浙江农业学报 ›› 2016, Vol. 28 ›› Issue (11): 1908-1914.DOI: 10.3969/j.issn.1004-1524.2016.11.16

• 环境科学 • 上一篇    下一篇

甘薯种植对苏北沿海滩涂土壤环境的影响

刘冲, 王茂文, 邢锦城, 丁海荣, 朱小梅, 赵宝泉, 董静, 温祝桂, 洪立洲*   

  1. 江苏沿海地区农业科学研究所,江苏 盐城 224002
  • 收稿日期:2016-05-05 出版日期:2016-11-15 发布日期:2016-11-16
  • 通讯作者: 洪立洲,E-mail:ychonglz@163.com
  • 作者简介:刘冲(1984—),男,江苏盐城人,硕士,助理研究员,主要从事耐盐植物栽培利用研究。E-mail:cellbio@163.com
  • 基金资助:
    盐城市农业科技创新专项引导资金(YK2015013)

Effects of sweet potato plantation on soil environment of coastal area in Northern Jiangsu

LIU Chong, WANG Mao-wen, XING Jin-cheng, DING Hai-rong, ZHU Xiao-mei, ZHAO Bao-quan, DONG Jing, WEN Zhu-gui, HONG Li-zhou*   

  1. Institute of Agricultural Sciences in Coastal Area of Jiangsu Province, Yancheng 224002, China
  • Received:2016-05-05 Online:2016-11-15 Published:2016-11-16

摘要: 为明确在苏北沿海滩涂上种植甘薯对土壤环境的影响,在3个盐分梯度的盐碱土上进行甘薯栽培试验,研究甘薯在不同盐分土壤下生长性状的差异以及甘薯种植对土壤盐分、养分、土壤微生物碳含量的影响。结果表明,随着土壤盐分的增加,甘薯生长受到抑制,但在2.0~3.1 g·kg-1土壤盐分水平下,甘薯生长性状与1.0~2.0 g·kg-1盐分下差异不显著,说明甘薯具有一定的耐盐性。在3.1~4.8 g·kg-1土壤盐分下甘薯各项生长指标显著下降,说明甘薯已受到严重的盐胁迫。随着甘薯生长进程,土壤盐分呈现逐渐下降的趋势,1.0~2.0、2.0~3.1 g·kg-1盐分的土壤的呼吸强度呈现先上升后下降的趋势,但在甘薯收获后,其土壤呼吸强度依然高于甘薯种植前。在甘薯生长期内,土壤全氮含量以及有机质含量先升后降,土壤全钾含量先降后升。土壤盐分越大,土壤微生物碳含量越低,随着甘薯生长进程,1.0~2.0、2.0~3.1 g·kg-1土壤盐分下,土壤微生物碳含量呈现逐渐增加的趋势。由此可见,甘薯具有一定的耐盐性。在苏北沿海滩涂上种植甘薯可降低土壤盐分,促进微生物繁殖,提高土壤养分,尤以对盐分含量为1.0~2.0、2.0~3.1 g·kg-1的盐碱地的生态环境的改善效果较好。

关键词: 甘薯, 土壤盐分, 土壤养分, 土壤微生物碳

Abstract: In order to explore the effect of sweet potato plantation on soil environment of coastal area in Northern Jiangsu, a field experiment with 3 concentrations of soil salt was carried out. It was shown that the growth of sweet potato was restrained with the increase of soil salt concentration. The growth of sweet potato had no difference in soils with salt concentration of 2.0-3.1 and 1.0-2.0 g·kg-1, indicating a certain salt resistance of sweet potato. When soil salt content was increased to 3.1-4.8 g·kg-1, the growth index of sweet potato dropped significantly. With the prolong of sweet potato growth, soil salt declined gradually, and the soil respiration intensity presented the downward trend after rising first in soils with 1.0-2.0 and 2.0-3.1 g·kg-1 salt concentration. After harvest, soil respiration intensity was still higher than that before sweet potato plantation. During the whole growth period, soil total nitrogen content and organic content presented the downward trend after rising first, while soil total potassium content presented the upward trend after decreasing first. The greater the soil salt, the lower the soil microbial carbon content. Along with sweet potato growth, the soil microbial carbon content showed an increasing trend in soils with salt concentration of 1.0-2.0 and 2.0-3.1 g·kg-1. Thus, sweet potato had certain salt resistance. For the coastal areas in Northern Jiangsu, sweet potato plantation could reduce soil salt content, promote the growth of microorganisms, improve soil nutrition, and significantly improve the ecological environment of saline soil, and was especially beneficial for soils with 1.0-2.0 and 2.0-3.1 g·kg-1 salt concentration.

Key words: sweet potato, soil salinity, soil nutrients, soil microbial carbon

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