苏南地区水稻土表观络合能力的初步研究
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A PRIMARY STUDY ON THE APPARENT COMPLEX-ABILITY OF PADDY SOILS IN SOUTHERN JIANGSU
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    摘要:

    在苏州地区水稻土发僵问题的研究中,曾指出:耕层土壤的总孔隙度和粗孔隙量低,细孔隙的比例高是发僵水稻土的孔隙特性(陈家坊等,1978)。同时也初步指出,发僵水稻土的耕层,在土壤胶体数量上,在还原过程中土壤有机物质可能提供的电子和配位基的相对多少,以及土壤交换性阳离子组成上,都表现出一定的特点。

    Abstract:

    A soil sample submerged in water previously was saturated with Cu++ by 1 N CuCl2, and its cation exchange capacity was then determined by leaching with 1 N NH4Cl. However, the eation exchange capacity obtained was always lower than untreated samples. This indicated that certain amounts of Cu++ were attracted by exchange site. The △ valve of CEC showed a well positive correlation with dithionite-citrate soluble Fe2O3 and clay content of the soil samples used in present experiment. (r2=0.51 for Fe and r2=0.64 for clay; n=25).The total amount of fined Cu++, including a part of complexed form was determined eolorimetrically in the same extracting solution used for CEC measurement of soils treated with Cu++. It was showed that there is not any correlation between the total amount of fixed Cu++ and the organic matter or clay content of the samples. However, the difference between the amount of fixed Cu++ and △ value of CEC was correlated with the organic matter content and C/N ratio of soils.

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陈家坊,武玫玲.苏南地区水稻土表观络合能力的初步研究[J].土壤学报,1979,16(2):138-144. Chen Chia-fang, Wu Mei-ling. A PRIMARY STUDY ON THE APPARENT COMPLEX-ABILITY OF PADDY SOILS IN SOUTHERN JIANGSU[J]. Acta Pedologica Sinica,1979,16(2):138-144.

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  • 在线发布日期: 2013-02-25
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