pbl physio
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GROUP MEMBERS:
1. NOOR HAZIMAH HUSNA
BINTI MOHD JOHAR
(D20091034853)
2. FATIN NAJWA BINTI ABD
RAHMAN
(D20091036609)
3. SYAZWANI BINTI KARIM
(D20091034879)
4. NOOR IZZATIE BINTI AMIR
(D20091034878)
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LEARNING ISSUE
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What are the methods to maintain the
plants to survive?Why plant grow well before the droughts
season?
How dry seasons effects the growing ofplants?
Howphotosynthesisaffectedbydrought
season?
What are the essential nutrient for crops to
grow healthy?
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MULCH CAN REDUCE WATER LOSS FROM
PLANT.
THIS MAKE OUR PLANT TO SURVIVE LONGER
THEN WE EXPECTED.
USUALLY, MULCHIS USED AFTER WE
CULTIVATE THE PLANT FOR GIVE THE
PROTECTION FROM DIRECT SUNLIGHT.
MULCH MADE UP FROM LEAVES OR STEM
AND WILL BE PUT ON THE PLANT.
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SHADOW FOR MINIMIZE THE
INTENSITY OF SUNLIGHT.
THE CHARACTERS OF SHADOW
PLANT IS THE TEXTURE THAT
FEATURES CROWN OF SOMERSET, HASBROAD LEAVES AND LONG BRANCHES
IN THE SHAPE OF AN UMBRELLA. THIS
TYPE OF SHADOW TREE IS NOT EASILY
BROKEN BY WIND.
Examples: Semarak Api (Delonix
regia),Tembusu (Fragea fragrans),
Bungor (Lagerstroemis speciosa) dan
Bunga Tanjung (Mimusop elengi)
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Theseareusuallythemost
inexpensivewaytomakesure
waterreachesasmuchastoour
plant.
Simplyscrewyourwaterhose
intotheendofthesprinkler, setthesprinklerforthecoverageyou
want, andplaceitintheproper
locationofyourgarden.
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Whyplantgrowwellbefore
thedroughtseason?
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Environmental plant growth factors
-Crucialelementthatinfluence
plantgrowth
- Temperatureofsurrounding
atm andsoilmatters
- Optimumtemperaturepre-
requisitesforplantprocesses
(photosynthesis,respiration,
germination)
Temperature
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Moistureimportantfactorin
growthofplants.
Defineasratioofwatervapour
intheairtotheamountofwater
intheair.
Usebyplantfortranspiration
Relative humidity
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Soilwithproperhumidityand
rightbalanceofalltheminerals
andnutrientsareessentialfor
plantgrowth
TherightpHbalancewhich
measuresthealkalinityoracidityofthesoilandpresence
ofcertainchemicals
SOIL
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HOW DRY
SEASON
EFFECT THE
PLANT?
SEED
GERMINATIONTRANSPIRATION
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Embryo in a mature seed is dehydrated.
Watery environment is necessary for activemetabolism.
Uptakeofwaterinduce GA synthesisbyembryo
GA stimulatealeuronetoproduce-amylase
-amylasebreakdownstarchstoredinendosperm
Glucoseproducedactasfuelforembryogrowth
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Loss of water vapour from leaf by diffusion and
evaporation is called TRANSPIRATION.
On a sunny,warm day: Aslongasstomataopen,transpirationisgreatest. Whentranspirationcant
pullsufficientwatertotheleaf,cellloseturgorpressure.
Mild drought: Plantrespondbyclosingstomata,butevaporationstilloccurthroughcuticle.
Prolonged drought:Leavescanbecomeseverelywiltedandirreversiblyinjured.
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WHAT ARE THE NUTRIENT FORCROPS TO GROWHEALTHY?
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TYPES OF
NUTR
IENTS
ESSENTIAL
NUTRIENT
-Theelementsthatare
requiredor
necessary
for plants tocompletetheir
lifecycle.
BENEFICIAL
NUTRIENT
-Additional to the17 elements
requirement of
some plants, but
they exclude from
the list of table.
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Requiredinlargeamount
Consist 9elements-
H,C,O,P,N,K,Ca,Mg,S
macronutrients
Requiredinsmall
quantity.
Consist 8 elements-
Cl,B,Fe,Mn,Zn,Cu,Ni
,Mo.
micronutrients
Essential element nutrients
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Macronutrients
Divided into two groups :
- primary nutrients
- secondary nutrients
Primary nutrients
- use large amount for growth and survival.
- eg: Nitrogen(N), phosphorus(P),
potassium(K).
- Nitrogen:promote plants growth,important fornormal plant development.
- Phosphorus: important in stimulating root
development.
- Potassium: water regulation, resist drougt and diseases.
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Secondary nutrients
-use small amount.
-eg: calcium(Ca), magnesium(Mg), Sulphur(S)
-magnesium :important for crop quality,
support plant growth.
- Calcium: development of root system,shoot
tips and storage organ.
- Sulphur : ensure protein content is enough.
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