欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

改良剂对苏打盐碱土玉米幼苗生长和生理特性的影响

王明华,李明*,高祺,甄善继,李乔,高红秀,金萍   

  1. (东北农业大学农学院, 哈尔滨 150030)
  • 出版日期:2016-11-10 发布日期:2016-11-10

Effects of amendments on growth and physiological characteristics of maize seedlings on salinealkali soil.

WANG Ming-hua, LI Ming*, GAO Qi, ZHEN Shan-ji, LI Qiao, GAO Hong-xiu, JIN Ping   

  1. (Agricultural College of Northeast Agricultural University, Harbin 150030, China).
  • Online:2016-11-10 Published:2016-11-10

摘要: 为了研究盐碱胁迫下改良剂——石膏、粉煤灰和聚丙烯酰胺(PAM)对玉米生长的保护机制及适宜配比,对盆栽玉米“郑单958”幼苗的离子含量、抗氧化酶活性、叶绿素含量等生理指标进行了分析。结果表明:添加改良剂后,玉米幼苗体内Na+含量显著降低,Ca2+和K+含量则显著增加(P<0.01);SOD、POD、CAT活性均有所增加(P<0.05);MDA、脯氨酸和可溶性糖含量下降(P<0.05);叶绿素a明显增加,荧光参数F0Fm也明显增加;总根长、根总表面积、根体积、根尖数、生物量和株高(P<0.05)也显著增加。相关分析表明,Na+含量与CAT活性(-0.60)、MDA含量(0.79)和叶绿素含量(-0.59)显著相关,Na+含量、MDA含量和CAT活性与玉米幼苗茎叶及根系生长相关显著。石膏与PAM配合(12 g石膏+0.75 g PAM·kg-1土)的效果最好。

关键词: 小麦, 施肥方式, 磷肥, 磷酸氢二铵, 磷酸二氢钙

Abstract: In order to study the protective mechanism and optimal proportion of gypsum, flyash and polyacrylamide (PAM) on maize growth under saline alkali stress, a pot experiment was conducted to investigate the ionic content, antioxidant enzyme activity, chlorophyll content, and other physiological indicators of maize hybrid Zhengdan 958 seedlings. The results showed that the amendments significantly decreased Na+, MDA, proline and soluble sugar contents, and increased Ca2+ and K+ contents, the activities of antioxidant enzymes (SOD, POD and CAT), chlorophyll a content, fluorescence parameters F0 and Fm, thereby the total root length, root surface area, root volume, root number, biomass and plant high were also significantly increased. Correlation analysis showed that Na+ content was significantly correlated with CAT activity (-0.60), MDA content (0.79) and chlorophyll content (-0.59), and the Na+ and MDA contents and CAT activity were significantly correlated with the growth of maize shoot and root. The combination of gypsum and PAM (12 g gypsum + 0.75 g PAM·kg-1 soil) had the best effects.

Key words: wheat, MCP, phosphorus fertilizer, DAP., application method