response of peanut (arachis hypogaea l.) to co-inoculation with bradyrhizobium spp. and phosphate dissolving bacteria under different levels of phosphorus fertilization in sandy soils.

Abstract: Two field trials were conducted at Ismailia Agricultural Research Station during the two successive summer growing seasons of 2005 and 2006 to study the effect of phosphorus levels (0,8,16 and 32 P2O5/fed) and inoculation with Bradyrhizobium spp and phosphate dissolving bacteria (Bacillus megaterium var phosphaticum ) either alone or in combinations on nodulation status (number and dry weight of nodules/plant), growth, nitrogen and phosphorus uptake, yield and its attributes of groundnuts in a sandy soil. Results showed that inoculation with Bradyrhizobium and phosphate dissolving bacteria either solely or in combinations improved nodulation status, growth, N and P uptake, yield and its components. However, dual inoculation with (Bradyrhizobium + phosphate dissolving bacteria) were found to surpass the single inoculation for the aformentioned characters, in both growing seasons.
Increasing phosphorus levels up to 16 and 32 kg P2O5/fed significantly increased each of number and dry weight of nodules, dry matter, N and P uptake, number of pods/plant, pod weight/plant, seed weight/plant, 100-pod weight, 100-seed weight, shelling %, pod yield/fed and crude protein compared with the plants received 8 kg P2O5 /fed and unfertilized treatments.
Moreover, results showed that most of the aforementioned characters increased significantly when the two phosphorus levels (16 and 32 kg P2O5/fed) were added in combinations with mixed inoculation with (Bradyhizobium + phosphate dissolving bacteria) compared to other treatments.
It can be concluded that improvement of peanut yield could be achieved by application of 16 kg P2O5/fed as rockphosphate in addition to inoculation with (Bradyrhizobium + phosphate dissolving bacteria) under sandy soils conditions.
Key words: Nitrogen fixation, Bradyrhizobium spp , peanut, phosphate dissolving bacteria, Bacillus megaterium var phosphaticum, phosphorus fertilization.
Publication year 2007
Availability location معهد بحوث المحاصيل الحقلية 9- شارع الجامعة- الجيزة
Availability number
Organization Name
serial title Bull. of Suez Canal Univ. Appl. Sci.
Author(s) from ARC
Agris Categories Agriculture - General aspects
AGROVOC
TERMS		 Arachis hypogaea. Bacteria. Bradyrhizobium. Phosphates.
Publication Type Journal
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