干播湿出模式下不同灌水量和灌水频次对棉苗生长及产量的影响

打开文本图片集

中图分类号：S562 文献标识号：A 文章编号：1001-4942（2025）07-0053-07

AbstractIn order to screen the suitable irigation amount and frequency for cotton seedling emergence under dry sowing and wet emergence mode，‘Tahe 2∘ was used as the test variety，and a completely randomized experimental design was adopted. Five treatments [WP1：225m3/hm2 ; WP2： 375m3/hm2 ; WP3： 450 （204 m3/hm2 ; WP4： （ 225+150 ） m3/hm2 ； WP5： （ 225+225 ） m3/hm2 ] were set to study their effects on cotton seedling emergence rate，root and plant growth during seedling period，yield and soil temperature.The results showed that split irigation increased the coton seedling emergence rate compared to single irigation，and that of WP4 treatment was 7.73% higher than that of WP2 treatment reaching significant level. Under split irrigation conditions，irigation amount significantly affected cotton seedling emergence rate，plant height and root growth，and WP4 treatment had higher sedling emergence rate and plant height compared to WP5 treatment by 6.41% and 29.68% ，respectively. WP4 treatment had significantly higher root length，root volume，root surface area，projected area of root and tip number than WP5 treatment by 95.95% ， 68.75% ， 83.82% ， 83.94% （204号 and 150.75% ，respectively，and the root diameter was lower by 23.53% reaching significant level. WP4 treatment increased the average soil temperature and effective heat accumulation in the 0～5 -cm and 5～10-cm soil layers compared to WP5 treatment. WP4 treatment had significantly higher seed coton yield than WP2 and WP5 treatments by 14.84% and 6.13% ，respectively. In summary，split irrigation at 375 （ 225+150 ） m3/hm2 （20 was a suitable water-saving and effcient mode for cotton seedling emergence mode under dry sowing and wet emergence mode in southern Xinjiang，which could provide theoretical basis for regulating drop irigation.

KeywordsDry sowing and wet emergence； Cottn； Irigation； Seedling emergence rate； seedlinggrowth; Yield

棉花是我国重要的经济作物[1]，是纺织工业的重要原料，在国民经济发展中具有举足轻重的地位[2]。（剩余8099字）