Trang 58 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>Nh\u1eadn x\u00e9t v\u1ec1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng qua giai \u0111o\u1ea1n 1943 – 1983 v\u00e0 1983 – 2006. Gi\u1ea3i th\u00edch v\u00ec sao c\u00f3 s\u1ef1 thay \u0111\u1ed5i \u0111\u00f3.<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – Giai \u0111o\u1ea1n 1943 – 1983: t\u1ed5ng di\u1ec7n t\u00edch c\u00f3 r\u1eebng, di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean, \u0111\u1ed9 che ph\u1ee7 r\u1eebng b\u1ecb gi\u1ea3m s\u00fat nghi\u00eam tr\u1ecdng (tr\u00ean du\u1edbi 50%). Nguy\u00ean nh\u00e2n: do chi\u1ebfn tranh, do ph\u00e1 r\u1eebng b\u1eeba b\u00e3i, do khai th\u00e1c kh\u00f4ng h\u1ee3p l\u00ed, c\u00f4ng t\u00e1c qu\u00e0n l\u00ed r\u1eebng c\u00f2n nhi\u1ec1u h\u1ea1n ch\u1ec3. M\u1eb7c d\u00f9 di\u1ec7n t\u00edch tr\u1ed3ng r\u1eebng \u0111\u1ea1t 0,4 tri\u1ec7u ha, nh\u01b0ng kh\u00f4ng b\u00f9 \u0111\u1eafp \u0111\u01b0\u1ee3c di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean b\u1ecb ph\u00e1, n\u00ean \u0111\u1ed9 che ph\u00f9 r\u1eebng gi\u1ea3m s\u00fat g\u1ea7n 50%.<\/p>\n – Giai \u0111o\u1ea1n 1983 – 2006: t\u1ed5ng di\u1ec7n t\u00edch c\u00f3 r\u1eebng, di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean, \u0111\u1ed9 che ph\u1ee7 r\u1eebng t\u0103ng \u0111\u00e1ng k\u1ec3, \u0111\u1eb7c bi\u1ec7t di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng t\u0103ng nhanh v\u00e0 \u0111\u1ea1t 2,5 tri\u1ec7u ha. Nguy\u00ean nh\u00e2n: c\u00f4ng t\u00e1c b\u1ea3o v\u1ec7, qu\u1ea3n l\u00ed, tr\u1ed3ng r\u1eebng \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng manh m\u1ebd. Tuy nhi\u00ean, di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean v\u1eabn \u00edt h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi n\u0103m 1943, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng v\u1eabn b\u1ecb gi\u1ea3m s\u00fat, m\u1eb7c d\u00f9 di\u1ec7n t\u00edch r\u1eebng \u0111ang d\u1ea7n t\u0103ng l\u00ean.<\/p>\n Trang 59 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>S\u1ef1 suy gi\u1ea3m \u0111a d\u1ea1ng sinh v\u1eadt c\u1ee7a n\u01b0\u1edbc ta bi\u1ec3u hi\u1ec7n \u1edf nh\u1eefng m\u1eb7t n\u00e0o?<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n S\u1ef1 suy gi\u1ea3m \u0111a d\u1ea1ng sinh v\u1eadt bi\u1ec3u hi\u1ec7n \u1edf ba m\u1eb7t: th\u00e0nh ph\u1ea7n lo\u00e0i, ngu\u1ed3n gen, ki\u1ec3u h\u1ec7 sinh th\u00e1i.<\/p>\n Trang 59 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>Nguy\u00ean nh\u00e2n n\u00e0o \u0111\u00e3 l\u00e0m suy gi\u1ea3m s\u1ed1 l\u01b0\u01a1ng lo\u00e0\u1ec9 \u0111\u1ed9ng, th\u1ef1c v\u1eadt t\u1ef1 nhi\u00ean?<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – T\u00e1c \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi (ph\u00e1 r\u1eebng b\u1eeba b\u00e3i, khai th\u00e1c kh\u00f4ng h\u1ee3p l\u00ed, \u0111\u1ed1t r\u1eebng l\u1ea5y di\u1ec7n t\u00edch canh t\u00e1c,…) \u0111\u00e3 l\u1ea7m suy gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i \u0111\u1ed9ng, th\u1ef1c v\u1eadt t\u1ef1 nhi\u00ean.<\/p>\n – Ngo\u00e0i ra, c\u00f2n do ch\u00e1y r\u1eebng b\u1edfi c\u00e1c thi\u00ean tai g\u00e2y ra.<\/p>\n Trang 60 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 th\u1ef1c hi\u1ec7n nh\u1eefng bi\u1ec7n ph\u00e1p g\u00ec \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111a d\u1ea1ng sinh v\u1eadt c\u1ee7a n\u01b0\u1edbc ta?<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n Ba bi\u1ec7n ph\u00e1p Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 l\u00e0m \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111a d\u1ea1ng sinh v\u1eadt c\u1ee7a n\u01b0\u1edbc ta:<\/p>\n – X\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng v\u01b0\u1eddn qu\u1ed1c gia v\u00e0 khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean: H\u1ec7 th\u1ed1ng v\u01b0\u1eddn qu\u1ed1c gia v\u00e0 khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean \u1edf n\u01b0\u1edbc ta ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng.<\/p>\n – Ban h\u00e0nh “S\u00e1ch \u0111\u1ecf Vi\u1ec7t Nam”. S\u1ed1 l\u01b0\u1ee3ng c\u00e1c lo\u00e0i chim, th\u00fa, c\u00e1, \u0111\u1ed9ng v\u1eadt kh\u00f4ng x\u01b0\u01a1ng s\u1ed1ng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh b\u1ea3o v\u1ec7. C\u00e1c lo\u00e0i th\u00fa, chim \u0111\u01b0\u1ee3c c\u00e1c t\u1ed5 ch\u1ee9c Qu\u1ed1c t\u1ebf h\u1ed7 tr\u1ee3 b\u1ea3o v\u1ec7.<\/p>\n – Quy \u0111\u1ecbnh khai th\u00e1c v\u1ec1 g\u1ed7, \u0111\u1ed9ng v\u1eadt v\u00e0 thu\u1ef7 s\u1ea3n.<\/p>\n Trang 60 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>H\u00e3y n\u00eau c\u00e1c bi\u1ec3u hi\u1ec7n suy tho\u00e1i t\u00e0i nguy\u00ean \u0111\u1ea5t \u1edf n\u01b0\u1edbc ta. N\u00eau c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 \u0111\u1ea5t \u0111\u1ed3i n\u00fai v\u00e0 c\u1ea3i t\u1ea1o \u0111\u1ea5t \u0111\u1ed3ng b\u1eb1ng.<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – Bi\u1ec3u hi\u1ec7n:<\/p>\n + \u1ede mi\u00ean n\u00fai: \u0111\u1ea5t b\u1ecb b\u1ea1c m\u00e0u, tr\u01a1 s\u1ecfi \u0111\u00e1,… do b\u1ecb x\u00f3i m\u00f2n, r\u1eeda tr\u00f4i, x\u00e2m th\u1ef1c.<\/p>\n + \u1ede \u0111\u1ed3ng b\u1eb1ng: \u0111\u1ea5t b\u1ecb nhi\u1ec5m m\u1eb7n, ph\u00e8n ho\u00e1; \u0111\u1ea5t b\u1ea1c m\u00e0u; \u0111\u1ea5t b\u1ecb \u00f4 nhi\u1ec5m.<\/p>\n – Bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 \u0111\u1ea5t \u1edf \u0111\u1ed3i n\u00fai v\u00e0 c\u1ea3i t\u1ea1o \u0111\u1ea5t \u0111\u1ed3ng b\u1eb1ng.<\/p>\n + \u0110\u1ed1i v\u1edbi v\u00f9ng \u0111\u1ed3i n\u00fai: \u0110\u1ec3 ch\u1ed1ng x\u00f3i m\u00f2n tr\u00ean \u0111\u1ea5t d\u1ed1c ph\u1ea3i \u00e1p d\u1ee5ng t\u1ed5ng th\u1ec3 c\u00e1c bi\u1ec7n ph\u00e1p thu\u1ef7 l\u1ee3i, canh t\u00e1c n\u00f4ng – l\u00e2m (l\u00e0m ru\u1ed9ng b\u1eadc thang, \u0111\u00e0o h\u1ed1 v\u1ea3y c\u00e1, tr\u1ed3ng c\u00e2y theo b\u0103ng). B\u1ea3o v\u1ec7 r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng, t\u1ed5 ch\u1ee9c \u0111\u1ecbnh canh, \u0111\u1ecbnh c\u01b0 cho d\u00e2n c\u01b0 mi\u1ec3n n\u00fai.<\/p>\n + \u0110\u1ed1i v\u1edbi \u0111\u1ed3ng b\u1eb1ng: \u0110\u1ed3ng th\u1eddi v\u1edbi th\u00e2m canh, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng \u0111\u1ea5t, c\u1ea7n canh t\u00e1c s\u1eed d\u1ee5ng \u0111\u1ea5t h\u1ee3p l\u00ed, ch\u1ed1ng b\u1ea1c m\u00e0u, gl\u00e2y, nhi\u1ec5m m\u1eb7n, nhi\u1ec5m ph\u00e8n. B\u00f3n ph\u00e2n c\u1ea3i t\u1ea1o \u0111\u1ea5t th\u00edch h\u1ee3p.<\/p>\n Trang 60 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>H\u00e3y n\u00eau c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 \u0111\u1ea5t \u1edf \u0111\u1ed3i n\u00fai v\u00e0 c\u1ea3i t\u1ea1o \u0111\u1ea5t \u0111\u1ed3ng b\u1eb1ng.<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – \u0110\u1ed1i v\u1edbi v\u00f9ng \u0111\u1ed3i n\u00fai: \u0110\u1ec3 ch\u1ed1ng x\u00f3i m\u00f2n tr\u00ean \u0111\u1ea5t d\u1ed1c ph\u1ea3i \u00e1p d\u1ee5ng t\u1ed5ng th\u1ec3 c\u00e1c bi\u1ec7n ph\u00e1p thu\u1ef7 l\u1ee3i, canh t\u00e1c n\u00f4ng – l\u00e2m (l\u00e0m ru\u1ed9ng b\u1eadc thang, \u0111\u00e0o h\u1ed1 v\u1ea3y c\u00e1, tr\u1ed3ng c\u00e2y theo b\u0103ng). B\u1ea3o v\u1ec7 r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng, t\u1ed5 ch\u1ee9c \u0111\u1ecbnh canh, \u0111\u1ecbnh c\u01b0 cho d\u00e2n c\u01b0 mi\u1ec3n n\u00fai.<\/p>\n – \u0110\u1ed1i v\u1edbi \u0111\u1ed3ng b\u1eb1ng: \u0110\u1ed3ng th\u1eddi v\u1edbi th\u00e2m canh, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng \u0111\u1ea5t, c\u1ea7n canh t\u00e1c s\u1eed d\u1ee5ng \u0111\u1ea5t h\u1ee3p l\u00ed, ch\u1ed1ng b\u1ea1c m\u00e0u, gl\u00e2y, nhi\u1ec5m m\u1eb7n, nhi\u1ec5m ph\u00e8n. B\u00f3n ph\u00e2n c\u1ea3i t\u1ea1o \u0111\u1ea5t th\u00edch h\u1ee3p.<\/p>\n Trang 61 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>H\u00e3y n\u00eau c\u00e1c bi\u1ec7n ph\u00e1p nh\u1eb1m \u0111\u1ea3m b\u1ea3o c\u00e2n b\u1eb1ng n\u01b0\u1edbc v\u00e0 ph\u00f2ng ch\u1ed1ng \u00f4 nhi\u1ec5m n\u01b0\u1edbc.<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – T\u0103ng \u0111\u1ed9 che ph\u1ee7, canh t\u00e1c \u0111\u00fang k\u0129 thu\u1eadt tr\u00ean \u0111\u1ea5t d\u1ed1c \u0111\u1ec3 gi\u1eef n\u01b0\u1edbc v\u00e0o m\u00f9a m\u01b0a, t\u0103ng l\u01b0\u1ee3ng n\u01b0\u1edbc th\u1ea5m v\u00e0o m\u00f9a kh\u00f4.<\/p>\n – X\u1eed l\u00ed h\u00e0nh ch\u00ednh \u0111\u1ed1i v\u1edbi c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t, d\u1ecbch v\u1ee5, d\u00e2n c\u01b0 kh\u00f4ng th\u1ee5c hi\u1ec7n \u0111\u00fang quy \u0111\u1ecbnh v\u1ec1 n\u01b0\u1edbc th\u1ea3i, nh\u1eb1m ng\u0103n ch\u1eb7n ngu\u1ed3n g\u00e2y \u00f4 nhi\u1ec5m n\u01b0\u1edbc.<\/p>\n – Tuy\u00ean truy\u1ec1n, gi\u00e1o d\u1ee5c cho ng\u01b0\u1eddi d\u00e2n kh\u00f4ng x\u1ea3 n\u01b0\u1edbc b\u1ea9n, r\u00e1c th\u1ea3i v\u00e0o s\u00f4ng h\u1ed3.<\/p>\n Trang 61 sgk \u0110\u1ecba L\u00ed 12:\u00a0<\/b>H\u00e3y cho bi\u1ebft kh\u1ea3 n\u0103ng khai th\u00e1c v\u00e0 y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i t\u00e0i nguy\u00ean kho\u00e1ng s\u1ea3n, t\u00e0i nguy\u00ean du l\u1ecbch, t\u00e0i nguy\u00ean n\u01b0\u1edbc.<\/i><\/span><\/p>\n Tr\u1ea3 l\u1eddi:<\/b><\/p>\n – T\u00e0i nguy\u00ean kho\u00e1ng s\u1ea3n<\/p>\n + N\u01b0\u1edbc ta c\u00f3 h\u00e0ng ngh\u00ecn m\u1ecf kho\u00e1ng s\u1ea3n, ph\u1ea7n nhi\u1ec1u l\u00e0 m\u1ecf nh\u1ecf, ph\u00e2n t\u00e1n. Nhi\u1ec1u n\u01a1i khai th\u00e1c b\u1eeba b\u00e3i, kh\u00f4ng ph\u00e9p g\u00e2y l\u00e3ng ph\u00ed t\u00e0i nguy\u00ean v\u00e0 \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.<\/p>\n + C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7: Qu\u1ea3n l\u00ed ch\u1eb7t ch\u1ebd vi\u1ec7c khai th\u00e1c, x\u1eed l\u00fd nh\u1eefng tr\u01b0\u1eddng h\u1ee3p vi ph\u1ea1m lu\u1eadt.<\/p>\n – T\u00e0i nguy\u00ean du l\u1ecbch<\/p>\n + T\u00e0i nguy\u00ean du l\u1ecbch n\u01b0\u1edbc ta r\u1ea5t \u0111a d\u1ea1ng, phong ph\u00fa v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb cao, nh\u01b0ng t\u00ecnh tr\u1ea1ng \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng x\u1ea3y ra \u1edf nhi\u1ec1u \u0111i\u1ec3m du l\u1ecbch khi\u1ebfn c\u1ea3nh quan du l\u1ecbch b\u1ecb suy tho\u00e1i.<\/p>\n + C\u1ea7n b\u1ea3o t\u1ed3n, t\u00f4n t\u1ea1o gi\u00e1 tr\u1ecb t\u00e0i nguy\u00ean du l\u1ecbch v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng du l\u1ecbch kh\u1ecfi b\u1ecb \u00f4 nhi\u1ec5m, ph\u00e1t tri\u1ec3n du l\u1ecbch sinh th\u00e1i.<\/p>\n – C\u00e1c ngu\u1ed3n t\u00e0i nguy\u00ean thi\u00ean nhi\u00ean kh\u00e1c nh\u01b0u t\u00e0i nguy\u00ean kh\u00ed h\u1eadu (nhi\u1ec7t, n\u1eafng, gi\u00f3, kh\u00f4ng kh\u00ed,..) t\u00e0i nguy\u00ean bi\u1ec3n \u1edf n\u01b0\u1edbc ta r\u1ea5t d\u1ed3i d\u00e0o, kh\u1ea3 n\u0103ng khai th\u00e1c r\u1ea5t cao\u2026 c\u0169ng c\u1ea7n \u0111\u01b0u\u1ecdc khai th\u00e1c, s\u1eed d\u1ee5ng h\u1ee3p l\u00ed v\u00e0 b\u1ea3o v\u1ec7 \u0111\u1ec3 ph\u00e1t tri\u1ec3n b\u1ec1n v\u1eefng.<\/p>\n C\u00c2U H\u1eceI V\u00c0 B\u00c0I T\u1eacP<\/strong><\/p>\n C\u00e2u 1: N\u00eau t\u00ecnh tr\u1ea1ng suy gi\u1ea3m t\u00e0i nguy\u00ean r\u1eebng v\u00e0 suy gi\u1ea3m \u0111a d\u1ea1ng sinh h\u1ecdc \u1edf n\u01b0\u1edbc ta. C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 r\u1eebng v\u00e0 b\u1ea3o v\u1ec7 \u0111a d\u1ea1ng sinh h\u1ecdc.<\/b><\/span><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n 1. T\u00e0i nguy\u00ean r\u1eebng<\/b><\/p>\n – Suy gi\u1ea3m t\u00e0i nguy\u00ean r\u1eebng: \u0110\u1ed9 che ph\u1ee7 r\u1eebng \u1edf n\u01b0\u1edbc ta n\u0103m 1943 l\u00e0 43%. N\u0103m 1983, gi\u1ea3m xu\u1ed1ng c\u00f2n 22 %. \u0110\u1ebfn n\u0103m 2006, t\u0103ng l\u00ean \u0111\u1ea1t 39%. M\u1eb7c d\u00f9 t\u1ed5ng di\u1ec7n t\u00edch r\u1eebng \u0111ang \u0111\u01b0\u1ee3c ph\u1ee5c h\u1ed3i, nh\u01b0ng t\u00e0i nguy\u00ean r\u1eebng v\u1eabn b\u1ecb suy tho\u00e1i v\u00ec ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng kh\u00f4ng ng\u1eebng b\u1ecb gi\u1ea3m s\u00fat.<\/p>\n – Bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean r\u1eebng:<\/p>\n + Theo quy ho\u1ea1ch, ph\u1ea3i n\u00e2ng \u0111\u1ed9 che ph\u1ee7 r\u1eebng c\u1ee7a c\u1ea3 n\u01b0\u1edbc l\u00ean 45 – 50%, v\u00f9ng n\u00fai d\u1ed1c ph\u1ea3i \u0111\u1ea1t 70 – 80%.<\/p>\n + Nh\u1eefng quy \u0111\u1ecbnh v\u1ec1 nguy\u00ean t\u1eafc qu\u1ea3n l\u00ed, s\u1eed d\u1ee5ng v\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ed1i v\u1edbi ba lo\u1ea1i r\u1eebng:<\/p>\n C\u00e2u 2: H\u00e3y n\u00eau t\u00ecnh tr\u1ea1ng suy tho\u00e1i t\u00e0i nguy\u00ean \u0111\u1ea5t v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 \u0111\u1ea5t \u1edf v\u00f9ng \u0111\u1ed3i n\u00fai v\u00e0 v\u00f9ng \u0111\u1ed3ng b\u1eb1ng.<\/b><\/span><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n a, Suy tho\u00e1i t\u00e0i nguy\u00ean \u0111\u1ea5t<\/p>\n – Di\u1ec7n t\u00edch \u0111\u1ea5t tr\u1ed1ng, \u0111\u1ed3i tr\u1ecdc gi\u1ea3m m\u1ea1nh (n\u0103m 2006, c\u1ea3 nu\u1edbe ch\u1ec9 c\u00f2n kho\u1ea3ng 5,35 tri\u1ec7u ha di\u1ec7n t\u00edch \u0111\u1ea5t hoang, \u0111\u1ed3i n\u00fai tr\u1ecdc (gi\u1ea3m g\u1ea7n 1\/2 di\u1ec7n t\u00edch so v\u1edbi n\u0103m 1990).<\/p>\n – Di\u1ec7n t\u00edch \u0111\u1ea5t b\u1ecb suy tho\u00e1i v\u1eabn c\u00f2n r\u1ea5t l\u1edbn (hi\u1ec7n nay c\u00f3 kho\u1ea3ng 9,3 tri\u1ec7u ha \u0111\u1ea5t b\u1ecb \u0111e do\u1ea1 sa m\u1ea1c h\u00f3a).<\/p>\n b, C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 t\u00e0i nguy\u00ean \u0111\u1ea5t:<\/p>\n – \u0110\u1ed1i v\u1edbi v\u00f9ng \u0111\u1ed3i n\u00fai: \u0110\u1ec3 ch\u1ed1ng x\u00f3i m\u00f2n tr\u00ean \u0111\u1ea5t d\u1ed1c ph\u1ea3i \u00e1p d\u1ee5ng t\u1ed5ng th\u1ec3: c\u00e1c bi\u1ec7n ph\u00e1p thu\u1ef7 l\u1ee3i, canh t\u00e1c n\u00f4ng – l\u00e2m (l\u00e0m ru\u1ed9ng b\u1eadc thang \u0111\u00e0o h\u1ed1 v\u1ea3y c\u00e1, tr\u1ed3ng c\u00e2y theo b\u0103ng). C\u1ea3i t\u1ea1o \u0111\u1ea5t hoang \u0111\u1ed3i tr\u1ecdc b\u1eb1ng c\u00e1c bi\u1ec7n phap n\u00f4ng l\u00e2m k\u1ebft h\u1ee3p. B\u1ea3o v\u1ec7 r\u1eebng v\u00e0 \u0111\u1ea5t r\u1eebng, t\u1ed5 ch\u1ee9c \u0111\u1ecbnh canh, \u0111\u1ecbnh c\u01b0 cho d\u00e2n c\u01b0 mi\u1ec1n n\u00fai.<\/p>\n – \u0110\u1ed1i v\u1edbi \u0111\u1ed3ng b\u1eb1ng:<\/p>\n + C\u1ea7n c\u00f3 bi\u1ec7n ph\u00e1p qu\u1ea3n l\u00ed ch\u1eb7t ch\u1ebd v\u00e0 c\u00f3 k\u1ebf ho\u1ea1ch m\u1edf r\u1ed9ng di\u1ec7n t\u00edch \u0111\u1ea5t n\u1ed3ng nghi\u1ec7p. \u0110\u1ed3ng th\u1eddi v\u1edbi th\u00e2m canh, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng \u0111\u1ea5t, c\u1ea7n canh t\u00e1c s\u1eed d\u1ee5ng \u0111\u1ea5t h\u1ee3p l\u00ed, ch\u1ed1ng b\u1ea1c m\u00e0u, gi\u00e2y, nhi\u1ec5m m\u1eb7n, nhi\u1ec5m ph\u00e8n. B\u00f3n ph\u00e2n c\u1ea3i t\u1ea1o \u0111\u1ea5t th\u00edch h\u1ee3p.<\/p>\n + C\u1ea7n c\u00f3 bi\u1ec7n ph\u00e1p ch\u1ed1ng \u00f4 nhi\u1ec5m l\u00e0m tho\u00e1i ho\u00e1 \u0111\u1ea5t do ch\u1ea5t \u0111\u1ed9c ho\u00e1 h\u1ecdc, thu\u1ed1c tr\u1eeb s\u00e2u, n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p ch\u1ee9a ch\u1ea5t \u0111\u1ed9c h\u1ea1i, ch\u1ea5t b\u1ea9n ch\u1ee9a nhi\u1ec1u vi khu\u1ea9n g\u00e2y b\u1ec7nh h\u1ea1i c\u00e2y tr\u1ed3ng.<\/p>\n C\u00e2u 3: N\u00eau c\u00e1c lo\u1ea1i t\u00e0i nguy\u00ean kh\u00e1c c\u1ea7n s\u1eed d\u1ee5ng h\u1ee3p l\u00ed v\u00e0 b\u1ea3o v\u1ec7<\/b><\/span><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n a, T\u00e0i nguy\u00ean n\u01b0\u1edbc<\/p>\n – T\u00ecnh h\u00ecnh s\u1eed d\u1ee5ng: th\u1eeba n\u01b0\u1edbc g\u00e2y l\u0169 l\u1ee5t v\u00e0o m\u00f9a m\u01b0a, thi\u1ebfu n\u01b0\u1edbc g\u00e2y h\u1ea1n h\u00e1n v\u00e0o m\u00f9a kh\u00f4 v\u00e0 \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc.<\/p>\n – C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7<\/p>\n + T\u0103ng \u0111\u1ed9 che ph\u1ee7, canh t\u00e1c \u0111\u00fang k\u0129 thu\u1eadt tr\u00ean \u0111\u1ea5t d\u1ed1c \u0111\u1ec3 gi\u1eef n\u01b0\u1edbc v\u00e0o m\u00f9a m\u01b0a, t\u0103ng l\u01b0\u1ee3ng n\u01b0\u1edbc th\u1ea5m v\u00e0o m\u00f9a kh\u00f4.<\/p>\n + X\u1eed l\u00ed h\u00e0nh ch\u00ednh \u0111\u1ed1i v\u1edbi c\u00e1c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t, d\u1ecbch v\u1ee5, d\u00e2n c\u01b0 kh\u00f4ng th\u1ef1c hi\u1ec7n \u0111\u00fang quy \u0111\u1ecbnh v\u1ec1 n\u01b0\u1edbc th\u1ea3i, nh\u1eb1m ng\u0103n ch\u1eb7n ngu\u1ed3n g\u00e2y \u00f4 nhi\u1ec5m nu\u1edbc.<\/p>\n + Tuy\u00ean truy\u1ec1n, gi\u00e1o d\u1ee5c cho ng\u01b0\u1eddi d\u00e2n kh\u00f4ng x\u1ea3 n\u01b0\u1edbc b\u1ea9n, r\u00e1c th\u1ea3i v\u00e0o s\u00f4ng h\u1ed3.<\/p>\n b, T\u00e0i nguy\u00ean kho\u00e1ng s\u1ea3n<\/p>\n – T\u00ecnh h\u00ecnh s\u1eed d\u1ee5ng: n\u01b0\u1edbc ta c\u00f3 3500 m\u1ecf kho\u00e1ng s\u1ea3n, ph\u1ea9n nhi\u1ec1u l\u00e0 m\u1ecf nh\u1ecf, ph\u00e2n t\u00e1n. Nhi\u1ec1u n\u01a1i khai th\u00e1c b\u1eeba b\u00e3i, kh\u00f4ng ph\u00e9p, g\u00e2y l\u00e3ng ph\u00ed t\u00e0i nguy\u00ean v\u00e0 \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng<\/p>\n – C\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7: qu\u1ea3n l\u00ed ch\u1eb7t ch\u1ebd vi\u1ec7c khai th\u00e1c, x\u1eed l\u00ed nh\u1eefng tr\u01b0\u1eddng h\u1ee3p vi ph\u1ea1m lu\u1eadt.<\/p>\n c, T\u00e0i nguy\u00ean du l\u1ecbch<\/p>\n – T\u00ecnh tr\u1ea1ng \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng x\u1ea3y ra \u1edf nhi\u1ec1u \u0111i\u1ec3m du l\u1ecbch khi\u1ebfn c\u1ea3nh quan du l\u1ecbch b\u1ecb suy tho\u00e1i.<\/p>\n – C\u1ea7n b\u1ea3o t\u1ed3n, t\u00f4n t\u1ea1o gi\u00e1 tr\u1ecb t\u00e0i nguy\u00ean du l\u1ecbch vaf b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng du l\u1ecbch kh\u1ecfi b\u1ecb \u00f4 nhi\u1ec5m, ph\u00e1t tri\u1ec3n du l\u1ecbch sinh th\u00e1i.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":" Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi\u00a0in nghi\u00eang Trang 58 sgk \u0110\u1ecba L\u00ed 12:\u00a0Nh\u1eadn x\u00e9t v\u1ec1 bi\u1ebfn \u0111\u1ed9ng di\u1ec7n t\u00edch r\u1eebng qua giai \u0111o\u1ea1n 1943 – 1983 v\u00e0 1983 – 2006. Gi\u1ea3i th\u00edch v\u00ec sao c\u00f3 s\u1ef1 thay \u0111\u1ed5i \u0111\u00f3. Tr\u1ea3 l\u1eddi: – Giai \u0111o\u1ea1n 1943 – 1983: t\u1ed5ng di\u1ec7n t\u00edch c\u00f3 r\u1eebng, di\u1ec7n t\u00edch r\u1eebng t\u1ef1 nhi\u00ean, […]<\/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\n