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生态学杂志 ›› 2021, Vol. 40 ›› Issue (3): 627-634.doi: 10.13292/j.1000-4890.202103.030

• 研究报告 • 上一篇    下一篇

生物炭调控盐胁迫下水稻幼苗耐盐性能

黄晶,孔亚丽,吴龙龙,张露,朱练峰,曹小闯,朱春权,张均华*   

  1. (中国水稻研究所, 水稻生物学国家重点实验室, 杭州 310006)
  • 出版日期:2021-03-10 发布日期:2021-03-12

Biochar regulates the salt tolerance of rice seedlings under salt stress.

HUANG Jing, KONG Ya-li, WU Long-long, ZHANG Lu, ZHU Lian-feng, CAO Xiao-chuang, ZHU Chun-quan, ZHANG Jun-hua*   

  1. (China National Rice Research Institute, State Key Laboratory of Rice Biology, Hangzhou 310006, China).
  • Online:2021-03-10 Published:2021-03-12

摘要: 土壤盐渍化降低土壤生产力。探索生物炭对盐胁迫下水稻幼苗耐盐性能的影响,对调控盐渍区水稻生产潜力具有重要意义。本研究通过生物炭介入盐胁迫稻田土壤的盆栽试验,调查了生物炭对盐胁迫下土壤环境和水稻幼苗耐盐性能的影响。盐胁迫设置4个水平,分别为0 g NaCl·kg-1土(S0),1 g NaCl·kg-1土(S1),2 g NaCl·kg-1土(S2),3 g NaCl·kg-1土(S3)。生物炭设置2个水平,分别为0 g生物炭·kg-1土(C0),3 g生物炭·kg-1土(C1)。结果表明:生物炭介入盐胁迫土壤,显著提高了水稻幼苗地上部干物重,有效改善了水稻幼苗农艺性状,显著提高了水稻幼苗茎秆中全钾含量,显著提高水稻幼苗钾钠比79.61%,提高了水稻幼苗耐盐性。生物炭介入也对水稻幼苗抗氧化性能有改善作用,显著降低了水稻幼苗中丙二醛含量,平均显著降低14.25%,抑制膜脂过氧化作用,提高抗氧化能力,减轻盐胁迫对水稻幼苗的伤害。水稻幼苗收获后土壤中水溶性氯离子和水溶性钠离子含量在生物炭介入条件下分别显著降低9.13%、17.77%。因此,添加适量生物炭能有效降低土壤水溶性盐含量,改善土壤盐胁迫环境,提升水稻对盐渍土壤的适应能力。

关键词: 生物炭, 盐胁迫, 水稻幼苗, 耐盐

Abstract: Salinization reduces the productivity of soils. Exploring the effects of biochar on salt tolerance of rice seedlings under salt stress is important to regulate rice production potential in saline areas. In this study, the effects of biochar on soil environment and salt tolerance of rice seedlings under salt stress were examined in a pot experiment. There were four levels of salt concentrations: 0 g NaCl·kg-1 soil (S0), 1 g NaCl·kg-1 soil (S1), 2 g NaCl·kg-1 soil (S2), and 3 g NaCl·kg-1 soil (S3). There were two levels of Biochar applications: 0 g biochar·kg-1 soil (C0) and 3 g biochar·kg-1 soil (C1). The results showed that biochar application in salt stressed soil significantly increased aboveground biomass and agronomic characters of rice seedlings. Biochar application significantly increased total K content in the stem of rice seedlings and enhanced K/Na ratio in rice seedlings by 79.61%. Biochar application greatly improved the antioxidant abilities of rice seedlings and reduced the MDA content of leaves by 14.25%. Biochar application inhibited membrane lipid peroxidation of rice seedlings and alleviated the negative effects of salt stress on rice seedlings. After the harvest of rice seedlings, soil watersoluble Cl- and Na+ contents under biochar treatments were significantly decreased by 9.13% and 17.77% respectively. Our results showed that applying appropriate amount of biochar in the soil can effectively reduce soil watersoluble salt content, improve the salt stress of soil, and enhance the adaptability of rice seedlings to the saline soil.

Key words: biochar, salt stress, rice seedling, salt tolerance.