بررسی صفات کمی و کیفی ارقام زودرس و دیررس سیب زمینی در کشت بهاره

In order to introducing of new potato varieties two experiments were carried out with 14 late to medium late and 17 early to medium-early varieties. Experimental design was Randomized Complete Siock Design'CRCBD) with 4 replicati~ns. All the varieties were grown in five ,locations (Karaj ; Khorasan, Glestan ,Shahrood, East Azerbaijan, Ardebil) for two years. Each plot was consisted of 2 rows and row length was 6 meters. Plant density was 25x75 . Centimeters, Some of jnvestigated characters:were: tuber shape, tuber size, flesh colour, secondary growth, cooking quality, total and marketable yield. Datas analysis showed that among the late and medium late varieties (Aziza, Eba, cosima, Agria , ElIes,. Bolesta , Picasso , Draga, Diamant, Romano, Kurasm Kardi"nal, Moreny, Hertha) Moren, Picasso and Kuras, arieties were produced more marketable yield than the others. In early and medium early varieties experiment marketable yield of Arind a, Sante, Santina, and Marfona were more than other varieties (Ajax, Estima, Escort, Ilona, Binella, Dita, Concord, Cosmos, Miriam). Final suggestions are as follows: 1-Arinda and sante varieties are suitable for spring cultivation and off season . production. 2-Picasso and moren for ftesh consumptions. 3-Agria for fresh market and processing. 4-Kuras for starch extraction.