黃土高原灌溉農(nóng)田土壤團粒與碳酸鈣關(guān)系研究_圖文

1、 第3 期 郭玉文，等:黃土高原灌溉農(nóng)田土壤團粒與碳酸鈣關(guān)系研究 319 Abstract: 1000-2618 ( 2008 03 -0319 -EA Relationship of CaC03 and soil aggregates in irrigated soil of the Loess Plateau , China GUO Yu_wen1 ,4 , WANG Shu-hong2 , ZHANG Yu-long3 , and 島lakoto KAT0 4 1 Chinese Research Academy of Environmental Sciences , Beijing 1

2、00012 P. R. China 2 Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 3 Land and Environment College Shenyang Agricultural University Shenyang 110161 P. R. China 4 Tokyo University of Agriculture and Technology , Tokyo 183 -00

3、51 Japan P. R. China Abstract: The relationship between soil aggregates and CaC0 3 in irrigated soil of the western Loess Plateau of China was studied by using soil aggregates analysis , Scanning Electron Micrograph (SEM/EDX and other methods. A negative relationship is found between aggregate quant

4、ity and CaC0 3 solubility. About 97 lJ毛 of aggregates are de- stroyed when CaC0 3 is dissolved. With a decrease of CaC0 3 distributed on aggregate surfaces , the amount of clay and silt that attach to the aggregate surface is decreased. CaC0 3 is distributed both on the aggregate surface and in the

5、interior. There are three cementation types of CaC0 3 on the mineral particles: CaC0 3 distributed among the mineral particles , CaC0 3 attached on the particle surfaces , and the clay minerals attached on the particle surfaces. Results indicate that CaC0 3 is the main cementing agent in loess aggre

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