Skystos organinės trąšos biojodžio įtaka ekologiškų bulvių derliui ir kokybei

Pekarskas, Juozas
January 2012
Sodininkyste ir Darzininkyste;2012, Vol. 31 Issue 1/2, p74
The research of the effect of liquid organic fertilizer Biojodis on potato yield and quality was carried out in the Experimental Station of the Lithuanian University of Agriculture on loam, shallowly calcareous gleyic Luvisol--IDg8-k (Calc(ar)i-Epihypogleyic Luvisol--LVg-p-w-cc) in 2005 and 2007. It was found that spraying of potatoes growing at BBCH 21-23 and BBCH 51-53 growth stages with liquid organic fertilizer Biojodis, both in unfertilized and fertilized with potassium fertilizers background, has considerably increased total (2.02 to 2.36 and from 2.38 to 2.59 t ha-1) and marketable (2.39 to 2.59 and from 2.52 to 2.59 t ha-1) yield. The efficiency of Biojodis when potassium fertilizers are applied on potatoes is significantly higher. Biojodis had little influence on dry and soluble solids and vitamin C content in organically grown potato tubers. Under unfertilised with potassium fertilizers background starch content in the potato tubers has essentially increased having applied both the studied 6 and 10 l ha-1 rates of Biojodis, meanwhile, having fertilized potatoes with potassium fertilizer, starch content essentially increased only after applying 10 l ha-1 rate. After spraying of potatoes with Biojodis at 10 l ha-1 rate, fertilized with potassium sulphate K90 rate, a substantial decrease of nitrates was observed in comparison to unfertilized and untreated by Biojodis potatoes.


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