Abstract
The effects of amending soil with organic (poultry manure) and inorganic fertilizer on yield and chlorophyll content of maize (Zea mays L.) and sorghum (Sorghum bicolour (L.) Moench) was carried out at the Teaching and Research (T&R) Farm of the Obafemi Awolowo University, (O.A.U.) Ile - Ife, Nigeria. The experiment was a randomised complete block design (RCBD), laid out in a split-plot arrangement in the second cropping season of year 2001 and 2002. There were four sources of fertilizer for soil amendment: inorganic fertilizer (IF), mixture of inorganic fertilizer and poultry manure (IFPM), poultry manure (PM) and control (C) (no fertilizer or manure treatment). Each fertilizer source supplied 54 kg N plus 25 kg P2O5 and 25 kg K2O5/ha. There were significant variability and diversity observed on the two crops due to treatments. Grain yield was highest in sorghum (3.55 kg/ha) and maize (2.89 kg/ha) under IFPM followed by IF treatment for maize (2.33 kg/ha) and PM treatment for sorghum ((3.37 kg/ha). Sorghum and maize had the highest dry matter of 72.3 g/plant and 71.0 g/plant under IFPM at harvest. The effects of PM on the dry matter of sorghum (68.1 g/plant) and maize (61.7 g/plant) were not significantly different (p = 0.05) from that of IF (sorghum 66.1 g/plant, maize 58.7 g/plant). Sorghum also had the highest leaf area (LA) (2752.9 cm2/plant) and total chlorophyll content of 3.28 mg/g under PM while maize on the other hand had the highest LA (1969.5 cm2/plant) and total chlorophyll content of 2.63 mg/g under IFPM. In both maize and sorghum, the lowest chlorophyll content occurred in control plot. Drought tolerance measured as percentage chlorophyll stability index (CSI%) was highest under control plots in both crops. Key words: Maize, sorghum, cultivars, nutrient source, poultry manure, chlorophyll, yield.
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Claims 16
Claim · model-written summary
Sorghum grain yield was highest under IFPM at 3.55 kg/ha.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was highest in sorghum (3.55 kg/ha) and maize (2.89 kg/ha) under IFPM”
e1“mixture of inorganic fertilizer and poultry manure (IFPM)”
Claim · model-written summary
Maize grain yield was highest under IFPM at 2.89 kg/ha.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was highest in sorghum (3.55 kg/ha) and maize (2.89 kg/ha) under IFPM”
Claim · model-written summary
Maize grain yield under IF was 2.33 kg/ha, second to IFPM.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by IF treatment for maize (2.33 kg/ha)”
Claim · model-written summary
Sorghum grain yield under PM was 3.37 kg/ha, second to IFPM.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PM treatment for sorghum ((3.37 kg/ha)”
Claim · model-written summary
Sorghum dry matter was highest under IFPM at 72.3 g/plant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum and maize had the highest dry matter of 72.3 g/plant and 71.0 g/plant under IFPM at harvest.”
Claim · model-written summary
Maize dry matter was highest under IFPM at 71.0 g/plant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum and maize had the highest dry matter of 72.3 g/plant and 71.0 g/plant under IFPM at harvest.”
Claim · model-written summary
Sorghum dry matter under PM was not significantly different from IF.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of PM on the dry matter of sorghum (68.1 g/plant) and maize (61.7 g/plant) were not significantly different (p = 0.05) from that of IF (sorghum 66.1 g/plant, maize 58.7 g/plant).”
Claim · model-written summary
Maize dry matter under PM was not significantly different from IF.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of PM on the dry matter of sorghum (68.1 g/plant) and maize (61.7 g/plant) were not significantly different (p = 0.05) from that of IF (sorghum 66.1 g/plant, maize 58.7 g/plant).”
Claim · model-written summary
Sorghum leaf area was highest under PM at 2752.9 cm2/plant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum also had the highest leaf area (LA) (2752.9 cm2/plant) and total chlorophyll content of 3.28 mg/g under PM”
Claim · model-written summary
Sorghum total chlorophyll was highest under PM at 3.28 mg/g.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum also had the highest leaf area (LA) (2752.9 cm2/plant) and total chlorophyll content of 3.28 mg/g under PM”
Claim · model-written summary
Maize leaf area was highest under IFPM at 1969.5 cm2/plant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize on the other hand had the highest LA (1969.5 cm2/plant) and total chlorophyll content of 2.63 mg/g under IFPM”
Claim · model-written summary
Maize total chlorophyll was highest under IFPM at 2.63 mg/g.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize on the other hand had the highest LA (1969.5 cm2/plant) and total chlorophyll content of 2.63 mg/g under IFPM”
Claim · model-written summary
Maize chlorophyll was lowest under control treatment.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both maize and sorghum, the lowest chlorophyll content occurred in control plot.”
Claim · model-written summary
Sorghum chlorophyll was lowest under control treatment.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both maize and sorghum, the lowest chlorophyll content occurred in control plot.”
Claim · model-written summary
Maize chlorophyll stability index was highest in control plots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought tolerance measured as percentage chlorophyll stability index (CSI%) was highest under control plots in both crops.”
e1“maize and sorghum”
Claim · model-written summary
Sorghum chlorophyll stability index was highest in control plots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought tolerance measured as percentage chlorophyll stability index (CSI%) was highest under control plots in both crops.”
e1“maize and sorghum”
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