Influences of meteorological factors on the growth and development rule of early maturing machine-picked cotton Xinluzao No.51

This paper analyzed the regularity of organogenesis of early maturing machine-picked cotton Xinluzao No.51 and the effects by meteorological factors，to provide effective theoretical support for the development of machine-picked cotton industry according to local conditions. 10 consecutive growing cotton plants were selected after emergence，the plant height，occurrence and shedding of leaves and buds were investigated in the whole growth period. The results showed that the leaf emergence velocity of Xinluzao No.51 was significantly affected by the temperature and sunshine duration in the process of true leaf formation；expanding speed of the third leaf was the slowest；there were no significant differences in the fourth to tenth leaves，leaf emergence velocity steady increased 15 leaves later. The plant height showed a slow-fast-slow growth process with the increase of leaf age，and the growth of plant height was quadratic curve during the period of flat growth. The middle and lower boll rate of the species was high and in the first fruit section，the boll forming was stable.