Effect of NS-nitragin application on soybean yield and yield components

Abstract

Agricultural soils of Serbia are low in soybean symbiotic bacteria and application of bacteriological preparations has been introduced as a regular cultivation practice when growing soybean. A trial was set up on experimental field of Institute of Field and Vegetable Crops from Novi Sad on chernozem soil using a randomized block design with four replicates. Mineral nitrogen fertilizers were used in rates of 0, 30, 60, and 90 kg ha-1 in the experiment. Each of the nitrogen treatments had two variations, with and without inoculation. The effects of inoculation and different nitrogen fertilizer rates on yield and yield components were determined based on the pod number, seed number, 1000 seed mass and protein and oil content in seeds. Significantly higher pod number was observed in inoculated plants with the application of 30 kg N ha-1. Inoculation with NS-Nitragin increased seed number per plant. In treatment with no mineral nitrogen applied and with application of 30 kg N ha-1 and 60 kg N ha-1, 1000 seed mass was statistically higher in inoculated plants than in uninoculated ones. Inoculation produced statistically significant difference in soybean yield only in the treatment with no mineral nitrogen applied. Inoculation and applied mineral nitrogen rates had no significant effect on protein content in soybean grain.

U poljoprivrednim zemljištima Srbije brojnost simbiotskih bakterija soje je mala, a primena bakterioloških preparata uvedena je kao redovna mera pri gajenju soje. Ogled je postavljen na oglednom polju Instituta za ratarstvo i povrtarstvo u Novom Sadu, na zemljištu tipa černozem po slučajnom blok sistemu u četiri ponavljanja. U eksperimentu su primenjena mineralna azotna đubriva u količinama 0 kg ha-1, 30 kg ha-1, 60 kg ha-1 i 90 kg ha-1. Ogled je postavljen u dve varijante: sa inokulacijom i bez inokulacije. Uticaj inokulacije i mineralnih azotnih đubriva na prinos i parametre prinosa određen je preko broja mahuna, broja zrna, mase 1000 zrna i sadržaja proteina i ulja u zrnu. Statistički značajno veći broj mahuna na inokulisanoj varijanti u odnosu na neinokulisanu zabeležen je uz primenu 30 kg N ha-1. Inokulacija NS-Nitraginom pozitivno je uticala na povećanje broja zrna po biljci. Na varijanti bez primene mineralnog azota i uz primenu 30 kg N ha-1 i 60 kg N ha-1 masa 1000 zrna kod inokulisanih biljaka bila je statistički veća u odnosu na masu zrna kod neinokulisanih biljaka. Inokulacijom je ostvarena statistički značajna razlika u prinosu samo na varijanti gde nije primenjen mineralni azot. Inokulacija i primenjene doze mineralnog azota nisu značajno uticali na sadržaj proteina u zrnu soje.