Studies on the efficacy of a phytohormone producing phosphate solubilizingBacillus firmus in augmenting paddy yield in acid soils of Nagaland

Abstract

Summary A super strain of Bacillusfirmus (NCIM-2636) producing a phytohormone, indole-3-acetic acid, in addition to its high ability to solubilize insoluble inorganic phosphates were applied in acid soils of Nagaland, India. Rice (Oryza sativa L.) variety Jaya and IR-8 were grown in kharif season in two successive years 1980 and 1981. After proper manuring the soils received single super phosphate (S.S.P.) and Mussoorie Rock phosphate (R.P.) separately at different doses. Yield of crop in both the years increased significantly due to bacterial inoculation. Maximum grain yield was recorded in Jaya variety under S.S.P. and R.P. when treatments were at the dose of 43.75 and 17.5 kg P ha-1 respectively while the same in IR-8 variety under S.S.P. and R.P. treatments were at the dose of 35 and 17.5 kg P ha-1 respectively. Maximum straw yield was produced by Jaya variety when 35 and 43.75 kg P ha-1 in the form of S.S.P. and R.P. respectively were applied. Highest straw yield of IR-8 variety was obtained after the application of 17.5 kg P ha-1 (S.S.P. and R.P.) in combination with phosphate solubilizing bacteria. Bacterial inoculation decreased the phosphorus availability in 1 st year but increased the same in 2nd year. Phosphorus content in grains was significantly enhanced in both the trials. Maximum uptake of phosphorus by grains was noted in Jaya variety at the dose of 47.5 kg P ha-1 and in IR-8 variety at the dose of 52.5 kg P ha-1 under S.S.P. treatment, while 8.75 and 35 kg P ha-1 in the form of R.P. yielded similar results in Jaya and IR-8 varieties respectively. Phosphorus at the dose of 35 kg ha-~ was found to cause more P-uptake by straw in both S.S.P. and R.P. treatments. The various data from the experiment conclusively proved that the bacterium in combination with R.P. produced the desired effect more prominently than when bacterium applied in combination with S.S.P.

Role of potassium solublizing bacteria on nutrients uptake in red bean (Phaseolus vulgaris L. cv. Goli) under water deficit condition

“…Phosphorus solubilizing bacteria and silicate bacteria play a important role in plant nutrition through the increase in P and K uptake by plant (Datta et al, 1982;Nyanikova et al, 2002;Neelamet et al (2016). Han and Lee (2006) found that the coinoculation of PSB and KSB in combination with direct application of rock P and K materials into the soil increased in N, P and K uptake, photosynthesis and the yield of eggplant grown on P and K limited soil.…”

Phosphate and Potassium Solubilizing Bacteria from Weathered Materials of denatured Rock Mountain, Ha Tien, Kien Giang Province, Vietnam

“…P solubilizing bacteria and silicate bacteria play an important role in plant nutrition through the increase in P and K uptake by the plant [3]. Application of Phosphate solubilizing microorganisms have been used as P-biofertilizer for crop cultivation [11] [12]. Silcate bacteria provided less polluting and less energy-consuming approaches [13] widely used in improvement of available K for assimilation by plants, and removal of impurities from minerals [14].…”

Co-inoculation of Liquid Microbial Cultures and Compatibility with Chemicals for Improvement of Seed Germination and Vigour in Paddy

“…It can be improved by many ways, of which the pre-sowing seed management technique plays a vital role. Among the pre-sowing seed management techniques, the seed treatment with the biofertilizers is one of the important method by which the yield can be improved by 5 to 30 per cent (Datta et al, 1982). Use of these effective microorganisms as a presowing seed treating agent is considered to be ecologically sound and beneficial to both seed and environment.…”