Abstract
A field experiment was conducted to determine the effects of inorganic and combined organic/inorganic fertilization on growth, photosynthesis and yield of a sweet maize crop (Zea mays L. F1 hybrid Midas), under Mediterranean climatic conditions. A randomized complete block design was employed with four replicates per treatment (inorganic fertilizer (21-0-0), control and 12 combined organic (poultry, cow manure and barley) and inorganic fertilization (synthetic fertilizer: 21-0-0) treatments. The amount of N contributed to the soil via the different fertilization treatments was the same (240 kg N ha-1). Organic soil amendments increased the level of soil organic matter and total nitrogen. The highest height, dry weight, leaf area index and yield were recorded with the cow manure treatments (with or without chemical fertilizer). Moreover, combined organic and inorganic fertilizers resulted in higher increase in photosynthetic rate and stomatal conductance compared with those found under inorganic fertilization. A high correlation coefficient (r=0.926, p<0.001) between yield and photosynthetic rate was found. Sustainability yield indices (sustainable yield index and agronomic efficiency) showed that the maize crop is more stable under combined organic and inorganic fertilization compared with mineral fertilization. Our results indicate that combined organic and inorganic fertilization enhances organic matter in soils and increases yield of sweet maize.
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Claims 7
Claim · model-written summary
Organic soil amendments increased soil organic matter and total nitrogen.
- Treatment
- Organic soil amendmentse0
- Outcome
- soil organic matter and total nitrogene0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“Organic soil amendments increased the level of soil organic matter and total nitrogen”
Claim · model-written summary
Cow manure treatments had the highest sweet maize height, dry weight and leaf area index.
- Taxon
- Sweet Maizet0
- Treatment
- cow manure treatmentse0
- Outcome
- height, dry weight, leaf area indexe0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“The highest height, dry weight, leaf area index and yield were recorded with the cow manure treatments (with or without chemical fertilizer)”
t0“Sweet Maize”
Claim · model-written summary
Cow manure treatments had the highest sweet maize yield.
Not reportedComparator
Verbatim
e0“The highest height, dry weight, leaf area index and yield were recorded with the cow manure treatments (with or without chemical fertilizer)”
t0“Sweet Maize”
Claim · model-written summary
Combined organic and inorganic fertilizer increased sweet maize photosynthetic rate and stomatal conductance more than inorganic fertilizer.
Verbatim
e0“combined organic and inorganic fertilizers resulted in higher increase in photosynthetic rate and stomatal conductance compared with those found under inorganic fertilization”
t0“Sweet Maize”
Claim · model-written summary
Sweet maize yield correlated strongly with photosynthetic rate (r=0.926, p<0.001).
Not reportedOrgan / stage
Verbatim
e0“A high correlation coefficient (r=0.926, p<0.001) between yield and photosynthetic rate was found”
t0“Sweet Maize”
Claim · model-written summary
Combined organic and inorganic fertilization made sweet maize yield stability indices higher than mineral fertilizer.
- Treatment
- combined organic and inorganic fertilizatione0
- Outcome
- Sustainability yield indicese0
- Direction
- more stablee0
- Comparator
- mineral fertilizatione0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sustainability yield indices (sustainable yield index and agronomic efficiency) showed that the maize crop is more stable under combined organic and inorganic fertilization compared with mineral fertilization”
Claim · model-written summary
The authors concluded combined organic and inorganic fertilization enhances soil organic matter.
Not reportedTaxon
Verbatim
e0“combined organic and inorganic fertilization enhances organic matter in soils”
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