Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi\u00a0in nghi\u00eang<\/i><\/h2>\n

Trang 44 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>V\u00ec sao \u0111\u1ecba h\u00ecnh \u0111\u1ed3i n\u00fai n\u01b0\u1edbc ta b\u1ecb x\u00e2m th\u1ef1c m\u1ea1nh?<\/i><\/span><\/p>\n

Tr\u1ea3 l\u1eddi:<\/b><\/p>\n

Do t\u00e1c \u0111\u1ed9ng c\u1ee7a kh\u00ed h\u1eadu.<\/p>\n

Kh\u00ed h\u1eadu (bao g\u1ed3m c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9, bi\u00ean \u0111\u1ed9 nhi\u1ec7t, gi\u00f3, m\u01b0a \u1ea9m, s\u1ef1 ph\u00e2n ho\u00e1 m\u00f9a m\u01b0a, m\u00f9a kh\u00f4) tham gia v\u00e0o c\u00e1c qu\u00e1 tr\u00ecnh c\u01a1 h\u1ecdc, v\u1eadt l\u00ed, th\u1ec3 hi\u1ec7n \u1edf qu\u00e1 tr\u00ecnh x\u00e2m th\u1ef1c di\u1ec5n ra m\u1ea1nh m\u1ebd. (Bi\u1ec3u hi\u1ec7n: b\u1ec1 m\u1eb7t \u0111\u1ecba h\u00ecnh b\u1ecb c\u1eaft x\u1ebb, h\u1ebbm v\u1ef1c, khe s\u00e2u…).<\/p>\n

Trang 44 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>H\u00e3y n\u00eau \u1ea3nh h\u01b0\u1edfng t\u00edch c\u1ef1c v\u00e0 ti\u00eau c\u1ef1c c\u1ee7a \u0111\u1ecba h\u00ecnh x\u00e2m th\u1ef1c b\u1ed3i t\u1ee5 m\u1ea1nh \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u1ea5t \u1edf n\u01b0\u1edbc ta.<\/i><\/span><\/p>\n

Tr\u1ea3 l\u1eddi:<\/b><\/p>\n

– T\u00edch c\u1ef1c: m\u1edf mang \u0111\u1ed3ng b\u1eb1ng h\u1ea1 l\u01b0u s\u00f4ng.<\/p>\n

– Ti\u00eau c\u1ef1c: \u0111\u1ea5t b\u1ecb b\u00e0o m\u00f2n r\u1eeda tr\u00f4i, nhi\u1ec1u n\u01a1i ch\u1ec9 c\u00f2n tr\u01a1 s\u1ecfi \u0111\u00e1.<\/p>\n

Trang 46 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>V\u00ec sao s\u00f4ng ng\u00f2i n\u01b0\u1edbc ta c\u00f3 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m: m\u1ea1ng l\u01b0\u1edbi d\u00e0y \u0111\u1eb7c; nhi\u1ec1u n\u01b0\u1edbc, gi\u00e0u ph\u00f9 sa; ch\u1ebf \u0111\u1ed9 n\u01b0\u1edbc theo m\u00f9a?<\/i><\/span><\/p>\n

Tr\u1ea3 l\u1eddi:<\/b><\/p>\n

– Do t\u00e1c \u0111\u1ed9ng c\u1ee7a kh\u00ed h\u1eadu m\u01b0a nhi\u1ec1u tr\u00ean \u0111\u1ecba h\u00ecnh \u0111\u1ed3i n\u00fai chi\u1ebfm ph\u1ea7n l\u1edbn di\u1ec7n t\u00edch v\u00e0 b\u1ecb c\u1eaft x\u1ebb m\u1ea1nh, s\u01b0\u1eddn d\u1ed1c l\u1edbn n\u00ean m\u1ea1ng l\u01b0\u1edbi s\u00f4ng ng\u00f2i d\u00e0y \u0111\u1eb7c, nhi\u1ec1u n\u01b0\u1edbc, gi\u00e0u ph\u00f9 sa.<\/p>\n

– Do m\u01b0a theo m\u00f9a n\u00ean s\u00f4ng ng\u00f2i c\u00f3 ch\u1ebf \u0111\u1ed9 n\u01b0\u1edbc theo m\u00f9a.<\/p>\n

Trang 46 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>\u0110\u1ea5t feralit c\u00f3 \u0111\u1eb7c t\u00ednh g\u00ec v\u00e0 \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u1ea5t trong tr\u1ed3ng tr\u1ecdt?<\/i><\/span><\/p>\n

Tr\u1ea3 l\u1eddi:<\/b><\/p>\n

\u2022 \u0110\u1eb7c t\u00ednh c\u1ee7a \u0111\u1ea5t feralit:<\/p>\n

+ \u0110\u1ea5t chua, ngh\u00e8o m\u00f9n, nhi\u1ec1u s\u00e9t.<\/p>\n

+ \u0110\u1ea5t c\u00f3 m\u00e0u \u0111\u1ecf v\u00e0ng do c\u00f3 nhi\u1ec1u h\u1ee3p ch\u1ea5t s\u1eaft, nh\u00f4m. C\u00e1c h\u1ee3p ch\u1ea5t n\u1ea7y th\u01b0\u1eddng t\u00edch t\u1ee5 th\u00e0nh k\u1ebft von ho\u1eb7c \u0111\u00e1 ong n\u1eb1m c\u00e1ch m\u1eb7t \u0111\u1ea5t kh\u00e1 s\u00e2u (0,5-1m). Khi \u0111\u00e1 ong b\u1ecb m\u1ea5t l\u1edbp che ph\u1ee7 v\u00e0 l\u1ed9 ra ngo\u00e0i s\u1ebd kh\u00f4 c\u1ee9ng l\u1ea1i.<\/p>\n

\u2022 S\u1ef1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ea5t feralit \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u1ea5t trong tr\u1ed3ng tr\u1ecdt:<\/p>\n

+ Kh\u00f4ng th\u00edch h\u1ee3p cho ph\u00e1t tri\u1ec3n c\u00e2y l\u01b0\u01a1ng th\u1ef1c, ch\u1ec9 th\u00edch h\u1ee3p cho vi\u1ec7c ph\u00e1t tri\u1ec3n m\u1ed9t s\u1ed1 lo\u1ea1i c\u00e2y c\u00f4ng nghi\u1ec7p, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e2y c\u00f4ng nghi\u1ec7p l\u00e2u n\u0103m v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i c\u00e2y \u0103n qu\u1ea3, b\u00ean c\u1ea1nh \u0111\u00f3 c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n \u0111\u1ed3ng c\u1ecf \u0111\u1ec3 ch\u0103n nu\u00f4i v\u00e0 tr\u1ed3ng r\u1eebng.<\/p>\n

+ Do \u0111\u1ea5t feralit chua v\u00e0 ngh\u00e8o ch\u1ea5t dinh d\u01b0\u1ee1ng n\u00ean trong qu\u00e1 tr\u00ecnh tr\u1ed3ng tr\u1ecdt ph\u1ea3i lu\u00f4n ch\u00fa \u00fd c\u1ea3i t\u1ea1o \u0111\u1ea5t.<\/p>\n

+ Ph\u1ea7n l\u1edbn \u0111\u1ea5t feralit ph\u00e2n b\u1ed1 \u1edf \u0111\u1ecba h\u00ecnh cao n\u00ean r\u1ea5t d\u1ec5 b\u1ecb x\u00f3i m\u00f2n, v\u00ec v\u1eady trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ea7n c\u00f3 bi\u1ec7n ph\u00e1p th\u00edch h\u1ee3p \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1ea5t.<\/p>\n

\n

\n

C\u00e2u 1: H\u00e3y n\u00eau bi\u1ec3u hi\u1ec7n c\u1ee7a thi\u00ean nhi\u00ean nhi\u1ec7t \u0111\u1edbi \u1ea9m gi\u00f3 m\u00f9a qua c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ecba h\u00ecnh, s\u00f4ng ng\u00f2i \u1edf n\u01b0\u1edbc ta.<\/b><\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

– \u0110\u1ecba h\u00ecnh: qu\u00e1 tr\u00ecnh x\u00e2m th\u1ef1c – b\u1ed3i t\u1ee5 l\u00e0 qu\u00e1 tr\u00ecnh ch\u00ednh trong s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 bi\u1ebfn \u0111\u1ed5i \u0111\u1ecba h\u00ecnh Vi\u1ec7t Nam hi\u1ec7n t\u1ea1i. Do ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u1ec1n nhi\u1ec7t \u0111\u1ed9 cao, l\u01b0\u1ee3ng m\u01b0a l\u1edbn v\u1edbi hai m\u00f9a kh\u00f4, \u1ea9m n\u00ean qu\u00e1 tr\u00ecnh x\u00e2m th\u1ef1c, r\u1eeda tr\u00f4i \u1edf mi\u1ec3n n\u00fai v\u00e0 b\u1ed3i t\u1ee5 nhanh \u1edf \u0111\u1ed3ng b\u1eb1ng h\u1ea1 l\u01b0u di\u1ec5n ra m\u1ea1nh.<\/p>\n

– S\u00f4ng ng\u00f2i: m\u1ea1ng l\u01b0\u1edbi d\u00e0y \u0111\u1eb7c; nhi\u1ec1u n\u01b0\u1edbc, gi\u00e0u ph\u00f9 sa; ch\u1ebf \u0111\u1ed9 n\u01b0\u1edbc theo m\u00f9a.<\/p>\n

C\u00e2u 2: Thi\u00ean nhi\u00ean nhi\u1ec7t \u0111\u1edbi \u0103m gi\u00f3 m\u00f9a bi\u1ec3u hi\u1ec7n qua c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ea5t, sinh v\u1eadt v\u00e0 c\u1ea3nh quan thi\u00ean nhi\u00ean nh\u01b0 th\u1ebf n\u00e0o?<\/b><\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

\u2022 \u0110\u1ea5t<\/p>\n

– Qu\u00e1 tr\u00ecnh feralit l\u00e0 qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh \u0111\u1ea5t \u0111\u1eb7c tr\u01b0ng cho v\u00f9ng kh\u00ed h\u1eadu nhi\u1ec7t \u0111\u1edbi \u1ea9m. Trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1edbi \u1ea9m cao, qu\u00e1 tr\u00ecnh phong h\u00f3a di\u1ec5n ra v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 m\u1ea1nh, t\u1ea1o n\u00ean m\u1ed9t l\u1edbp \u0111\u1ea5t d\u00e0y. M\u01b0a nhi\u1ec1u r\u1eeda tr\u00f4i c\u00e1c ch\u1ea5t bad\u01a1 d\u1ec5 tan (Ca^{2+<\/sup>, Mg2+<\/sup>, K+<\/sup>) l\u00e0m \u0111\u1ea5t chua, \u0111\u1ed3ng th\u1eddi c\u00f3 s\u1ef1 t\u00edch t\u1ee5 oxit s\u1eaft (Fe_{2<\/sub>O3<\/sub>) v\u00e0 oxit nh\u00f4m (Al2<\/sub>O3<\/sub>) t\u1ea1o ra m\u00e0u \u0111\u1ecf v\u00e0ng.<\/p>\n}}

– \u0110\u1ea5t feralit l\u00e0 lo\u1ea1i \u0111\u1ea5t ch\u00ednh \u1edf v\u00f9ng \u0111\u1ed3i n\u00fai n\u01b0\u1edbc ta.<\/p>\n

\u2022 Sinh v\u1eadt<\/p>\n

– H\u1ec7 sinh th\u00e1i r\u1eebng nguy\u00ean sinh \u0111\u1eb7c tr\u01b0ng cho kh\u00ed h\u1eadu n\u00f3ng \u1ea9m l\u00e0 r\u1eebng r\u1eadm nhi\u1ec7t \u0111\u1edbi l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh. Hi\u1ec7n nay, r\u1eebng nguy\u00ean sinh c\u00f2n l\u1ea1i r\u1ea5t \u00edt, ph\u1ed5 bi\u1ebfn l\u00e0 r\u1eebng th\u1ee9 sinh v\u1edbi c\u00e1c h\u1ec7 sinh th\u00e1i r\u1eebng nhi\u1ec7t \u0111\u1edbi gi\u00f3 m\u00f9a bi\u1ebfn d\u1ea1ng kh\u00e1c nhau, t\u1eeb r\u1eebng gi\u00f3 m\u00f9a th\u01b0\u1eddng xanh, r\u1eebng gi\u00f3 m\u00f9a n\u1eeda r\u1ee5ng l\u00e1, r\u1eebng th\u01b0 kh\u00f4 r\u1ee5ng l\u00e1 t\u1edbi xa van, b\u1ee5i gai nhi\u1ec7t \u0111\u1edbi.<\/p>\n

– Trong gi\u1edbi sinh v\u1eadt, th\u00e0nh ph\u1ea7n c\u00e1c lo\u1ea1i nhi\u1ec7t \u0111\u1edbi chi\u1ebfm \u01b0u th\u1ebf.<\/p>\n

+ Th\u1ef1c v\u1eadt ph\u1ed5 bi\u1ebfn l\u00e0 c\u00e1c lo\u00e0i thu\u1ed9c c\u00e1c h\u1ecd c\u00e2y nhi\u1ec7t \u0111\u1edbi nh\u01b0 h\u1ecd \u0110\u1eadu, Vang, D\u00e2u t\u1eb1m.<\/p>\n

+ \u0110\u1ed9ng v\u1eadt trong r\u1eebng l\u00e0 c\u00e1c chim th\u00fa nhi\u1ec7t \u0111\u1edbi, nhi\u1ec1u nh\u1ea5t l\u00e0 c\u00f4ng, tri, g\u00e0 l\u00f4i, v\u1eb9t, kh\u1ec9, v\u01b0\u1ee3n, nai, ho\u1eb5ng\u2026Ngo\u00e0i ra, c\u00e1c lo\u00e0i b\u00f2 s\u00e1t, \u1ebfch nh\u00e1i, c\u00f4n tr\u00f9ng c\u0169ng r\u1ea5t phong ph\u00fa.<\/p>\n

– H\u1ec7 sinh th\u00e1i r\u1eebng nhi\u1ec7t \u0111\u1edbi \u1ea9m gi\u00f3 m\u00f9a ph\u00e1t tri\u1ec3n tr\u00ean \u0111\u1ea5t feralit l\u00e0 c\u1ea3nh quan ti\u00eau bi\u1ec3u cho thi\u00ean nhi\u00ean nhi\u1ec7t \u0111\u1edbi \u1ea9m gi\u00f3 m\u00f9a \u1edf n\u01b0\u1edbc ta.<\/p>\n

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C\u00e2u 3: H\u00e3y n\u00eau \u1ea3nh h\u01b0\u1edfng c\u1ee7a thi\u00ean nhi\u00ean nhi\u1ec7t \u0111\u1edbi \u1ea9m gi\u00f3 m\u00f9a \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t v\u00e0 \u0111\u1eddi s\u1ed1ng.<\/b><\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

– Thu\u1eadn l\u1ee3i: t\u1ea1o \u0111i\u1ec1u ki\u1ec7n ph\u00e1t tri\u1ec3n n\u1ec1n n\u00f4ng nghi\u1ec7p l\u00faa n\u01b0\u1edbc, \u0111a d\u1ea1ng ho\u00e1 c\u00e2y tr\u1ed3ng, v\u1eadt nu\u00f4i.<\/p>\n

– Kh\u00f3 kh\u0103n: h\u1ea1n h\u00e1n, l\u0169 l\u1ee5t, tai bi\u1ebfn kh\u00ed h\u1eadu, di\u1ec5n bi\u1ebfn kh\u00ed h\u1eadu th\u1ea5t th\u01b0\u1eddng (n\u0103m r\u00e9t s\u1edbm, n\u0103m r\u00e9t mu\u1ed9n, n\u0103m \u00fang ng\u1eadp, n\u0103m h\u1ea1n h\u00e1n,…)<\/p>\n

\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t kh\u00e1c v\u00e0 \u0111\u1eddi s\u1ed1ng.<\/p>\n

– C\u00e1c ho\u1ea1t \u0111\u1ed9ng giao th\u00f4ng v\u1eadn t\u1ea3i, du l\u1ecbch, c\u00f4ng nghi\u1ec7p khai th\u00e1c… ch\u1ecbu \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp c\u1ee7a s\u1ef1 ph\u00e2n m\u00f9a kh\u00ed h\u1eadu, m\u00f9a n\u01b0\u1edbc s\u00f4ng.<\/p>\n

– \u0110\u1ed9 \u1ea9m cao g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c b\u1ea3o qu\u1ea3n m\u00e1y m\u00f3c, thi\u1ebft b\u1ecb, n\u00f4ng s\u1ea3n.<\/p>\n

– C\u00e1c thi\u00ean tai nh\u01b0 b\u00e3o, l\u0169 l\u1ee5t, h\u1ea1n h\u00e1n h\u1eb1ng n\u0103m g\u00e2y t\u1ed5n th\u1ea5t r\u1ea5t l\u1edbn cho m\u1ecdi ng\u00e0nh s\u1ea3n xu\u1ea5t, g\u00e2y thi\u1ec7t h\u1ea1i v\u1ec1 ng\u01b0\u1eddi v\u00e0 t\u00e0i s\u1ea3n c\u1ee7a d\u00e2n c\u01b0.<\/p>\n

– C\u00e1c hi\u1ec7n t\u01b0\u1ee3ng th\u1eddi ti\u1ebft th\u1ea5t th\u01b0\u1eddng nh\u01b0 gi\u00f4ng l\u1ed1c, m\u01b0a \u0111\u00e1, s\u01b0\u01a1ng mu\u1ed1i, r\u00e9t h\u1ea1i kh\u00f4 n\u00f3ng… c\u0169ng g\u00e2y \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn s\u1ea3n xu\u1ea5t v\u00e0 \u0111\u1eddi s\u1ed1ng nh\u00e2n d\u00e2n.<\/p>\n

– M\u00f4i tr\u01b0\u1eddng thi\u00ean nhi\u00ean d\u1ec5 b\u1ecb suy tho\u00e1i, n\u1ebfu kh\u00f4ng s\u1eed d\u1ee5ng h\u1ee3p l\u00ed \u0111\u1ea5t d\u1ec5 b\u1ecb x\u00f3i m\u00f2n, r\u1eeda tr\u00f4i, l\u0169 l\u1ee5t, kh\u00f4 h\u1ea1n gia t\u0103ng.<\/p>\n

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<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi\u00a0in nghi\u00eang Trang 44 sgk \u0110\u1ecba L\u00ed 12:\u00a0V\u00ec sao \u0111\u1ecba h\u00ecnh \u0111\u1ed3i n\u00fai n\u01b0\u1edbc ta b\u1ecb x\u00e2m th\u1ef1c m\u1ea1nh? Tr\u1ea3 l\u1eddi: Do t\u00e1c \u0111\u1ed9ng c\u1ee7a kh\u00ed h\u1eadu. Kh\u00ed h\u1eadu (bao g\u1ed3m c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec7t \u0111\u1ed9, bi\u00ean \u0111\u1ed9 nhi\u1ec7t, gi\u00f3, m\u01b0a \u1ea9m, s\u1ef1 ph\u00e2n ho\u00e1 m\u00f9a m\u01b0a, m\u00f9a kh\u00f4) tham gia v\u00e0o […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1297],"tags":[1415,1414],"yoast_head":"\n