| Registro completo |
| Provedor de dados: |
J. Soil Sci. Plant Nutr.
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| País: |
Chile
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| Título: |
EFFECT OF NITROGEN FERTILIZER AND MAIZE STRAW INCORPORATION ON NH4+15N AND N0(3) -15N ACCUMULATION IN BLACK SOIL OF NORTHEAST CHINA AMONG THREE CONSECUTIVE CROPPING CYCLES
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| Autores: |
Lu,Caiyan
Ma,Jian
Chen,Xin
Zhang,Xudong
Shi,Yi
Huang,Bin
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| Data: |
2010-01-01
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| Ano: |
2010
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| Palavras-chave: |
N fertilizer
Maize straw
NH4+-15N
N0(3)--15N accumulation
Black soil
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| Resumo: |
A pot experiment was conducted to evaluate the effect of nitrogen (N) fertilizer and maize straw incorporation on the accumulation of NH4+-15N and N0(3)--15N in soil inorganic N pool among three consecutive cropping cycles, aimed to search for an effective N management practice to decrease superfluous accumulation of soil inorganic N and fertilizer N losses. The results showed that the amounts of soil NH4+-15N, N0(3)-15N and inorganic 15N, and their percent to applied 15N-labeled fertilizer declined significantly with sampling time (p ≤ 0.001).Compared to low N application rate (44.64 mg N kg-1 soil), high N application rate (89.28 mg N kg-1 soil) enhanced significantly the amounts of soil NH4+-15N, N0(3)--15N and inorganic 15N by 238.6%, 132.9% and 197.3%, respectively (p ≤ 0.001). In contrast, maize straw addition declined significantly the amounts of soil NH4+-15N and inorganic 15N by 21.4% and 16.1% compared to without maize straw (p ≤ 0.001). The results suggested that a combined application of chemical fertilizer and maize straw with a wide C/N ratio is an important means for reducing the superfluous accumulation of fertilizer N as soil inorganic N to subsequently lower its loss.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000200005
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| Editor: |
Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
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| Formato: |
text/html
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| Fonte: |
Journal of soil science and plant nutrition v.10 n.4 2010
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