RHIZOBIUM-SOYBEAN SYMBIOSIS AS AFFECTED BY SOURCE AND QUALITY OF WATER USED IN IRRIGATION | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 4, Volume 27, Issue 8, August 2002, Page 5667-5677 PDF (1.35 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2002.255224 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| W.N. Ghobrial; R.Y. Rlzk; Fatma A. Sherif; A.N. Estefanous | ||||
| Solis, water and environ. Res. Institute, ARC, Giza, Egypt | ||||
| Abstract | ||||
| An experiment in cement rough was conducted at Sakha Agric. Res. Station during two successive seasons (2000 and 2001) to explore symbiotic performance of two strains of Bradymizobium japonicum (1577 and 110) used to inoculate soybean cultivar crowford, irrigated with high quality of tap water and low quality of sewage and drainage water or their mixture. Results were recorded after 50 and 90 days from planting time. Effect of inoculation on nodules formation was very clear by soybean plants, irrigated with tap water and inoculated with any of two rhizoblal strains. Strain 1577 achieved higher values of N2-fixation parameters, as well as growth measurement of soybean plants than strain 110. On contrary soybean plants irrigated with sewage or drainage water didn't show any response to inoculation. While a little improvement was observed for soybean plants received a mixture of drainage and tap water, indicating that failure of nodule formation could be attributed to quality of water used in irrigation. Concerning the grain yield and their total N-content, irrigation with tap water gave the highest improvements being 105.57 for the seed yield and 156.92% for nitrogen content over control, while those received sewage and drainage water recorded a very less improvements. In the case of irrigation with sewage water, lower values of grain yield were obtained than the control (·1.71%). For these reasons, the research was directed towards identifying some chemical and biological characteristic of wastewater used in irrigation, which it could be concluded that the failure of Rhizobium-soybean symbiosis is a resultant expression of three interacting factors: high concentration levels of heavy metals, high density of parasltes, microbial pathogens and high amount of nitrogen especially in sewage water. | ||||
| Keywords | ||||
| Bradyrizobium japonicum; drainage water; sewage water; soybean | ||||
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