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不同覆盖物对烤烟根温及生长和生理特性的影响

贾志红1,2;易建华2;孙在军2   

  1. 1中国科学院亚热带农业生态研究所, 长沙 410125;
    2长沙卷烟厂技术中心, 长沙 410007
  • 收稿日期:2005-10-08 修回日期:2006-09-15 出版日期:2006-11-18 发布日期:2006-11-18

Effects of different mulches on rhizosphere temperature, growth, and physiological properties of flue-cured tobacco

JIA Zhihong1,2; YI Jianhua2;SUN Zaijun2   

  1. 1Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    2Technical Center of Changsha Cigarette Factory, Changsha 410007, China
  • Received:2005-10-08 Revised:2006-09-15 Online:2006-11-18 Published:2006-11-18

摘要: 分别以大棚膜、稻草+大棚膜、普通膜、稻草、稻草+遮阳网和遮阳网为覆盖材料,研究覆盖物对烤烟根温以及生长和生理特性的影响.结果表明,各覆盖处理22 d对5和15 cm土壤总积温的影响明显不同,5 cm土壤总积温最高为大棚膜处理(424.75 ℃),最低为稻草+遮阳网处理(378.75 ℃),22 d 的15 cm土壤总积温最高为大棚膜处理(396.75 ℃),最低为遮阳网处理(368.31 ℃).随着土壤总积温的升高,烟株地上部和地下部干重都呈增长趋势,光合作用增强,根系活力提高;揭膜后第10天烟株根系干重有所增加,普通地膜处理的根系生物量增加最多,稻草+遮阳网处理最少.

关键词: 灰渣场, 土壤酶, 植被状况, 土壤化学性质

Abstract: With greenhouse plastic film, rice straw plus greenhouse plastic film, soil-mulching plastic film, rice straw, rice straw plus sun-shading net, and sun-shading net as test mulches, this paper studied their effects on the rhizosphere temperature, growth, and physiological properties of flue-cured tobacco. The results showed that after mulching for 22 days, the accumulative rhizosphere temperature at the depth of 5 cm was the highest (424.75 ℃) for greenhouse plastic film and the lowest (378.75 ℃) for rice straw plus sun-shading net, while that at the depth of 15 cm was the highest (396.75 ℃) for greenhouse plastic film and the lowest (368.31 ℃) for sun-shading net. With the increase of accumulative rhizosphere temperature, the dry weight of above- and underground parts, photosynthesis, and root vigor of flue-cured tobacco tended to increase, and at the 10th day after mulches removal, root biomass had the largest increment in the treatment of soil-mulching plastic film and the smallest increment in the treatment of rice straw plus sun-shading net.

Key words: Coal cinder yard, Soil enzyme, Vegetation state, Soil chemical properties