ISSN 1392-3196 / e-ISSN 2335-8947
Zemdirbyste-Agriculture, vol. 104, No. 3 (2017), p. 203–208
Effect of fertilizers with different chemical composition on crop yield, nitrogen uptake and leaching in a sandy loam Luvisol
Liudmila TRIPOLSKAJA, Almantas RAZUKAS, Gvidas SIDLAUSKAS, Ingrida VERBYLIENE
New forms of mineral fertilizers containing bioactive components or substances controlling dissolution of granules in the soil are being developed to increase their efficiency and decrease negative environmental impacts. The present study was aimed to compare the effects of different complex fertilizers and complex fertilizer containing a nitrification inhibitor DMPP (3,4-dimethylpyrazole-phosphate) on barley and potato yield and quality, and nitrogen leaching. Experiments were carried out at Vokė Branch of the Lithuanian Research Centre for Agriculture and Forestry during 2012–2016. Experiments were performed in lysimetric facilities on a sandy loam Luvisol (LV) with a surface area of 1.75 m2 and a test soil layer of 0.60 m thickness. Experimental treatments: 1) granular simple NPK fertilizers, 2) complex fertilizer nitrogenphosphate NP 33:3, 3) complex NPK fertilizer with bioactive components Eurofertil 35 and 4) complex NPK fertilizer with a nitrification inhibitor NovaTec classic. The investigated simple NPK and complex fertilizers (nitrogenphosphate NP 33:3, Eurofertil 35 and NovaTec classic) had a similar effect on the grain yield of barley, but significantly increased (7.7%, P < 0.05) the tuber yield of potatoes. Application of the fertilizer with a nitrification inhibitor improved the quality of barley grain and potato tubers and lowered the concentration of nitrates in tubers. Compared with simple fertilizers (ammonium nitrate, granular superphosphate and potassium chloride), the application of complex fertilizers nitrogenphosphate NP 33:3, Eurofertil 35, containing bioactive substances, and NovaTec classic, supplemented with a nitrification inhibitor, affected the dynamics of nitrogen leaching during specific periods, but no significant changes were estimated for nitrogen leaching per hydrological year.
Key words: leaching, mineral fertilizer, nitrification inhibitor, nitrogen.
Full text: 104_3_str26.pdf