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中国农学通报 ›› 2016, Vol. 32 ›› Issue (14): 146-151.doi: 10.11924/j.issn.1000-6850.casb16020028

所属专题: 畜牧兽医

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

吉林省西部土壤pH对羊草氮磷含量的影响

徐梦瑶,张 忻,苏堪剑,杜 萌,丰 硕,李月芬   

  1. (吉林大学地球科学学院,长春 130061)
  • 收稿日期:2016-02-05 修回日期:2016-04-27 接受日期:2016-02-25 出版日期:2016-05-17 发布日期:2016-05-17
  • 通讯作者: 李月芬
  • 基金资助:
    吉林省自然科学基金“基于生态化学计量学的草地退化机理研究——以大安市姜家店草场为例”(201215017);吉林大学基本科研业务费“吉林西部草地植物—土壤系统碳氮磷生态化学计量学研究”(200903033);2015年吉林大学大学生创新创业训练计划“吉林省西部退化草地羊草生态化学计量内稳性研究”(2015610791)。

Influence of Soil pH on Nitrogen and Phosphorus Contents ofLeymus chinensis in Western Jilin Province

Xu Mengyao, Zhang Xin, Su Kanjian, Du Meng, Feng Shuo, Li Yuefen   

  1. (College of Earth Sciences, Jilin University, Changchun 130061)
  • Received:2016-02-05 Revised:2016-04-27 Accepted:2016-02-25 Online:2016-05-17 Published:2016-05-17

摘要: 笔者基于生态化学计量学理论,以吉林省西部盐碱化草地羊草为研究对象,研究在不同盐碱化程度草地对羊草不同器官氮、磷元素含量及其比率的影响。结果表明:随着土壤pH的逐渐升高,羊草氮磷含量整体呈下降趋势,且均在中度盐碱化(pH 9.16~9.35)时突然升高出现峰值,随后羊草氮含量继续呈下降趋势,而磷含量则呈升高趋势。羊草根、茎、叶中N/P均在中重度盐碱化时出现最低值。羊草氮磷元素在地下部分的含量均小于地上部分的含量。羊草氮磷元素含量虽然随着pH升高而降低,但总体变化不大。可见,羊草耐盐碱性很强,是吉林省西部盐碱化草地重建的优势牧草。

关键词: 纳米TiO2, 纳米TiO2, 壳聚糖, 透性, 机械性能, 抑菌

Abstract: Based on the theory of ecological stoichiometry, this paper chose Leymus chinensis collected from saline-alkaline grassland in western Jilin Province as the study object and studied the influence of different degrees of saline-alkaline grassland on nitrogen and phosphorus contents and their ratio in different organs of Leymus chinensis. The results showed that with the increase of soil pH value, nitrogen and phosphorus contents decreased wholly. The contents suddenly increased to the peak in the medium saline-alkali grassland (pH 9.16-9.35), and then the nitrogen content declined while the phosphorus content increased. The N/P values of root, stem and leaf all declined to the minimum value in medium and severe saline-alkali grassland. The nitrogen and phosphorus contents of the aboveground part were higher than that of the underground part. Nitrogen and phosphorus contents of Leymus chinensis declined with the increase of soil pH value, but the change was not obvious. Thus, the ability of Leymus chinensis’ resistance to saline-alkaline grassland was quite remarkable and it could be the dominant grass for the reconstruction of saline-alkaline grassland in western Jilin Province.