N available for maize (Zea mais) on living cover crops of Chromolaena odorata and Pueraria phaseoloides in forest areas of Côte d'Ivoire
Chromolaena odorata, a wild species, and Pueraria phaseoloides, an introduced species, were compared as fallow plants over 6 and 18 month periods, in a permanent annual sequence with a 4-month maize (Zea mais) cropping cycle. On average, P. phaseoloides restored more N than C. odorata (145 kg ha-1 compared to 87 for 6-month fallows, and 245 kg ha-1 compared to 178 for 18-month fallows). Short-term P. phaseoloides fallows promoted nitrogen mineralization by soil and N uptake (N export from grain maize, restoration via maize mulch). Cropping systems with 18- month live fallowed plant cover were not more productive than the slash-and-burn control with C. odorata cover. After 4 years, organic N supplies in the surface horizon declined for systems with 6-month fallows, and were generally higher with C. odorata cover.
| Main Authors: | , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
XUL
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| Subjects: | F08 - Systèmes et modes de culture, Zea mays, Chromolaena odorata, Pueraria phaseoloides, azote, plante de couverture, minéralisation, système jachère, jachère, http://aims.fao.org/aos/agrovoc/c_8504, http://aims.fao.org/aos/agrovoc/c_24738, http://aims.fao.org/aos/agrovoc/c_6357, http://aims.fao.org/aos/agrovoc/c_5192, http://aims.fao.org/aos/agrovoc/c_1936, http://aims.fao.org/aos/agrovoc/c_15999, http://aims.fao.org/aos/agrovoc/c_2784, http://aims.fao.org/aos/agrovoc/c_34007, http://aims.fao.org/aos/agrovoc/c_4027, |
| Online Access: | http://agritrop.cirad.fr/513173/ |
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