Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: January 4, 2005
Publication Date: June 1, 2005
Citation: Cash, L., Jenkins, J.N., McCarty Jr., J.C. 2005. Influence of four plant populations on boll retention and lint yield on four commercial cultivars [abstract]. National Cotton Council Beltwide Cotton Conference. p. 1019. Technical Abstract: With ever increasing costs associated with transgenic cotton, producers would like to maximize yield but minimize the amount of seeds per acre. A study was conducted at the Plant Science Research Center, Mississippi State, MS in 2003 and 2004. Four mid-south commercial cultivars were evaluated at four different plant populations, for boll retention and lint yield. The four cultivars were Deltapine (DP 555 BG/RR), Deltapine (DP 444 BG/RR), Suregrow (SG 215 BG/RR), and Stoneville (ST 4892 BG/RR) and the four plant populations were 3, 6, 9, and 12 inch spacing or 55,023, 27,511, 18,336, and 13,756 plants per acre, respectively. Each plot consisted of four rows planted in a 4 planted/2 row skip. Ten plants from each outside and inside row were mapped after plots were defoliated to determine boll retention. Cotton yields were determined with a mechanical picker; hand weighed in 2003 and weighed using load cells on a customized picker in 2004. In 2003, the solid planted overall mean yields ranged from 1471 lbs/A for DP 555 BG/RR to 1270 lbs/A for DP 444 BG/RR. In 2004, the solid planted overall mean yields ranged from 1174 lbs/A for DP 555 BG/RR to 695 lbs/A for DP 444 BG/RR. In 2003, in the solid planted there was no significant difference between the 3, 6, and 9 inch plant spacings with respect to mean yield. In 2004, in the solid planted the 3 inch plant spacing was significantly higher than the other plant spacings with respect to mean yield.