Determination of nitrogen efficiency by half-high blueberry cultivar ‘Chippewa’
2015
Apse, J., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Soil and Plant Sciences | Karklins, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Soil and Plant Sciences | Osvalde, A., University of Latvia, Salaspils (Latvia). Inst. of Biology. Lab. of Plant Mineral Nutrition
Nitrogen management is quite complicated due to it mobility, transformations, vegetative growth and reproductive development, berry biochemical content etc. The nitrogen management for blueberries was chosen as a main topic for experiment set up in Valmiera district in 2012 where plantation was established 2 years ago. Experimental plots with blueberry cultivar ‘Chippewa’ were arranged on gently slope. Original topsoil’s reaction was pH KCl 6.41, organic matter content 20 g kgE-1. Five experimental plots each of them consisting from 8 bushes was set up. Soil reaction was determined potentiometrically, organic matter in mineral soil according to the Tyurin’s method, in organic materials – by dry combustion, total nitrogen using Kjeldahl method. Samples of leaves from each experimental plot were taken during the vegetation for NPK and Fe, Mn, B nutrition diagnosis. Research showed that different nitrogen fertiliser applications significantly influenced Mn concentration in the leaves; however the impact on yield was not significant.
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