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长期施肥条件下栗褐土磷素积累特征

杨艳菊1,王改兰1**,张海鹏1,赵旭1,黄学芳2   

  1. 1湖南农业大学资源环境学院, 长沙 410128; 2山西农业科学院旱地农业研究中心, 太原 030031)
  • 出版日期:2013-05-10 发布日期:2013-05-10

Phosphorus accumulation characteristics in cinnamon soil under long-term fertilization.

YANG Yan-ju1, WANG Gai-lan1**, ZHANG Hai-peng1, ZHAO Xu1, Huang Xue-fang2   

  1. (1College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; 2Institute of Dryland Farming, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, Shanxi, China)
  • Online:2013-05-10 Published:2013-05-10

摘要:

2010—2012年研究了长期施肥条件下(1988—2012年)栗褐土速效磷、水溶性磷和生物有效磷积累量及三者之间的相关关系,并讨论了水溶性磷与土壤磷饱和度的相关关系。结果表明:长期施用磷肥和有机肥可显著增加栗褐土速效磷、水溶性磷和生物有效磷的含量且以高量有机肥配施化肥处理增加最为显著;P2O5用量为75 kg·hm-2、有机肥用量为45000 kg·hm-2的处理在2012年时,土壤磷饱和度大于25%,这显著增加了栗褐土磷素流失风险;速效磷、水溶性磷和生物有效磷的之间的相关性均达到极显著水平,其中速效磷与水溶性磷之间呈指数关系;磷饱和度与水溶性磷呈极显著指数关系。
 

关键词: 黄河中下游, 河岸带, 土壤性质, 冗余分析

Abstract: In 2010-2012, this paper studied the accumulated amounts of available phosphorus (P), water-soluble P, and bioavailable P in a cinnamon soil under long-term (1988-2012) fertilization, and analyzed the correlation between the soil water-soluble P and P saturation degree. Long-term application of P fertilizer and organic fertilizer increased the contents of the soil available P, water-soluble P, and bioavailable P significantly, which was most significant in the treatment of applying high amount organic fertilizer combined with chemical P fertilizer. In treatment 45000 kg·hm-2 of organic fertilizer plus 75 kg·hm-2 of P2O5, the soil P saturation degree in 2012 was >25%, which enhanced the P loss risk of cinnamon soil remarkably. There existed extremely significant correlations between the soil available P, water-soluble P, and bioavailable P, of which, the first two were of exponential relationship. In addition, there was an extremely significant exponential relationship between the soil P saturation degree and water-soluble P.

Key words: the middle and lower reaches of the Yellow River, riparian zone, soil properties, redundancy analysis.