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20192
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Subject: Agronomy × Author: Sandhu, Maninder Singh × Start date: 1960 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Influence of phosphate solubilizing bacteria and inoculation method on phosphorus availability and productivity of transplanted and direct seeded rice-wheat system
    (Punjab Agricultural University, Ludhiana, 2019) Sandhu, Maninder Singh; Deol, J.S.
    The field experiment entitled “Influence of phosphate solubilizing bacteria and inoculation method on phosphorus availability and productivity of transplanted and direct seeded rice-wheat system” was conducted at Students’ Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana over two years during rabi (2015-16 and 2016-17) and kharif (2016 and 2017). The objectives of the investigation were to study the effect of phosphate solubilizing bacteria and method of inoculation on phosphorus availability and the carryover effect of varying phosphorus levels on succeeding crop in transplanted and direct seeded rice-wheat system. The field experiments was carried out on loamy sand soil which was medium in organic carbon, medium in available nitrogen and available potassium, medium in available phosphorus. In transplanted rice-wheat system the highest dose of P fertilizers i.e. P60 treatment was significant in improving growth parameters like plant height, tiller count, DMA, LAI and PAR interception in both transplanted rice and wheat. Higher doses of P increased the available soil P. Application of P60 treatment significantly improved yield parameters like effective tiller count and grains ear-1 in wheat of transplanted rice-wheat system. In transplanted rice the P60 fertilizer treatment significantly affected the effective tiller count. The P60 treatment significantly improved the grain yield, straw yield and harvest index of both transplanted rice and wheat. Higher economic returns and higher B:C were recorded with P60 treatment. The PSB inoculations significantly improved the dry matter accumulation, effective tiller count and grain yield of 2nd year wheat of the transplanted rice-wheat system. Among PSB treatments seed and soil inoculation with Bacillus spp. recorded maximum gross returns, net returns and B:C. For the direct seeded rice-wheat system highest dose of P fertilizers i.e. P60 treatment significantly improved growth parameters like plant height, tiller count, DMA, LAI and PAR interception in both direct seeded rice and wheat. Available soil P increased with higher doses of P fertilizers. The P60 treatment was significant in improving yield parameters like effective tiller count and grains ear-1 in wheat. In direct seeded rice the P fertilizer treatments significantly affected the effective tiller count. The P60 treatment significantly improved the grain yield, straw yield and harvest index of both direct seeded rice and wheat which were statistically at par with P45 treatment. Among phosphorus treatments P60 treatment recorded highest economic returns and higher B:C. The PSB inoculations were non-significant in improving any of growth and yield attributes of both rice and wheat in the direct seeded rice-wheat system. PSB treatment of seed and soil inoculation with Bacillus spp. recorded maximum gross returns, net returns and B:C.
  • Thumbnail Image
    ThesisItemOpen Access
    Influence of phosphate solubilizing bacteria and inoculation method on phosphorus availability and productivity of transplanted and direct seeded rice-wheat system
    (Punjab Agricultural University, Ludhiana, 2019) Sandhu, Maninder Singh; Deol, J.S.
    The field experiment entitled “Influence of phosphate solubilizing bacteria and inoculation method on phosphorus availability and productivity of transplanted and direct seeded rice-wheat system” was conducted at Students’ Research Farm, Department of Agronomy, Punjab Agricultural University, Ludhiana over two years during rabi (2015-16 and 2016-17) and kharif (2016 and 2017). The objectives of the investigation were to study the effect of phosphate solubilizing bacteria and method of inoculation on phosphorus availability and the carryover effect of varying phosphorus levels on succeeding crop in transplanted and direct seeded rice-wheat system. The field experiments was carried out on loamy sand soil which was medium in organic carbon, medium in available nitrogen and available potassium, medium in available phosphorus. In transplanted rice-wheat system the highest dose of P fertilizers i.e. P60 treatment was significant in improving growth parameters like plant height, tiller count, DMA, LAI and PAR interception in both transplanted rice and wheat. Higher doses of P increased the available soil P. Application of P60 treatment significantly improved yield parameters like effective tiller count and grains ear-1 in wheat of transplanted rice-wheat system. In transplanted rice the P60 fertilizer treatment significantly affected the effective tiller count. The P60 treatment significantly improved the grain yield, straw yield and harvest index of both transplanted rice and wheat. Higher economic returns and higher B:C were recorded with P60 treatment. The PSB inoculations significantly improved the dry matter accumulation, effective tiller count and grain yield of 2nd year wheat of the transplanted rice-wheat system. Among PSB treatments seed and soil inoculation with Bacillus spp. recorded maximum gross returns, net returns and B:C. For the direct seeded rice-wheat system highest dose of P fertilizers i.e. P60 treatment significantly improved growth parameters like plant height, tiller count, DMA, LAI and PAR interception in both direct seeded rice and wheat. Available soil P increased with higher doses of P fertilizers. The P60 treatment was significant in improving yield parameters like effective tiller count and grains ear-1 in wheat. In direct seeded rice the P fertilizer treatments significantly affected the effective tiller count. The P60 treatment significantly improved the grain yield, straw yield and harvest index of both direct seeded rice and wheat which were statistically at par with P45 treatment. Among phosphorus treatments P60 treatment recorded highest economic returns and higher B:C. The PSB inoculations were non-significant in improving any of growth and yield attributes of both rice and wheat in the direct seeded rice-wheat system. PSB treatment of seed and soil inoculation with Bacillus spp. recorded maximum gross returns, net returns and B:C.