ebfn nay v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c l\u00e0m s\u00e1ng t\u1ecf, c\u00f3 r\u1ea5t nhi\u1ec1u gi\u1ea3 thuy\u1ebft. V\u00ed d\u1ee5 c\u00f3 ng\u01b0\u1eddi cho r\u1eb1ng n\u00f3 xu\u1ea5t hi\u1ec7n \u1edf ch\u1ed7 \u0111\u01b0\u1eddng g\u1ea5p kh\u00fac c\u1ee7a s\u00e9t d\u1eabn \u0111\u01b0\u1eddng, c\u00f3 ng\u01b0\u1eddi l\u1ea1i cho r\u1eb1ng n\u00f3 xu\u1ea5t hi\u1ec7n \u1edf ch\u1ed7 s\u00e9t \u0111\u00e1nh. S\u1ef1 h\u00ecnh th\u00e0nh n\u00f3 c\u00f3 li\u00ean quan v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao h\u00e0ng v\u1ea1n \u0111\u1ed9 c\u1ee7a s\u00e9t. N\u00f3 c\u00f3 th\u1ec3 c\u00f3 chuy\u1ec3n \u0111\u1ed9ng xo\u00e1y, th\u00e0nh ph\u1ea7n n\u00f3 bao g\u1ed3m \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng v\u00e0 c\u00e1c ion kh\u00f4ng kh\u00ed. C\u0169ng c\u00f3 ng\u01b0\u1eddi \u0111\u00e3 t\u1eebng th\u1eed nghi\u1ec7m t\u1ea1o ra s\u00e9t h\u00ecnh nh\u00e2n t\u1ea1o. Do \u0111\u00f3 \u0111\u1ed1i v\u1edbi v\u1ea5n \u0111\u1ec1 n\u00e0y c\u00f2n ph\u1ea3i ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u v\u00e0 kh\u00e1m ph\u00e1 th\u00eam.<\/p>\n\n\n\n
T \u1eeb kho\u00e1: S\u00e9t d\u1eabn \u0111\u01b0\u1eddng; S\u00e9t h\u00ecnh c\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"
Ch\u1eadp t\u1ed1i m\u00f9a h\u00e8, nh\u1eefng \u0111\u00e1m m\u00e2y l\u1eeda th\u01b0\u1eddng b\u1ecb m\u1eb7t \u0111\u1ea5t n\u00f3ng b\u1ecfng sau bu\u1ed5i tr\u01b0a hun n\u00f3ng, c\u1ed9ng th\u00eam t\u00e1c d\u1ee5ng h\u01a1i n\u01b0\u1edbc ng\u01b0ng k\u1ebft t\u1ecfa nhi\u1ec7t m\u00e0 ph\u00e1t tri\u1ec3n th\u00e0nh nh\u1eefng \u0111\u1ee5n m\u00e2y m\u1ecdng n\u01b0\u1edbc. C\u00e1c \u0111\u1ee5n m\u00e2y n\u00e0y gi\u1ed1ng nh\u01b0 r\u1ec5 c\u00e2y \u0111\u1ea1i th\u1ee5 ph\u00ecnh u kh\u1eafp n\u01a1i, mu\u00f4n h\u00ecnh v\u1ea1n […]<\/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-9921","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\/9921","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=9921"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9921\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}