The effect of drying or removal of vegetative growth and cut irrigation and treatment in Oltgviva . Solanun tuberosum L. 3: Some of the qualities of the Treasury potato tubers

Abstract

The study were conducted at spring season , using potato tuber Solanum tuberosumL. var. Desiree . This potato tuber was planted after initiative processing andmechanical separated infection and damage Tubers on label ( 4.5 x 1.6 m ) .Thisexperiment included eight treatments combined with removal vegetative growth andstop irrigation when pulling tubers as follows :-1- Handling removal of vegetative growth with stopping irrigation before 22 days.from harvesting .2- Handling removal of vegetative growth before 22 days with stopping irrigationbefore 11 days from harvesting .3- Handling removal of vegetative growth before 22 days with stopping irrigationbefore 6 days from harvesting.4- Dry out of vegetative growth by using Gramoxsone herbicide and stoppingirrigation before 22 days from harvesting .5- Dry out of vegetative growth by using Gramoxsone herbicide before 22 days withstopping irrigation before 11 days from harvesting .*Assist. Prof. - College of Agriculture – Univ. of Diyala – Republic of Iraq . drsab55@yahoo.com**Assist. Prof. - College of Agriculture – Univ. of Diyala – Republic of Iraq .***Assist. Prof. - College of Agriculture – Univ. of Anbar – Republic of Iraq .2013 الحمداني و آخرون ، 514 - 500 : ( 2 ) مجلة ديالى للعلوم الزراعية ، 55146- Dry out of vegetative growth by using Gramoxsone herbicide before 22 days withstopping irrigation before 6 days from harvesting.7- Dry out of vegetative growth by using basta substance before 17 days withstopping irrigation before 6 days from harvesting .8- Leaving vegetative growth with out removing with stopping irrigation before 6days from harvesting .The measurements of quality characteristics were conducted after tuber pulling,and then divided in to two groups ( for 8 field treatments) which weight 5 kg fromeach part stored in net plastic bags .The first part stored in cool immediately with out dry out treatment ( curing) in 0 ±4 ◦C and humidity 85 ±5 % , Whereas the second part of treatments take For bothparts to cool e place which dry out treatment in 10 – 15 ºC and Humidity 80 – 85 %for 15 days , then transported for both parts to cool store for three months , thentransported to reconditioning ( represent marketing state) in( 31- 35 ºc) and Humidity( 46-53 %) for ten days , therefor the study included 16 treatment , distributed infactorial experimental in three replicates according to R.C,B,D. design, means werecompared according to L.S.D. test with 5% significant level . The results shows thatfield treatment Significant effect in stored characteristics under study . Whereas dryout treatment for vegetative growth in basta before 17 days with stop irrigation beforesix days from time of pulling out of tubers were superiority and increased thepercentage for each dry matter and carbohydrates and starch as well as increased ofquality density of tubers. Treatment of removal of vegetative growth by hand andstopping irrigation before 22 days from pulling out of tubers resulted to increasetubers hardness whereas the treatment of leaving vegetative growth with stoppingirrigation before six days lead to increase the percentage of T.S.S. When investigatedthe effect of treatments by dry out (curing) in the end of storage , found the superiorityof with out dry out lost, increased the hardness of tubers percentage of dry matter,carbohydrate ,starch and quality density and T.S.S.