Abstract
Maize (Zea mays L), an important cereal crop for animal and human nutrition in Nigeria was studied for its response to Cu and Fe. application. Effects on agronomic characteristics and elemental accumulation in maize root and shoot were assessed. The Cu:Fe ratio that best enhanced growth was determined. Grains of maize were grown in a carefully washed sand placed in pots containing 4 rates of Cu at 0, 1. 5, 10 ppm as CuSO4 and Fe at 0, 10, 20, and 40 ppm as FeSO4. The plants were harvested at 10 weeks of growth. Results indicate that increasing the levels of applied Cu and Fe produced an increase in shoot root ratio and the total chlorophyll content of the maize leaf. The increase was more pronounced when Cu and Fe were combined in a 1:4 ratio (Cu10: Fe40) Iron application at increasing concentrations reduced dry matter yield shoot K and increased root K. The depressing effect of Fe at 40 ppm on plant dry matter yield was corrected by the addition of Cu at 10 ppm. The roots accumulated more Ca, P, Na, Fe, Cu, Zn and Mn than the shoot. Iron content of the shoot ranged from 476 to 889 ppm; and from 1358 to 2060 ppm in the roots, suggesting the tolerance of the maize plant to Cu and Fe. Micronutrients accumulated more in the roots than the shoot while N, P and K accumulated more in the shoot. Key Words: Maize; Cu and Fe nutrition; total chlorophyll and carotene; components of growth Moor J. Agric. Res. Vol.4(1) 2003:13-18
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Claims 10
Claim · model-written summary
Increasing copper and iron raised maize shoot to root ratio and leaf chlorophyll content.
- Treatment
- applied Cu and Fee0
- Outcome
- shoot root ratio and the total chlorophyll contente0
- Direction
- increasee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the levels of applied Cu and Fe produced an increase in shoot root ratio and the total chlorophyll content of the maize leaf”
t0“maize”
Claim · model-written summary
The increase was most pronounced at a copper to iron ratio of 1:4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase was more pronounced when Cu and Fe were combined in a 1:4 ratio (Cu10: Fe40)”
t0“maize”
Claim · model-written summary
Increasing iron reduced dry matter yield and shoot potassium.
- Treatment
- Iron application at increasing concentrationse0
- Outcome
- dry matter yield shoot Ke0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron application at increasing concentrations reduced dry matter yield shoot K and increased root K”
t0“maize”
Claim · model-written summary
Increasing iron increased root potassium.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron application at increasing concentrations reduced dry matter yield shoot K and increased root K”
t0“maize”
Claim · model-written summary
Copper at 10 ppm corrected the dry matter yield depression from iron at 40 ppm.
- Treatment
- addition of Cu at 10 ppme0
- Outcome
- plant dry matter yielde0
- Direction
- correctede0
- Comparator
- Fe at 40 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The depressing effect of Fe at 40 ppm on plant dry matter yield was corrected by the addition of Cu at 10 ppm”
t0“maize”
Claim · model-written summary
Roots accumulated more calcium, phosphorus, sodium, iron, copper, zinc and manganese than shoots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots accumulated more Ca, P, Na, Fe, Cu, Zn and Mn than the shoot”
t0“maize”
Claim · model-written summary
Shoot iron content ranged from 476 to 889 ppm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron content of the shoot ranged from 476 to 889 ppm”
t0“maize”
Claim · model-written summary
Root iron content ranged from 1358 to 2060 ppm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron content of the shoot ranged from 476 to 889 ppm; and from 1358 to 2060 ppm in the roots”
t0“maize”
Claim · model-written summary
Micronutrients accumulated more in roots than shoots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Micronutrients accumulated more in the roots than the shoot”
t0“maize”
Claim · model-written summary
Nitrogen, phosphorus and potassium accumulated more in shoots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N, P and K accumulated more in the shoot”
t0“maize”
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