在目前的研究中,耐盐植物生长促进细菌(ST-PGPR)在突出的植物生长促进(PGP)和胁迫耐受性特性的基础上选择了假单胞菌KSS-6作为生物接种剂,以提高水稻的产量在盐渍土壤中生长。ST-PGPRKSS-6能够将PGP性状保持在高达200mMNaCl,然而,较高的盐胁迫条件会影响这些活动。该研究旨在确定使用KSS-6和有机肥(OM)开发的基于滑石的生物制剂在盐碱条件下对稻田生长和产量的影响。还进行了生物制剂广播以检查对土壤性质的影响。研究发现,组合处理对盐碱条件下水稻的生长和产量表现出积极的影响。KSS-6与OM的联合应用显示出最大的增长增量,叶绿素含量,植物鲜重,和与未处理的对照植物相比的干重。此外,组合处理提高了营养成分(P,K,Zn,Fe,Mg,和Mn)增加了35%以上,并增强了脯氨酸等生化参数,黄酮类化合物,碳水化合物,蛋白质,膳食纤维,米粒的抗氧化剂含量超过32%。土壤参数,包括pH和电导率(EC),水分含量,总有机碳,OM,钠,和氯离子也在处理后得到改善。当施用OM和细菌的组合时,EC从7.43dS/m显著降低至4.3dS/m。这些发现表明,以生物接种剂的形式应用KSS-6可能是一种有希望的策略,可以减轻盐胁迫的负面影响,并提高在退化和盐渍土壤中种植的水稻的产量和营养特性。
In the current study salt tolerant-plant growth-promoting rhizobacteria (ST-PGPR) Pseudomonas atacamensis KSS-6, selected on the basis of prominent plant growth-promoting (PGP) and stress tolerance properties was tested as bioinoculant to improve yield of rice grown in saline soil. The ST-PGPR KSS-6 was capable of maintaining the PGP traits up to 200 mM NaCl, however, higher salt stress conditions affected these activities. The study was designed to determine the effect of developed talc-based bioformulation using KSS-6 along with organic manure (OM) on growth and yield of paddy under saline conditions. Bioformulation broadcasting was also done to examine the effect on soil properties. It was found that the combinatorial treatment showed positive impact on growth and yield of rice under saline conditions. Co-application of KSS-6 with OM showed maximum increment in growth, chlorophyll content, plant fresh weight, and dry weight as compared to untreated control plants. Furthermore, the combinatorial treatment improved the nutrient content (P, K, Zn, Fe, Mg, and Mn) by more than 35% and enhanced the biochemical parameters such as proline, flavonoids, carbohydrates, protein, dietary fiber, and antioxidant content of rice grains by more than 32%. Soil parameters including pH and electrical conductivity (EC), moisture content, total organic carbon, OM, sodium, and chloride ions were also improved upon treatment. There was significant lowering of EC from 7.43 to 4.3 dS/m when combination of OM and bacteria were applied. These findings suggest that the application of KSS-6 in the form of bioinoculant could be a promising strategy to mitigate negative impacts of salt stress and enhance the yield and nutritional properties of rice grown in degraded and saline soil.