A STUDY OF POTATO TUBER QUALITY ACCORDING TO DIFFERENT TYPES OF CULTIVARS

Results of research and experience in manufacturing have shown that potato yields can be high just by knowing ecology and biological requirements in accordance with the application of advanced breeding techniques. This is why a study is made during potato vegetation period in 2013. Research has been conducted in two agro-climatic regions of Kosovo; in research farm of Kosovo Institute of Agriculture (Dukagjinit Plain) and in Pestova (Kosovo Plain). Number of cultivars in the experiments was 11, in four repetitions, according to a randomized system (Fisher blocks). Seed class A imported from Netherlands is used for planting. The research involved potato cultivars for fresh consumption and industrial processing which belong to different vegetation periods. From planting to harvest all cultivars are treated in the same way. Research is conducted in two levels: 1. Field research; the vegetative period of cultivars, the number of stalks, plant height and yield is specified in plots and 2. Laboratory research; after harvesting dry matter is determined for 5 kg samples taken for each treatment (measurement is made with analytical scale PR, type METTELER TOLEDO LC-P 43 with European standards. Protein, starch and cellulose are measured through scans method infrared ray based on standard NIR ISO 12009:2010. All parameters were analyzed by using MSTATC statistical program (MSTAT-C 1990). Treatment means were compared by least significant difference (LSD) the level 5% probability (Gomez Gomez, 1984).