Abstract
Under field conditions, wheat response to organic amendments and B. megatherium inoculation as well as different rates of natural rock P fertilizer (NRP) was traced. Animal manure, peanut straw and quail feces were added in combination with P-0, P-50 and P-100 kg ha(-1) levels and both factors were tested with or without bacterial inoculation. The grain yield of wheat was higher with 192 kg ha(-1) than rate 96 kg ha(-1) while both of them surpassed the un-fertilized control. Inoculated plants, under all NRP levels, resulted in a higher grain yield than the un-inoculated ones. In inoculated plants, grain yield was significantly higher with quail feces additives than animal manure and peanut residues. B. megatherium induced slight increases in N uptake as compared to the un-inoculated plants. However, peanut residues resulted in N uptake values slightly higher than either quail feces or animal manure. Increasing rock-P levels increased N uptake over the unfertilized or those received 96 kg ha(-1) treatments. Supply with quail feces had increased P uptake over those resulted from peanut residues and animal manure. Quail feces resulted in a relative increase of P uptake by about 5% and 15%; 16% and 19%; 17% and 4% over peanut and animal manure for P-0, P-50 and P-100, respectively. Inoculation with B. megatherium had, to some extent, enhanced K uptake by grains comparable to the un-inoculated one when plants treated with peanut residues. Nitrogen portion derived from (Ndforg) peanut straw and quail feces to inoculated plants was relatively increased, on mean average basis, by about 19% and 16%, respectively over the un-inoculated plants. Efficient use of N derived from peanut straw, quail feces (Org-NUE %) and urea-NUE% by inoculated plants slightly increased under all rock-P levels over those of the un-inoculated plants.