Næringsstoffer Flashcards

1
Q

Nævn alle makronæringsstoffer

A

Nitrogen, Kalium, Fosfor, Calcium, Magnesium og Svovl

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2
Q

Nævn alle mikronæringsstoffer

A

Zink, kobber, molybdæn, bor, klor, silicium, jern, mangan

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3
Q

Hvordan optager planter nitrogen?

A

I form af nitrat (NO3-)

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4
Q

Hvordan optager planter fosfor?

A

I form af fosfat-ionen (PO4—)

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5
Q

Hvordan optager planter kalium?

A

I form af kalium-ionen (K+)

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6
Q

Hvordan optager planter calcium?

A

I form af calcium-ionen (Ca++)

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7
Q

Hvordan optager planter magnesium?

A

I form af magnesium-ionen (Mg++)

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8
Q

Hvilken del af rødderne optager næringstoffer?

A

Rodhår

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9
Q

Hvor meget af næringsstoffet skal planten kræve for at det kvalificeres som et makronæringsstof?

A

Mindst et kilo per hektar

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10
Q

Hvor stor er en hektar? (ha)

A

10.000 kvadratmeter

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11
Q

Hvor stor er en tønde land? (tdl)

A

en halv hektar, ergo 5.000 kvadratmeter

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12
Q

Hvad er nitrogenfiksering?

A

At udnytte ren nitrogen og bruge det i organiske forbindelser. Brugt af bakterier

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13
Q

Hvilken type plante udnytter nitrogenfiksering?

A

Bælgplanter

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14
Q

Hvad er denitrificering?

A

Når der ikke er nok O2 i jorden og bakterierne derfor får det fra nitraten i jorden

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15
Q

Hvilke bakterier omdanner NH4+ til NO3-?

A

Nitrificeringsbakterier

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