Synchrony of nitrogen supply and crop demand are driven via high maize density in maize/pea strip intercropping.
Sci Rep
; 9(1): 10954, 2019 07 29.
Article
em En
| MEDLINE
| ID: mdl-31358903
Cereal density may influence the balance between nitrogen (N) supply and crop N demand in cereal/legume intercrop systems. The effect of maize (Zea mays L.) plant density on N utilization and N fertilizer supply in maize/pea (Pisum sativum L.) strip intercropping was evaluated in a field study with sole maize, sole pea, and intercropped maize/pea with three maize densities (D1, 45,000 plants ha-1; D2, 52,500 plants ha-1; D3, 60,000 plants ha-1) and two N treatments (N0, 0 kg N ha-1; N1, 450 kg N ha-1 for maize and 225 kg N ha-1 for pea). Soil mineral N in intercropped strips decreased with increased maize density. Increased maize density decreased N accumulation for intercropped pea but increased it for maize and the sum of both intercrops. The land equivalent ratio for grain yield (LER grain) showed a 24-30% advantage for intercrops than corresponding sole crops, and was greater with D3 than D1 and D2. Maize/pea intercropping had 4-113% greater nitrogen use efficiency (NUE) than sole maize, which was enhanced with increased maize density. Increasing maize density improved the synchrony of N supply and crop demand in maize/pea strip intercropping.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Solo
/
Pisum sativum
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Produtos Agrícolas
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Zea mays
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Agricultura
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Nitrogênio
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article