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The Growth Analysis of Sowing Times in Safflower(Carthamus tinctorius L.)  

Kim, Jae-Cheol (Gyeongbuk Agricultural Research and Extension Services)
Ryu, Jung-Gi (Gyeongbuk Agricultural Research and Extension Services)
Kim, San-Young (Institute of Natural Product Gyeongbuk ARES)
Park, Kyeng-Seok (Institute of Natural Product Gyeongbuk ARES)
Publication Information
Korean Journal of Plant Resources / v.21, no.1, 2008 , pp. 47-51 More about this Journal
Abstract
This study was carried out to get the basic data for safflower cultivation according to sowing date by growth analysis for 2 years form 2003 to 2004 at Institute of natural product in Uiseong, G.B.A.R.E.S.. Safflower(Cheongsoo cultivar) was seeded at March 1st, April 1st, May 1st, and July 1st in field. The necessary date for germination was 24 days, when safflower was seeded at March 1st, but it was 8 days which sowed at April 1st and when the seed was sowed at high temperature period, the necessary date for germination was getting short. The necessary date for flowering was the same trend as germination; it took 104 days at March 1st, 79 days at April 1st, 65 days at May 1st, and 58 days at July 1st sowing treatment. The safflower growth was the most vigor when it was sowed at March 1st. T/R(Top/Root) ratio was gently increased during growing season, but when the seed was sowed at July 1 st, it was low compare to sowing at March 1st and April 1st. RGR(Relative growth rate) was the highest during shoot growth stage, but it was rapidly decreased after flowering. CGR(Crop growth rate) was increased at branching stage, and the increasing velocity was slightly decreased just before flowering, and it was increased again at flowering and at this stage, CGR was the highest, and then it did not increased. NAR(Net assimilation rate) was the highest at shoot growth stage during growing season, and was the highest which was sowed at March 1st.
Keywords
Safflower; Growth analysis;
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  • Reference
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