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土地利用方式与坡位土壤活性铝形态特征分析
引用本文:吕焕哲,王凯荣,谢小立.土地利用方式与坡位土壤活性铝形态特征分析[J].水土保持学报,2007,21(1):172-175.
作者姓名:吕焕哲  王凯荣  谢小立
作者单位:1. 中国科学院亚热带农业生态研究所,长沙,410125;中国科学院研究生院,北京,100039
2. 中国科学院亚热带农业生态研究所,长沙,410125
基金项目:CERN野外台站研究项目;中国科学院知识创新工程项目
摘    要:以红壤坡地为材料,研究了地带性恢复林地、农作区、人工林地茶园和桔园等4种土地利用方式下土壤pH、有机质和铝形态的分异特征。结果表明,土壤pH、有机质和3种活性铝形态含量差异显著。和恢复区相比,农作区由于大量秸秆和根茬还土,土壤交换性铝的含量显著降低,而土壤吸附态羟基铝和有机络合态铝的含量则不同程度地提高;人工林地茶园和桔园则呈现出土壤交换性铝提高的特征,吸附态羟基铝和有机络合态铝含量下降。下坡位土壤表现为堆积,土壤pH值和有机质含量增加,土壤交换性铝含量比上坡位减少,吸附态羟基铝和有机络合态铝含量增加,降低了铝的毒性。相关分析表明,土壤pH值与土壤交换性铝呈显著负相关,y=-97.6x+6009.2(R^2=0.7315),与土壤吸附态羟基铝呈显著正相关,y=2810.8x-9293(R^2=0.9003);而土壤有机质含量与土壤交换性铝呈显著负相关,y=-2963x+17616(R^2=0.8977),与土壤有机络合态铝呈显著正相关,y=553.4x-4779.1(R^2=0.4364)。说明土壤铝形态在坡面上的分异特征是坡面利用类型与地形部位共同作用的结果。

关 键 词:土地利用方式  坡位  活性铝形态
文章编号:1009-2242(2007)01-0172-04
收稿时间:2006-11-05
修稿时间:2006-11-05

Character of Soil Aluminum Forms under Different Land Use and Slope Position
LV Huan-zhe,WANG Kai-rong,XIE Xiao-li.Character of Soil Aluminum Forms under Different Land Use and Slope Position[J].Journal of Soil and Water Conservation,2007,21(1):172-175.
Authors:LV Huan-zhe  WANG Kai-rong  XIE Xiao-li
Institution:1. Institute of Subtropical Agriculture ,Chinese Academy of Sciences, Changsha 410125 2. The Graduate School of CAS, Beijing 100039
Abstract:Different land use affect soil physical properties and nutrient characteristics, taking the hilly upland of red soil as a study case,the system selected consist of 4 different treatments of 10 years,that is regional natural recuperation,farming plot,planted forest tea plant and orange.We have investigated the soil characteristics and aluminum forms under different land use.The result showed that there is significant difference in the content of soil pH,organic matter and active aluminum forms by reasons of different land use.Compare to regional natural recuperation,the content of soil exchangeble aluminum in farming plot decreased because of straw and root stubble incorporation into the soil and adsorbent hydroxy aluminum and organically complexed aluminum increased.As for planted tea and orange plant,soil exchangeble aluminum increased,adsorbent hydroxy aluminum and organically complexed aluminum decreased.Soil corrasion transite to soil deposite from uphill slope to downhill slope position,so soil dissovled organic material piles up along with the runoff,which will increase soil pH and soil organic matter in downhill slope position.The correlation analysis indicated that soil pH value have a negative correlation with soil exchangeable aluminum and a positive correlation with soil adsorbent hydroxy aluminum remarbly,the equation is as follows respectively: y=-97.6x 6009.2(R2= 0.7315),y = 2810.8x-9293(R2=0.9003).Soil organic matter correlate with soil exchangeble aluminum negatively and with soil organically complexed aluminum positively,the equation is: y=-2963x 17616(R2=0.8977)and y=553.4x4779.1(R2=0.4364).As a result,the results showed that soil aluminum forms and nutrient properties largely depended on the land utilization and landscape on slope.
Keywords:land use pattern slope position  active aluminum forms
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