Abo El-Khair, A., Mohamed, A., Abd El-Aal, A. (2009). THE ROLE OF BIOFERTILIZIERS IN THE AVAILABILITY OF POTASSIUM FOR POTATO CROP. Journal of Agricultural Chemistry and Biotechnology, 34(5), 4315-4328. doi: 10.21608/jacb.2009.93109
Amal W. Abo El-Khair; A. A. A. Mohamed; Azza A. M. Abd El-Aal. "THE ROLE OF BIOFERTILIZIERS IN THE AVAILABILITY OF POTASSIUM FOR POTATO CROP". Journal of Agricultural Chemistry and Biotechnology, 34, 5, 2009, 4315-4328. doi: 10.21608/jacb.2009.93109
Abo El-Khair, A., Mohamed, A., Abd El-Aal, A. (2009). 'THE ROLE OF BIOFERTILIZIERS IN THE AVAILABILITY OF POTASSIUM FOR POTATO CROP', Journal of Agricultural Chemistry and Biotechnology, 34(5), pp. 4315-4328. doi: 10.21608/jacb.2009.93109
Abo El-Khair, A., Mohamed, A., Abd El-Aal, A. THE ROLE OF BIOFERTILIZIERS IN THE AVAILABILITY OF POTASSIUM FOR POTATO CROP. Journal of Agricultural Chemistry and Biotechnology, 2009; 34(5): 4315-4328. doi: 10.21608/jacb.2009.93109
THE ROLE OF BIOFERTILIZIERS IN THE AVAILABILITY OF POTASSIUM FOR POTATO CROP
Soils, Water and Environ. Res. Inst. Agric. Res. Center (ARC), Giza, Egypt
Abstract
A field experiment was conducted at EL- Kassassien Agric. Res. Station (ARC), EL- Ismaielia Governorate in the winter season of 2007 / 2008, to study the effect of inoculation with either Bacilluscirculans (Silicate (potassium) dissolving bacteria or cyanobacteria (nitrogen fixers and plant growth promoters) on the availability of potassium from both potassium sulfate (48 % K2O) and feldspar (10.5% K2O) as a natural source of potassium to potato plants, as wall as, to investigate their effect on potato yield and its characters and soil available N, P and K contents after potato harvesting and soil biological activities. Results indicated that inoculation with B. circulans and/or cyanobacteria (biofertilizers) in the presence of different potassium sources increased all examined potato tuber yield, tuber content of carbohydrate and soluble sugar, soil biological activity and soil available N, P and K compared to the sole use of K- sources. The dual inoculation with bacteria and cyanobacteria in combination with both K-sources at both tested levels surpassed all the tested treatments and gave the highest potato tuber yield with priority of K- sulfate source than K- feldspar source. However, the use of potassium (K-rock) minerals in combination with biofertilizers may be agronomically more useful and environmentally more feasible than soluble K.