我国主要土壤的云母含量与供钾潜力的关系
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RELATIONSHIP BETWEEN CONTENT OF MICA AND KSUPPLYING POTENTIAL IN SOME MAIN SOILS OF CHINA
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    摘要:

    本文主要介绍用化学方法测定我国主要地带性土壤的云母含量、不同粒级全钾量和钾风化系数,并计算出其钾供给潜力。试验表明:砖红壤、红壤和黄棕壤的云母含量低,而且多数集中在细粒级部分;紫色土和黄土母质发育的土壤含云母较高,但前者含细粒云母多,后者以粗粒云母为主;湖积物和海积物的云母含量取决于其物质来源。<2微米的粒级,全钾量大部分来自云母,>10微米的粒级,一半左右是来自云母。14个土壤的供钾潜力与钾风化系数有一致性倾向,风化系数低,供钾潜力差,反之,供钾潜力较高。

    Abstract:

    Contents of mica in 46 soil samples, total K in particles of different sizes in 51 soil sarriples and K weathering coefficients of 14 soil samples collected from the main zonal soils of China were determined by chemical methods, and the K-supplying potentials of these soils were also calculated. Content of mica in laterite was very low, that in red earth was more than that in laterite, but it. varied greatly with the parent materials. Content of mica in yellow-brown earth was slightly higher than that in red earth. The purple soils and soils derived from loess generally contained more than 20% of mica. Contents of mica in paddy soils derived from alluvium, lacustrine deposits and marine sedimenx ranged widely.From the relationship between contents of mica and content of total K in various fractions, it was found that the content of feldspar in the fraction<2μm was very low, therefore the total K in the fraction <2μm can be wholly calculated as Lhe content of mica, but half of total K in the fraction >10μm was the K contained in mica. In laterite, red earth, yellowbrown earth and purple soil, fine particles of mica amounted to 80-90% of total mica. While in fluvo-aquic soil, drab soil chernozem, castanozem and sierozem, the fine mica content decreased, and the coarse mica content increased, amounting to 36-47% of total mica.

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罗家贤,蒋梅茵.我国主要土壤的云母含量与供钾潜力的关系[J].土壤学报,1985,22(2):150-156. Luo jiaxian, Jiang Meiyin. RELATIONSHIP BETWEEN CONTENT OF MICA AND KSUPPLYING POTENTIAL IN SOME MAIN SOILS OF CHINA[J]. Acta Pedologica Sinica,1985,22(2):150-156.

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  • 在线发布日期: 2013-02-25
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