EFFECT OF INTERCROPPING SYSTEMS AND NITROGEN LEVELS ON CERTAIN CHARACTERS OF SNAP BEAN AND PEPPER. III. EFFECT ON COMPETITION PARAMETERS | ||||
| Journal of Plant Production | ||||
| Article 16, Volume 27, Issue 6, June 2002, Page 4031-4043 PDF (3.77 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2002.254914 | ||||
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| Authors | ||||
| Aida M. Abd EI-Rahim,; EI-Sa. L. Fathy; H. M. M. Ghobary; EI-Sa. M. EI-Said | ||||
| Veget. Res. Dept., Agric. Res. Centre, Cairo, Egypt. | ||||
| Abstract | ||||
| The competition parameters measured in order to throw some light advance on the expected yield resulting from the tested treatments. 1. Land equivalent ratio (LER): The land equivalent ratio (LER) of pepper and snap bean showed values more than one in all intercropping systems in both seasons. The highest values for both crops were obtained from the IS3 intercropping system in both seasons. With respect to the nitrogen levels, the data cleared that the highest value was obtained at zero nitrogen level for pepper, snap bean and both crops in both seasons. By increasing nitrogen level, the land equivalent ratio was decreased in both seasons. The effect of interaction on land equivalent ratio of pepper, snap bean and both crops Significantly observed in both seasons. The interaction between IS3 system and zero nitrogen level gave the bestresults of land equivalent ratio of pepper, snap bean and both crops in both seasons. 2. Relative crowding coefficient (RCC): The intercropping systems and nitrogen levels had no effect on this parameter in both seasons. The same trend was obtained by the interaction between intercropping systems and nitrogen levels in both seasons, except relative crowding coefficient of snap bean (Ks) in the second season. 3. Aggressivity (A): The highest aggression value of pepper (Aps) was obtained under the IS4 intercropping system in both seasons. All intercropping systems gave a dominated aggression value for pepper (Aps) in both seasons, however all intercropping systems gave recessive aggreSSion values of snap bean (Asp) in both seasons. Concerning the effect of nitrogen levels, the highest dominant value of aggression in pepper (Aps) was obtained by zero nitrogen level in both seasons. However aggression values of snap bean was negative in both seasons. The superior aggression value of pepper resulted from the interaction between the IS4 system and zero nitrogen level in both seasons, followed by the interaction between the IS3 system and zero nitrogen level in both seasons. 4. Mean of net income: The. highest net income was obtained from the IS3 system, followed by the IS4 system in both seasons, whereas the least net income per feddan was obtained from the ISo system (planting pepper as a solid crop). Nitrogen levels were not significant on net income per feddan. The highest net income per feddan was obtained from zero nitrogen level in both seasons. With respect to the interaction between intercropping systems and nitrogen levels, the obtained results showed that the highest net income per feddan was obtained from the IS3 system with zero nitrogen level in both seasons. However, the least net income per feddan was obtained from the interaction between ISo system and zero nitrogen level in both seasons. | ||||
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