韶关市典型香芋产区土壤剖面特征及其养分变化研究.

【Objective】In order to provide scientific references for fragrant taro planting, reasonable fertilization and improvement of fragrant taro quality, the present paper studied soil profile and nutrient characteristics of fragrant taro. 【Method】Through field soil profile observation and laboratory test, the soil profile characteristics and nutrient content vertical distribution of fragrant taro were studied by SPSS software and Origin software. 【Result】(i) The soil thickness of 6 soil profiles was deep. The depth of the topsoil and the heartsoil was between 65 and101 cm, were all mature soil, the configuration includes the plough layer and plough pan, the redox deposition layer and the maternal layer, the topsoil was affected by artificial farming and forms the plough layer and plough pan, colors are mainly black and brown. The heartsoil was relatively stable, influenced by soil factors, the soil presents orange and red color. The structure respectably presents the obvious iron and manganese film;(ii) The particle composition was mainly composed of granules. The silt content was between 40 % and 67 %. The texture was mainly clay loam, silty loam and loam; The weathering of soil profile is not high, and the degree of weathering decreases with the depth of profile. The nutrients content of the 6 soil profiles decreased as the depth increased.【Conclusion】In the fragrant taro, the soil horizon is deep, the degree of weathering is not high and nutrient elements present the distribution of surface agglomeration. [ABSTRACT FROM AUTHOR]