›› 2014, Vol. 26 ›› Issue (1): 0-158.

• 环境科学 •    下一篇

临安山核桃林地土壤磷素状况及其淋失风险分析

赵伟明1,王艳艳2,马嘉伟2,3,胡杨勇2,童根平4,赵科理2,叶正钱2,*
  

  1. 1杭州市林业科技推广总站,浙江 杭州310016;2浙江农林大学 环境与资源学院,浙江 临安 311300;3 信息产业电子第十一设计研究院 浙江 杭州 310020;4浙江清凉峰国家级自然保护区管理局,浙江 临安 311300
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-01-25 发布日期:2014-07-09

Phosphorus status and its leaching loss risks in the soils of Chinese hickory orchards in Linan City, Zhejiang Province

ZHAO Wei\|ming;WANG Yan\|yan;MA Jia\|wei;HU Yang\|yong;TONG Gen\|ping;ZHAO Ke\|li;YE Zheng\|qian;*   

  1. 1Hangzhou Forestry Extension Station of Zhejiang,Hangzhou 310016, China;2School of Environmental and Resource Sciences,Zhejiang A&F University, Linan 311300,China; 3The IT Electronics Eleventh Design and Research Institute Scientific and Technological Engineering Corporation Limited, Hangzhou 310020; 4Management Office, Mount Qingliangfeng National Nature Reserve of Zhejiang Province, Linan 311321, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-01-25 Published:2014-07-09

摘要: 以天目山地区临安市岛石镇下塔村和湍口镇湍口村发育于石灰岩的山核桃林地土壤为研究对象,采集林地表层(0~20 cm)土壤样品,用于评估长期施肥对山核桃林地土壤磷素状况的影响及其潜在的淋失风险。土壤分析表明:土壤Olsen\|P存在较大的空间变异,含量低的近于0 mg·kg-1,而最高的含量达 893 mg·kg-1。土壤CaCl2\|P与Olsen\|P相关分析显示,岛石镇和湍口镇土壤Olsen\|P的临界值分别为193和293 mg·kg-1。据此,岛石和湍口两地土壤发生磷淋失的林地分别占调查林地的30%和45%。表明研究区已经有相当数量的山核桃林地因土壤磷素积累而存在淋失风险,需要引起重视。

关键词: 山核桃, 石灰岩, 临界值, 土壤磷淋失, Olsen\|P, CaCl2\|P

Abstract: In this paper, 50 top soil samples (0\|20 cm) were collected from Chinese hickory (Carya cathayensis Sarg.)orchards located at Daoshi and Tuankou towns of Linan City, Zhejiang Province, to assess the potential risk of phosphorus (P) leaching induced by long\|term fertilizer application. Soil analysis showed that soil Olsen\|P had a great spatial variability, being 0\| 893 mg·kg-1. Analysis of correlations between Olsen\|P and CaCl2\|P showed that the critical values (change\|point) of soil Olsen\|P in Daoshi and Tuankou towns were 193 and 293 mg·kg-1, respectively. Soil Olsen\|P exceeding the critical values accounted for 30% and 45% of all the investigated orchards, respectively, in Daoshi and Tuankou towns.

Key words: Chinese Hickory orchard, limestone, critical valve, P leaching, Olsen\|P, CaCl2\|P