泰国农业论文《泰国玉米群体生物学和农艺学特性研究初报》

74 d, group percentile, Q4 is prevented, Q8, Q9, Q10 and Q13 tasseling late; Q7 group, and Q12 Q11 powder shortest period for 75 d, group Q8, Q9, Q10 and Q13 the longest for 79 d; 12 groups are in after tasseling 1 ~ 2 d began before changing, powder in 1 ~ 2 d secretions after start; Q6 group, spins a loose powder, wide earlier, and growth period the longest for 120 d, for late cooked group, and group, Q7 Q11 and spins a wide, loose powder, earlier, and growth period is longer, are 118 d, late ripe; Q9 groups are, powder, tasseling the late, but growth period the shortest for 116 d, for the most precocious groups. From the growth period to see, group the 25 th, Q2, Q4 is prevented, Q9 and Q12 more early maturity, growth period for 116 d, groups and more moderate Q5 Q6, growth period for 120 d. Further to the group production and development stages of the correlation analysis, its related coefficient were not significant, but output and filling stage and negatively correlated to the whole growth period, this with previous temperate maize as research materials provided the results are different and needs to be further validation.

2.2 December Thailand maize population plant trait
From the table 2, it is known that the 12 groups are flatten plant type, plant height 219.15 ~ 234.06 cm, of which the highest (234.06 cm group Q10, group for 219.15 cm lowest Q7, plant height were lower than that of the check varieties zhengda 619 http://www.51lunwen.org/ny/2012/0228/lw201202280953153588.html (246.35 cm); Spike a high 96.87 ~ 128.84 cm, minimum, the highest for the colony Q11 Q5, respectively; Leaf number are in about 20 tablets, in the ear leaf number are in about seven piece; The male spike length 54.17 ~ 58.93 cm, Q4 is prevented the longest, the 25 th the shortest; Level 1 branches in the range of 10.57 ~ 14.93, the 25 th the most, Q11 at least; Level 2 branches of Q6 for a maximum of 2.30, and at least 1.30 Q10 treatment.
2.3 December corn yield characters of Thailand group compared
From the table 3, it is known that the 12 Thailand maize population output than controls varieties, including the 25 th group the highest yield of 7463.01 kg/ha, followed by group Q2, yield of 7220.01 kg/ha, group Q12 yield for the lowest 6418.31 kg/ha; The results of variance analysis showed that group the 25 th, Q2, percentile, Q4 is prevented, Q7, Q8, Q6, between the Q9 yield difference was not significant.