Soya (Glycine max (L.) Merr.) is the most widespread and economically important legume in the world. Used as a protein animal feed it is used in livestock farming, oil and fibre production. In time of growth and development it stores nitrogen from the air in tubers on it’s roots, it gets the nitrogen from help of the Nitrifying bacteria Rhizobium japonicum and Bradyrhizobium japonicum. The research discusses yield and quality parameters of the soy seeds in connection of zeolites and inoculation. Zeolite is a stoneware of volcanic origin, which is formed from silicon, aluminium and oxygen. We use it in farming mostly for it’s good exchanging capacity of N, K, Ca and Mg ions, and for their inflection of ions and heavy metals, so that they are inaccessible to plants. In field tests at the Biotehnical Faculty of Ljubljana we used the“NS Favorit” species and we inoculated the seed with fresh “Nitragin” inoculant. We realized that inoculation of seed greatly affects the development of number of nodules. The biggest yield of 5328kg/ha at 9-percent humidity reached treatment with the use of inoculated seed of soy with added 5000kg/ha zeolite to the ground. The difference between inoculated and un-inoculated seed shown us a 40,4-percent difference in yield size of the seed. We have certified the effect of inoculation on the bigger part of raw protein in the grain. The additive of zeolite ministrates to a bigger share of raw protein, in which there is a smaller share of raw fat. On the content of raw fiber and ash inoculation and zeolite did not hold an important effect.
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