RESPONSE OF PEANUT TO DIAZOTROPHIC INOCULATION AND N-FERTILIZATION IN SANDY SOILS IN PRESENCE OF NEMATODES-CONTROLLING AGENTS | ||
| Egyptian Journal of Agricultural Research | ||
| Article 1, Volume 78, Issue 1, March 2000, Pages 1-22 PDF (5.9 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2000.321408 | ||
| Authors | ||
| AHMED F. SHAHABY1; AHMED G. RAHAL2; HEBA S. SHEHATA2; MOHAMED FAYEZ3 | ||
| 1Department of Microbiology, College of Agriculture, Cairo University, Giza 12613, Egypt | ||
| 2Agricultural Microbiology Research Department; Soils, Water and Environment Research Institute; ARC; Giza 72613, Egypt | ||
| 3Department of Microbiology, College of Agriculture, Cairo University, Giza 12613, Egypt. | ||
| Abstract | ||
| A field trail w:3 executed in Ismailia sandy soil. Biomass, nodula-tion, N2-fixation and yield of inoculated peanut cv. Giza 5 were moni-tored in presence of N fertilizer and nematodes-controlling agents (mocap and nemaless). Two rhizobial inocula were used, okadin (Single culture of Bradyrhizobium spp.) and rhizbacterin (dual inoculum of Bra-dyrhzobium spp. and Azotobacter chroococcum). Results demonstrated that higher biomass yield (2.44 - 4.95 ton fed-1) was reportd by okadin inoculation against 2.06-2.58 ton fed-1 due to rhizobacterin. Peanuts treated with mocap (synthetic nematicide) and nemaless (bio-product) were higher in biomass than those untreated. Okadin supported higher nodule biomass compared to rhizbacterin whether N fertilization was ap-plied or not, such effect was more pronounced with nematodes-controlling agents-treatd plants. Nematodes-controlling agent supported better nodulation of uninoculated plants where nodule numbers in-creased by 21.3 and 5.6% due to treatment with mocap and nemaless, respectively. Nemaless-treated peanuts beared nodules with a dry weight of 1.42 g plant-1 compared to 1.13 g plant-1 for those supplied with mocap. Rhizobacterin, in absence of N fertilizer, produced the high-est pod yield (1.94 ton fed-1) while the lowest (1.65 ton fed-1) was re-corded by either untreated plants or those fertilized with 45 kg N fed-1. Nemaless-treated peanuts did produce superior pod yield approxmating 23% higher than that due to mocap treatment. Inoculated plants, with rhizobacterin in particular, received no N-fertilizer exhibited higher acet-ylene reducing activity on their roots compared to those simultaneously fertilized with 45 kg li fed-1. Protein and peel yields considerably varied depending upon treatment. | ||
| Keywords | ||
| Nematoda Management; Soil Heath; Fertilizers; Plants | ||
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