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Position: Home > Articles > Study on the Potassium Supplying Capacity of the Cultivated Soil in Shenyang Region Journal of Shenyang Agricultural University 1992 (2) 103-107

沈阳市农田土壤的供钾能力

作  者:
常丽新;金耀青;张中原;张凤英
单  位:
沈阳市土肥站;沈阳农业大学土化系
关键词:
土壤;供钾能力;速效钾;缓效钾;密集栽培耗竭法
摘  要:
以沈阳市东陵区草甸土、棕壤两大类农田土壤为试材,用Nelson法进行小麦耗竭试验。结果表明,耗钾两季,NP处理土壤速效钾呈现不同程度消耗,最低值达21μgg~(-1),最高值达101μgg~(-1)。相关研究得出土壤速效钾和缓效钾仍是衡量本区土壤供钾水平的主要项目,小麦相对产量和相对吸钾量与土壤速效钾和缓效钾呈米氏曲线关系。根据Bray原则,土壤速效钾属缺、低、中、高的指标值分别为<42.5μgg~(-1)、42.5~58.5μgg~(-1)、58.5~116.0μgg~(-1)和>116μgg~(-1),可作为生产实践中测土施钾参数。本文还排列出供试土样供钾能力的顺序。
译  名:
Study on the Potassium Supplying Capacity of the Cultivated Soil in Shenyang Region
作  者:
Chang Lixin;Jin Yaoqin;Zhang Zhongyuan;Zhang Fengying Shenyang Agricultural University Working Station of Soil and Fertilizer Shenyang
关键词:
soil; potassium supplying capacity; exchangeable potass ium; non exchangeable potassium, intensive and suecessive method
摘  要:
In order to estimate the K supplying capacity of the soil in Shen- yang area pot experiment was carried out by means of Nelson's inten- sive and successive method. The soils for study included nine species of two great groups. The crop for study was wheat in succession. The highest value of exchangeable K dropped to 101μgg~(-1), and the lowest value dropped to 21μgg~(-1). The results also showeb that the exchangeable K anb nonexchangeable K in soil were the main factors to influence K supplying capacity in the area. The inbexes of exchangeable K were<42.5, 42.5~58.5, 58.5~116.0, >116.0μgg~(-1); the inbexes of non exchangeable K were <4.7, 4.7~13.0, 13.0~44.5, >44.5μgg~(1-).

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