Hort 1 – Objective 24.01 Nutrients B. Functions of nutrients & symptoms of deficiencies 1.Primary...
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Transcript of Hort 1 – Objective 24.01 Nutrients B. Functions of nutrients & symptoms of deficiencies 1.Primary...
![Page 1: Hort 1 – Objective 24.01 Nutrients B. Functions of nutrients & symptoms of deficiencies 1.Primary nutrients a. Nitrogen 1.Functions: a)Promotes growth.](https://reader036.fdocuments.net/reader036/viewer/2022062423/5697bf8a1a28abf838c8ad69/html5/thumbnails/1.jpg)
Hort 1 – Objective 24.01 Nutrients
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B. Functions of nutrients & symptoms of deficiencies1.Primary nutrients
a. Nitrogen1.Functions:
a)Promotes growth of leaves & stems
b) Gives dark green color & improves quality of foliage
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c) Necessary to develop cell proteins & chlorophyll2) Deficiency symptoms:
a) sick, yellow-green colorb) Short stems, small
leaves, pale colored leaves & flowersc) Slow & dwarfed plant growth
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b. Phosphorus1) functions: a) Stimulates early formation & growth of rootsb) Provides for fast & vigorous growth & speeds maturityc) Stimulates flowering & seed developmentd) Necessary for the enzyme action of many plant processes
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2) Deficiency symptoms:a)Decrease in
growth
b) slow maturity
c) older leaves are purplish color
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c. Potassium1)functions:
a) used to form carbohydrates & proteinsb) Formation & transfer of starches, sugars, & oilsc) Increases disease resistance, vigor, & hardiness
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2) Deficiency symptomsa) mottled, spotted,
streaked or curled leavesb) scorched, burned, dead leaf tips & margins
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2. Secondary nutrientsa. Calcium
1)functions:
a) improves vigor
b) Influences intake & synthesis of other plant nutrientsc) Important part of cell walls
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2) Deficiency symptoms
a) Small developing leaves, wrinkled older leavesb) Dead stem tips
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b. Magnesium1) functions:
a) Influence the intake of other essential nutrientsb) Helps make fats
c) Assists in translocation of phosphorus & fats
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2) Deficiency symptomsa) Interveinal chlorosis – yellowing of leaves between green veins
b) Leaf tips curl or cup upward
c) slender, weak stems
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c. Sulfur1)functions:
a) Promotes root growth & vigorous vegetative growth
b) Essential to protein formation
![Page 13: Hort 1 – Objective 24.01 Nutrients B. Functions of nutrients & symptoms of deficiencies 1.Primary nutrients a. Nitrogen 1.Functions: a)Promotes growth.](https://reader036.fdocuments.net/reader036/viewer/2022062423/5697bf8a1a28abf838c8ad69/html5/thumbnails/13.jpg)
2) Deficiency symptomsa) Young leaves are light green with lighter color veinsb) Yellow leaves and stunted growth
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3. Micro nutrientsa. Iron
1) functions
a) Essential for chlorophyll productionb) Helps carry electrons to mix oxygen with other elements
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2. Deficiency symptomsa) Mottled & interveinal chlorosis in young leaves
b) Stunted growth & slender, short stems
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b. Copper1) Functions
a) helps in the use of iron
b) helps regulate respiration
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2) Deficiency symptomsa) Young leaves are
small & permanently wiltb) Multiple buds at stem tips
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c. Zinc1)Functions
a) plant metabolismb) Helps form growth hormonesc) reproduction
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2) Deficiency symptomsa) Retarded growth between nodes (rosetted)b) New leaves are thick & smallc) Spotted between veins, discolored veins
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d. Boron1) functions
a) Affects water absorption by rootsb) Translocation of sugars
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2) Deficiency symptomsa) short, thick stem
tipsb) Young leaves of terminal buds are light green at base
c) Leaves become twisted & die
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e. Manganese1)Functions
a) plant metabolism
b) nitrogen transformation
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2) Deficiency symptoms
a) Interveinal chlorosis
b) young leaves die
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f. Molybdenum1)Functions
a) plant development
b) reproduction2) Deficiency symptoms a) stunted growth
b) yellow leaves, upward curling leaves, leaf margins burn
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g. Chlorine1)Functions
a) essential to some plant processes b) acts in enzyme system2) Deficiency symptoms
a) Usually more problems with too much chlorine or toxicity than with deficiency