Utjecaj pripravka tekućeg pilećeg stajnjaka na zdravlje tla i agrokemijska svojstva tla

The aim of this study was to determine the influence of liquid chicken manure preparation on nematode biodiversity as an indicator of soil health and agrochemi-cal soil properties. The field experiment was conducted during two years into two treatments and three samplings per year. One plot was treated with liquid chicken manure preparation (LCMP) while the other plot, without manure application, was control (C). In the first year of this study, the treatments were conducted in the wheat plantation, while in the following year the culture was rapeseed. Results indicate that genus biodiversity was significantly higher in treatments with LCMP (18% in wheat, 28% in rapeseed). Indices of disturbance (MI, MI [2-5], PPI/MI) show statistically significant differences during the two years indicating ecosys-tem stability, reduction of plant parasitic nematodes and the multitude of beneficial nematodes in treatment with LCMP compared to C. The analysed agrochemical properties showed the increasement of organic matter content (60%) and P and K content in treatment with LCMP compared to C. It can be concluded that the use of LCMP significantly increases the nematode diversity and the stability of the soil ecosystem as well as a nutrient content in the soil which results in a reduced eco-nomic investment, primarily in the use of mineral fertilizers.Cilj ovog istraživanja bio je utvrditi utjecaj preparata na bazi tekućega pilećega stajnjaka na biološku raznolikost nematoda kao pokazatelja zdravlja tla i agrokemijska svojstva tla. Pokus na terenu proveden je kroz dvije godine u dva tretmana i tri uzorkovanja godišnje. Jedna parcela tretirana je preparatima na bazi tekućega pilećega stajnjaka (LCMP), dok je druga bila kontrolna (C). U prvoj godini na pokusnim parcelicama bila je zasijana pšenica, a u drugoj uljana repica. Rezultati pokazuju da je bioraznolikost rodova bila značajno brojnija u tretmanima s LCMP-om (18% pšenica, 28% uljana repica). Indeksi uznemirenja (MI, MI[2-5], PPI/MI) pokazuju statistički značajne razlike kroz dvije godine te upućuju na stabilnost ekosustava, smanjenje fitoparazitskih nematoda i mnoštvo korisnih nematoda u LCMP tretmanu usporedno s kontrolom. Analizirana agrokemijska svojstva ukazuju na povećanje organske tvari za 60%, kao i sadržaja P i K u tlu u tretmanu s LCMP-om usporedno s kontrolom. Može se zaključiti da upotreba LCMP-a značajno povećava biološku raznolikost nematoda u tlu te stabilnost ekosustava, kao sadržaj hranjivih tvari u tlu, što za posljedicu ima smanjena ekonomska ulaganja, prvenstveno u upotrebi mineralnih gnojiva