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UNIVERSITI TUN HUSSEIN ONN MALAYSIA

KEMAHIRAN TUMPUAN DALAM SAINS
BBR 36903

TUGASAN INDIVIDU

UNTUK PERHATIAN: EN. GHAZALLY BIN SPAHAT
NAMA

: NORHALIZA BINTI KAMSAN

NO MATRIKS

: DB100015

KELAS

: SAINS SEKSYEN 1
Tarikh: 22 November 2012
Masa : 6.00 pm
Kamera : Apple iPad

Setahunkemudian………………………

Tarikh : 23 November 2013
Masa : 6.45pm
Kamera : Apple iPad
DI SEBALIK PENEBANGAN POKOK KELAPA

Gambar di atasmerupakansebuahkawasan di pinggirbandar yang
dipenuhidengantanamanpokokkelapa. Kebanyakanpokokkelapainitelahwujud di
kawasaninilebihdaripada 30 tahun. Setiapharibertandan - tandanbuahkelapa,
pelepahdaunkelapagugurmemberipelbagaimanfaatkepadapenduduksetempat.
Pokokkelapa (Cocosnucifera L.)
adalahahlikeluarga Arecaceae (keluargapalma). Iamerupakan spesies tunggal yang
dikelaskandalam genusCocos danmerupakan pokokpalma yang besar, tumbuhsetinggi
30 meter, denganpelepahdaun (pinnate) sepanjang 4-6 meter, denganhelaiandaun
(pinnae) sepanjang 60-90 cm; pelepahtualuruhmeninggalkanbatangpokok yang licin.
Seperti yang diketahuipokokkelapadikenalisebagaipokokseribuguna.
Setiapbahagiankelapamemberipelbagaikegunaankepadakehidupanmanusia. Isi
buahkelapabolehdimakanbegitusahajaselaindaripadadijadikansantansebagaibahanmas
akan. Isi yang keringdikenalisebagai ‘copra’ yang
manadiprosesuntukdijadikanminyak. Saki bakidaripadaisikelapa yang
keringbolehdijadikansumbermakananbagihaiwanternakansepertilembu.
Manakaladaunkelapa yang
telahdirautdapatdijadikansebagaikelongsongketupatdanlidinyadijadikanpenyapudanlid
i sate.
Ketinggianpokokkelapa yang bolehmencecahsehingga 30 meter
banyakmemberikesankepadapersekitarannya. Sesetengahsituasimemberikesan yang
positifdanjugaturutmenyumbangkesannegatif. Deretanpokokkelapa di
persisiranpantaimembantumengawalanginkencang. Namunbagipokokkelapa yang
hidup di kawasan yang terdapatpenduduk di sekitarnya,
iabolehmenjadiigauanngeriterutamasewaktuangin rebut melanda.
Banyakceritakemalangan yang
adakalanyasehinggameragutnyawaapabilapokokkelapatumbang. Olehsebabitu, ramai
yang
mengambilalternatifmenebangpokokinisebagailangkahkeselamatandaripadakejadian
yang tidakdiingini.
Setelahsetahunberlalu, kawasaninimengalamipelbagaiperubahan. Paling
ketara, sinaranmataharibegituterikmenyinarikawasanini.
Peningkatansuhudirasaiolehpenduduksetempat. Tiadalagidedaunhijau yang melambai
– lambaimelindungihidupan di bawahnya.
Seterusnyaakanmengurangkanhujanataumengubahcorakhujan yang
lazimnyaberlakusehinggamewujudkanfenomenakemarau.
Pengurangankelembapanudaraekorandaripadafungsinyauntukmembebaskanwap-wap
air keudaramelalui proses transpirasisudahhilangatauberkurangan.
Udarasekitarmenjadikeringdancuacamenjadipanas. Tumbuhan yang
adatidakmampuberfungsisepenuhnyauntukmenyederhanakansuhudengancaramemeran
gkapbahanganmataharidanmembebaskanwap-wap air menerusi proses perpeluhan.
Apabilahaliniberlaku,
penduduksetempatmulamemasangalatpenghawadinginbagimeredakanpeningkatansuh
u yang merekarasai. Bagi yang tidakberkemampuan,
merekalebihkerapmemasangkipaswaima di malamhari.
Tanpamerekasedarimerekatelahmeningkatkanpenggunaantenagaelektrikbagisetiaprum
ah. Selainitu,
penggunaanpenghawadinginturutmenyebabkanberlakunyapembebasankloroflorokarbo
n CFC yang bolehmenipiskanlapisanozon di atmosfera.Kedua –
duakesanburukinimerupakan factor kepadapencemaranalam.
Penebanganpokokkelapaturutmemberikesankepadastrukturtanah di
kawasanini. Disebabkankawasaninimerupakantanahberpasir,
makacengkamantanahterhadapaliran air sangatlonggar.
Ditambahlagikekurangantumbuhanyang berperananmenyerap air di
sekitarkawasanini. Seringkalilaluanberpasirmenjadilembikterutamaselepashujan yang
lebat. Initurutmenjadipunca paras air di
sungaiakannaikseterusnyamenggalakkankejadianbanjir.
Walaubagaimanapun, terdapatkesan lain yang dapatdilihat di
kawasanpersekitaranini. Banyaktumbuhanrenek yang hidup di sekitarpokok –
pokokkelapatumbuhlebihsuburdaripadasebelumiaditebang. Lalang,rumput,
ubikayudantumbuhan liar yang lain hiduplebihsuburdisebabkantiadapersaingan yang
kuatterhadapkeperluanasastumbuhan.
Bagimengurangkankesannegatifberpanjanganakibatpenebanganpokokkelapa,
penanamansemulakelapasecaraefektifdansistematikperludilaksanakanbagimengembali
kannikmatkehijauansemulajadiwalaupunmengambilmasa yang lama.
Penanamansemulainibertujuanuntukmengawalhakisantanah,
kehilangannutrienmelaluilarutresap, menyuburkantanahdenganpenambahan nitrogen
dalamtanah, mengekalkelembapantanah,
memperbaikistrukturtanahdanpengudaraandalamtanahsertamencegahpertumbuhanrum
pai.Selaindaripadapokokkelapa, tanaman lain
turutmenjadialternatifbagipenanamamsemulatumbuhansepertimangga, jambu,
rambutandanpulasan.

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Kesan penebangan pokok kelapa

  • 1. UNIVERSITI TUN HUSSEIN ONN MALAYSIA KEMAHIRAN TUMPUAN DALAM SAINS BBR 36903 TUGASAN INDIVIDU UNTUK PERHATIAN: EN. GHAZALLY BIN SPAHAT NAMA : NORHALIZA BINTI KAMSAN NO MATRIKS : DB100015 KELAS : SAINS SEKSYEN 1
  • 2. Tarikh: 22 November 2012 Masa : 6.00 pm Kamera : Apple iPad Setahunkemudian……………………… Tarikh : 23 November 2013 Masa : 6.45pm Kamera : Apple iPad
  • 3. DI SEBALIK PENEBANGAN POKOK KELAPA Gambar di atasmerupakansebuahkawasan di pinggirbandar yang dipenuhidengantanamanpokokkelapa. Kebanyakanpokokkelapainitelahwujud di kawasaninilebihdaripada 30 tahun. Setiapharibertandan - tandanbuahkelapa, pelepahdaunkelapagugurmemberipelbagaimanfaatkepadapenduduksetempat. Pokokkelapa (Cocosnucifera L.) adalahahlikeluarga Arecaceae (keluargapalma). Iamerupakan spesies tunggal yang dikelaskandalam genusCocos danmerupakan pokokpalma yang besar, tumbuhsetinggi 30 meter, denganpelepahdaun (pinnate) sepanjang 4-6 meter, denganhelaiandaun (pinnae) sepanjang 60-90 cm; pelepahtualuruhmeninggalkanbatangpokok yang licin. Seperti yang diketahuipokokkelapadikenalisebagaipokokseribuguna. Setiapbahagiankelapamemberipelbagaikegunaankepadakehidupanmanusia. Isi buahkelapabolehdimakanbegitusahajaselaindaripadadijadikansantansebagaibahanmas akan. Isi yang keringdikenalisebagai ‘copra’ yang manadiprosesuntukdijadikanminyak. Saki bakidaripadaisikelapa yang keringbolehdijadikansumbermakananbagihaiwanternakansepertilembu. Manakaladaunkelapa yang telahdirautdapatdijadikansebagaikelongsongketupatdanlidinyadijadikanpenyapudanlid i sate. Ketinggianpokokkelapa yang bolehmencecahsehingga 30 meter banyakmemberikesankepadapersekitarannya. Sesetengahsituasimemberikesan yang positifdanjugaturutmenyumbangkesannegatif. Deretanpokokkelapa di persisiranpantaimembantumengawalanginkencang. Namunbagipokokkelapa yang hidup di kawasan yang terdapatpenduduk di sekitarnya, iabolehmenjadiigauanngeriterutamasewaktuangin rebut melanda. Banyakceritakemalangan yang adakalanyasehinggameragutnyawaapabilapokokkelapatumbang. Olehsebabitu, ramai yang mengambilalternatifmenebangpokokinisebagailangkahkeselamatandaripadakejadian yang tidakdiingini.
  • 4. Setelahsetahunberlalu, kawasaninimengalamipelbagaiperubahan. Paling ketara, sinaranmataharibegituterikmenyinarikawasanini. Peningkatansuhudirasaiolehpenduduksetempat. Tiadalagidedaunhijau yang melambai – lambaimelindungihidupan di bawahnya. Seterusnyaakanmengurangkanhujanataumengubahcorakhujan yang lazimnyaberlakusehinggamewujudkanfenomenakemarau. Pengurangankelembapanudaraekorandaripadafungsinyauntukmembebaskanwap-wap air keudaramelalui proses transpirasisudahhilangatauberkurangan. Udarasekitarmenjadikeringdancuacamenjadipanas. Tumbuhan yang adatidakmampuberfungsisepenuhnyauntukmenyederhanakansuhudengancaramemeran gkapbahanganmataharidanmembebaskanwap-wap air menerusi proses perpeluhan. Apabilahaliniberlaku, penduduksetempatmulamemasangalatpenghawadinginbagimeredakanpeningkatansuh u yang merekarasai. Bagi yang tidakberkemampuan, merekalebihkerapmemasangkipaswaima di malamhari. Tanpamerekasedarimerekatelahmeningkatkanpenggunaantenagaelektrikbagisetiaprum ah. Selainitu, penggunaanpenghawadinginturutmenyebabkanberlakunyapembebasankloroflorokarbo n CFC yang bolehmenipiskanlapisanozon di atmosfera.Kedua – duakesanburukinimerupakan factor kepadapencemaranalam. Penebanganpokokkelapaturutmemberikesankepadastrukturtanah di kawasanini. Disebabkankawasaninimerupakantanahberpasir, makacengkamantanahterhadapaliran air sangatlonggar. Ditambahlagikekurangantumbuhanyang berperananmenyerap air di sekitarkawasanini. Seringkalilaluanberpasirmenjadilembikterutamaselepashujan yang lebat. Initurutmenjadipunca paras air di sungaiakannaikseterusnyamenggalakkankejadianbanjir. Walaubagaimanapun, terdapatkesan lain yang dapatdilihat di kawasanpersekitaranini. Banyaktumbuhanrenek yang hidup di sekitarpokok – pokokkelapatumbuhlebihsuburdaripadasebelumiaditebang. Lalang,rumput, ubikayudantumbuhan liar yang lain hiduplebihsuburdisebabkantiadapersaingan yang kuatterhadapkeperluanasastumbuhan.
  • 5. Bagimengurangkankesannegatifberpanjanganakibatpenebanganpokokkelapa, penanamansemulakelapasecaraefektifdansistematikperludilaksanakanbagimengembali kannikmatkehijauansemulajadiwalaupunmengambilmasa yang lama. Penanamansemulainibertujuanuntukmengawalhakisantanah, kehilangannutrienmelaluilarutresap, menyuburkantanahdenganpenambahan nitrogen dalamtanah, mengekalkelembapantanah, memperbaikistrukturtanahdanpengudaraandalamtanahsertamencegahpertumbuhanrum pai.Selaindaripadapokokkelapa, tanaman lain turutmenjadialternatifbagipenanamamsemulatumbuhansepertimangga, jambu, rambutandanpulasan.