Abstract:

Through selecting and identifying new strains and varieties of early-maturing machine-picked cotton, the quality and yield of machine-picked cotton can be improved steadily. In 2019 and 2020, 12 machine-picked cotton varieties were selected to carry out the comparative experiment of agronomic characters in the experimental area set up by the Institute of Agricultural Sciences of 7th Division of The Xinjiang Production and Construction Corps. The results showed that the shortest growth period of ‘Shidamian268’, ‘H1537’, ‘Jinken1861’ and ‘XinshiK33’ was less than 120 days, and there were 10 varieties with the first boll height ≥18.0 cm, the uniformity of boll-opening period was 2 or 3 grades. ‘Shidamian268’ranked the first in comprehensive mechanical-harvested properties, and the yield of seed cotton, lint cotton and lint cotton before frost were all better than other varieties, which increased by 7.2%, 19.2% and 25.1% respectively compared with the control varieties. The next was ‘Xinnongzao129’, the yield of seed cotton, lint cotton and lint cotton before frost increased by 6.0%, 14.7% and 16.3% respectively compared with the control varieties. ‘Shidamian268’ and ‘Xinnongzao129’ had the best mechanical-harvested properties and cotton quality, which accorded with the requirements of this research area.

Key words: early matured machine-harvested cotton, variety screening, machine-harvested properties, agronomic characters