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生态学杂志 ›› 2023, Vol. 42 ›› Issue (12): 2972-2978.doi: 10.13292/j.1000-4890.202312.027

• 研究论文 • 上一篇    下一篇

不同土地利用类型盐碱土无机磷组分及其影响因素

贾雪莹1,王佩将1,田志杰2*,银海杏1,贾文茹1


  

  1. 1太原师范学院地理科学学院, 山西晋中 030619; 2忻州师范学院, 山西忻州 034000)
  • 出版日期:2023-12-10 发布日期:2024-06-10

Inorganic phosphorus fractions and the influencing factors in saline-alkali soils under different land use types.

JIA Xueying1, WANG Peijiang1, TIAN Zhijie2*, YIN Haixing1, JIA Wenru1   

  1. (1Institute of Geographical Science, Taiyuan Normal University, Jinzhong 030619, Shanxi, China; 2Xinzhou Teachers University, Xinzhou 034000, Shanxi, China).

  • Online:2023-12-10 Published:2024-06-10

摘要: 为探究不同土地利用类型盐碱土无机磷组分特征及其影响因素,以华北地区典型盐碱地为供试土壤,分析辣椒地、轻度盐碱玉米地、重度盐碱玉米地、向日葵地、羊草地、虎尾草地、碱蓬草地和裸地共8种土地利用类型土壤无机磷组分的差异特征。结果表明:盐碱土壤无机磷组分中Ca10-P所占比例最高,其他磷组分含量依次表现为Ca8-P>Al-P>O-P>Fe-P>Ca2-P。冗余分析和相关性分析结果表明,Ca2-P和Ca8-P与土壤pH、电导率、钠吸附比呈显著负相关(P<0.05),与速效磷、速效氮、速效钾呈显著正相关(P<0.05),土壤理化因子共解释了36.03%无机磷组分特征。因此,盐碱土中Ca2-P、Ca8-P是土壤磷有效性的关键组分,且主要受到pH、电导率和钠吸附比影响。根据8种土地利用类型土壤磷组分差异和理化性质,辣椒和向日葵可分别作为轻度和重度盐碱地改良利用的首选农作物,羊草可作为盐碱地生态修复的草地物种。此外,可以通过改善盐碱地土壤pH、电导率、钠吸附比、有机质等理化性质来提高土壤磷有效性。


关键词: 盐碱土, 土地利用类型, 无机磷组分, 土壤理化性质

Abstract: We explored the characteristics of inorganic phosphorus fractions and influencing factors in saline-alkali soils in North China, by analyzing soil samples from eight land use types, including pepper field, mildly saline-alkali corn field, heavily saline-alkali corn field, sunflower field, Leymus chinensis grassland, Chloris virgata grassland, Suaeda glauca grassland, and bare land. The results showed that the proportion of Ca10-P in soil inorganic phosphorus fractions of saline-alkali soil was the highest, and the proportions of other phosphorus fractions were following an order of Ca8-P>Al-P>O-P>Fe-P>Ca2-P. The results of redundancy analysis and correlation analysis showed that Ca2-P and Ca8-P were significantly negatively correlated with soil pH, electrical conductivity, and sodium adsorption ratio (P<0.05), but significantly positively correlated with available phosphorus, available nitrogen, and available potassium (P<0.05). Soil physicochemical factors explained 36.03% of the variations of inorganic phosphorus fractions. Ca2-P and Ca8-P of saline-alkali soil were the key fractions of soil phosphorus, and mainly affected by soil pH, electrical conductivity, and sodium adsorption ratio. According to the differences of phosphorus fractions and physicochemical properties of the eight land use types, pepper and sunflower can be used as the preferred crops for the improvement and utilization of mildly and severely saline-alkali land, respectively. L. chinensis can be used as a grassland species for ecological restoration of saline-alkali land. In addition, soil phosphorus availability in saline-alkali lands can be enhanced by improving soil physicochemical properties such as pH, electrical conductivity, sodium adsorption ratio, and organic matter.


Key words: saline-alkali soil, land use type, inorganic phosphorus fraction, soil physicochemical property.