The series of bi bacterial preparations offers several types of Rhizobia improving cultivation of leguminous plants (both seed and fodder crops). Bi products are extremely concentrated microbial preparations, the only ones available on the market with such an enormous bacteria content per gramme (2-3 x 109, CFU/1g) and, due to its loose form, they are easy to store (shelf life of 12 months) and dose during usage, which makes these products stand out in comparison to other available preparations. Microorganisms present in bi products are carefully hand-picked, highly active and represent high-productive strains used to support leguminous plant cultivation. Symbiotic bacteria contained within bi series preparations coexist with a leguminous plant’s (Fabaceae) root system, supplying them with assimilable nitrogen and other indispensable nutrients. Such plants are characterised with an increased yield and higher resistance to environmentally adverse conditions. With such protection, they are less susceptible to diseases and pests.
Application of preparations containing bi series Rhizobia allows to:
- limit the volume of nitrogen fertilizers
- increase the volume of assimilable nitrogen content in soil for future crops
- strengthen plants – by reducing their susceptibility to diseases and stress conditions during the vegetation period
- achieve a better soil structure
- increase plant yield by up to 10-20%
- increase the protein content in plants (seeds)
- improve the cultivation conditions and the environment
All bacteria offered in bi products are regularly monitored regarding their content and viability.
The preparations are produced in a laboratory conforming to the highest global standards; they are of the highest quality and contain three times more bacteria than some other available preparations.
A particular species or strain of Rhizobium induce a specific emergence of nodules in some plants, hence the symbiosis is a distinct interaction in which a plant host provides genetic information conditioning the emergence of a nodule, whereas a bacterial microsymbiont launches its specific development programme. Moreover, a plant partner controls nodule emergence and development.
A symbiosis between Rhizobia and leguminous plants is possible in low nitrogen conditions. This process entails mutual exchange of specific signals initiating nodulation through activation of distinct plant and bacterial genes.
In response to plant structure and plant defensive mechanisms, bacteria developed a series of counter-strategies. At the same time, the benefits of plant and bacteria symbiosis result in the emergence of infection-facilitating mechanisms. Flavonoids produced by plants play a crucial role in the infection process. They induce positive chemotaxis of compatible (capable of effective symbiosis) Rhizobia. Such compounds are inductors of nod bacterial genes responsible for plant nodulation. Their activation capability depends on a plant species. In case of Rhizobia, they are activated by flavones and flavonons (e.g. luteolin) produced by temperate zone plants (such as clover, Lucerne, vicia, peas), whereas Bradyrhizobia are activated by isoflavones (e.g. daidzein), produced by tropical legumes (such as soya). According to scientific sources, all micro-organisms capable of atmospheric nitrogen reduction (fixing) carry out this process using a complex enzymatic system with nitrogenase, an enzyme directly catalysing nitrogen molecule reduction, playing the most crucial role. What’s interesting is that the global population of leguminous plants fixes approximately 90 million tonnes of nitrogen per year only due to a few kilogrammes of nitrogenase produced by Rhizobium bacteria.