Izvorni znanstveni članak
EFFECT OF MANY-YEAR NATURAL AND MINERAL FERTILIZATION ON YIELDING AND THE CONTENT OF NITRATES (V) IN POTATO TUBERS
Jolanta JANOWIAK
; Department of Agricultural Chemistry, Faculty of Agriculture, University of Technology and Life Sciences in Bydgoszcz, 85-326 Bydgoszcz, 5 Seminaryjna Str., Poland
Ewa SPYCHAJ-FABISIAK
; Department of Agricultural Chemistry, Faculty of Agriculture, University of Technology and Life Sciences in Bydgoszcz, 85-326 Bydgoszcz, 5 Seminaryjna Str., Poland
Elżbieta WSZELACZYŃSKA
; Department of Plant Material Storage and Processing, Faculty of Agriculture, University of Technology and Life Sciences in Bydgoszcz, 85-326 Bydgoszcz, 5 Seminaryjna Str., Poland
Mieczysława PIŃSKA
; Department of Agricultural Chemistry, Faculty of Agriculture, University of Technology and Life Sciences in Bydgoszcz, 85-326 Bydgoszcz, 5 Seminaryjna Str., Poland
Barbara MURAWSKA
; Department of Agricultural Chemistry, Faculty of Agriculture, University of Technology and Life Sciences in Bydgoszcz, 85-326 Bydgoszcz, 5 Seminaryjna Str., Poland
Sažetak
The present research, carried out based on many-year long-term experiment, aimed at determining yielding, the content of total protein and the content of nitrates (V) in potato tubers as a result of the fertilization applied. There were observed significantly lower tuber yields whenever mineral fertilization only was applied. The varied nitrogen fertilization and combined fertilization with nitrogen and manure significantly modified ‘Bila’ potato tuber yielding.
Significantly highest yield, as much as 49.5 % higher, as compared with the control, was recorded after the application of nitrogen at the dose of 180 kg N·ha–1 with manure. The content of total protein in ‘Bila’ potato tubers ranged from 94 g·kg-1 to109 g·kg-1 and it was significantly determined by the fertilization used. The content of nitrates (V) was determined by the fertilization applied and ranged from 133 to 222 mg·kg-1.
Ključne riječi
potato; fertilization; yield; protein; nitrate(V)
Hrčak ID:
41585
URI
Datum izdavanja:
26.6.2009.
Posjeta: 1.168 *