Abstract
A pot experiment was carried out under natural climatic conditions to determine the proportion of different nitrogen sources (air, soil, fertilizer) in cowpea and maize grown alone or in mixture using {sup 15} N isotope dilution technique. On average, the proportion of N derived from fixation by cowpea grown in mixed culture was 55% lower than that derived by the sole cropped cowpea (77%). Dry matter produced by one plant of maize grown in mixed culture was twice as much as that produced by a plant grown in mono culture. Moreover, total nitrogen content in one maize plant grown in mixed culture was 213 mg higher than that determined by two plant of maize grown in mono culture (171 mg). However, the amount of nitrogen derived from soil by maize grown in mixed culture was equal or even higher than that taken up by two plants of maize grown in mono culture. This indicates a better utilization of soil N by the maize in mixed culture. This data emphasize the crucial role of interspecific competition in soil N uptake. Data from this study do not support the hypothesis of N transfer from the legume to the cereal because no significant
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Shammaa, Mouhammad;
Kurd Ali, Fawaz
[1]
- Atomic Energy Commission, Damascus (Syrian Arab Republic). Dept. of Radiation Agriculture
Citation Formats
Shammaa, Mouhammad, and Kurd Ali, Fawaz.
Estimation of N{sub 2}-fixation in cowpea grown in monoculture or in mixture with maize using {sup 15} N.
Syrian Arab Republic: N. p.,
1994.
Web.
Shammaa, Mouhammad, & Kurd Ali, Fawaz.
Estimation of N{sub 2}-fixation in cowpea grown in monoculture or in mixture with maize using {sup 15} N.
Syrian Arab Republic.
Shammaa, Mouhammad, and Kurd Ali, Fawaz.
1994.
"Estimation of N{sub 2}-fixation in cowpea grown in monoculture or in mixture with maize using {sup 15} N."
Syrian Arab Republic.
@misc{etde_10138635,
title = {Estimation of N{sub 2}-fixation in cowpea grown in monoculture or in mixture with maize using {sup 15} N}
author = {Shammaa, Mouhammad, and Kurd Ali, Fawaz}
abstractNote = {A pot experiment was carried out under natural climatic conditions to determine the proportion of different nitrogen sources (air, soil, fertilizer) in cowpea and maize grown alone or in mixture using {sup 15} N isotope dilution technique. On average, the proportion of N derived from fixation by cowpea grown in mixed culture was 55% lower than that derived by the sole cropped cowpea (77%). Dry matter produced by one plant of maize grown in mixed culture was twice as much as that produced by a plant grown in mono culture. Moreover, total nitrogen content in one maize plant grown in mixed culture was 213 mg higher than that determined by two plant of maize grown in mono culture (171 mg). However, the amount of nitrogen derived from soil by maize grown in mixed culture was equal or even higher than that taken up by two plants of maize grown in mono culture. This indicates a better utilization of soil N by the maize in mixed culture. This data emphasize the crucial role of interspecific competition in soil N uptake. Data from this study do not support the hypothesis of N transfer from the legume to the cereal because no significant differences were found between mixed and pure maize in terms of {sup 15} N in excess content. (author). 9 refs., 1 tab.}
place = {Syrian Arab Republic}
year = {1994}
month = {Jan}
}
title = {Estimation of N{sub 2}-fixation in cowpea grown in monoculture or in mixture with maize using {sup 15} N}
author = {Shammaa, Mouhammad, and Kurd Ali, Fawaz}
abstractNote = {A pot experiment was carried out under natural climatic conditions to determine the proportion of different nitrogen sources (air, soil, fertilizer) in cowpea and maize grown alone or in mixture using {sup 15} N isotope dilution technique. On average, the proportion of N derived from fixation by cowpea grown in mixed culture was 55% lower than that derived by the sole cropped cowpea (77%). Dry matter produced by one plant of maize grown in mixed culture was twice as much as that produced by a plant grown in mono culture. Moreover, total nitrogen content in one maize plant grown in mixed culture was 213 mg higher than that determined by two plant of maize grown in mono culture (171 mg). However, the amount of nitrogen derived from soil by maize grown in mixed culture was equal or even higher than that taken up by two plants of maize grown in mono culture. This indicates a better utilization of soil N by the maize in mixed culture. This data emphasize the crucial role of interspecific competition in soil N uptake. Data from this study do not support the hypothesis of N transfer from the legume to the cereal because no significant differences were found between mixed and pure maize in terms of {sup 15} N in excess content. (author). 9 refs., 1 tab.}
place = {Syrian Arab Republic}
year = {1994}
month = {Jan}
}