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Nitrogen and potassium available to plants from vermiculite saturated with pig slurry
Grčman, Helena ; Kadunc, Vinko ; Lobnik, Franc, 1942-
V predstavljenem delu smo testirali ruski ekspandirani vermikulit, saturiran s prašičjo gnojevko, kot gnojilo, ki počasi sprošča hranila. Saturirani vermikulit je vseboval 0.84 % N in 0.85 % K, ...dodali smo ga v dveh odmerkih (30 in 60 vol % ). Lončni poskus v delno kontroliranih razmerah je trajal od začetka marca do konca septembra 1992. Testna rastlina je bila mnogocvetna ljuljka. S saturiranim vermikulitom smo dosegli bistveno večje pridelke kot z mineralnimi gnojili. V omenjenem času se je iz saturiranega vermikulita izkoristilo 90.1ǂ% dušika in 75.5 %kalija pri odmerku 30 vol. % in 76.5 % dušika in 59.5 % kalija pri odmerku 60 vol. %. V poskusnih rastlinah smo izmerili povečane koncentracije nitratov.
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