Paper Information

Journal:   AGRICULTURAL SCIENCES AND TECHNOLOGY   2007 , Volume 21 , Number 2 (SPECIAL ISSUE IN HORTICULTURE SCIENCES); Page(s) 91 To 98.
 
Paper: 

THE EFFECT OF TUBER WEIGHT AND VOLUME FOR DIFFERENT SIX VARIETIES OF POTATO AT DIFFERENT PLANTATION DENSITIES

 
 
Author(s):  SOURATI R., SEIDAVI A.R.*, BIZHANNIA A.R., KAMRAN E., GHANIPOOR M.
 
* COLLEGE OF AGRICULTURE, GUILAN UNIVERSITY AND ISLAMIC AZAD TEHRAN UNIVERSITY
 
Abstract: 
a-This experiment was conducted for investigation on yield of different potato varieties in different plantation densities. A split-plot design with completely randomized design (CRD) as basal design was used. The potato varieties including Agria, Picaso, Diamant, Casmos, Marfona and Hertha.
Meanwhile different plantation densities were at density of 4.4 plant per m2 with 75x30 distance between each row and plant, density of 5.3 plant per m2 with 75*25 distance between each row and plant and density of 6.6 plant per m2 with 75x20 distance between each row and plant which respectively put in principal and secondary (inferior, subordinate) plots. Obtained result from 4 harvest stages and final harvest showed that densities and used varieties in each of these 4 harvest stages had significant effect on the length of stolon, wet weight of tubers, amount of tubers, dry weight of tubers, dry weight of airy organs, dry weight of leaves, plant height, amount of principal stems, amount of stolons and the total yield (P<0.01).But plant density and variety had not significant effect on tubers volume (P<0.05). Variety of Picaso in total yield with 43.850 ton per hectare and wet weight of tubers 104.583gr had the highest yield (P<0.05) among total varieties. Density of 25cm for plant (37.046 ton per hectare) and volume of tubers (666.20cc) showed the highest effect between other different densities (P<0.01). Also by increasing of density plant, it was showed that quantity of produced tuber and volume of dry matter in each plant decreased. Results of this experiment showed that the highest yield in all varieties; would obtained when plant is in the maximum growth, but plant must not be picked before completing of these organs growth.
 
Keyword(s): POTATO, VARIETIES, PLANTATION DENSITY, VOLUME VARIATION, WEIGHT VARIATION
 
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