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首页> 外文期刊>Moscow University Soil Science Bulletin >Potassium Status and Clay Mineralogy in Ordinary Chernozems Treated with Different Rates of Potassium Fertilizers
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Potassium Status and Clay Mineralogy in Ordinary Chernozems Treated with Different Rates of Potassium Fertilizers

机译：不同钾肥用量对普通黑钙土钾素状况和粘土矿物学的影响

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摘要

The effect of a single instance of potassium fertilization at rates of0, 70, 140, and 280 kg/ha on the potassium status and clay mineralogy was studied in a field experiment on ordinary chernozems. The content of exchangeable potassium determined by the Maslova method and the potassium potential vary with greatest reliability in response to increasing fertilizer rates. The content of easily exchangeable potassium and the potassium-buffering capacity are insignificantly affected by the application rate of potassium fertilizers. The chernozems under study without fertilization are characterized by a low supply of available potassium. When potassium fertilizers are applied at rates of 70 and 140 kg/ha, the soils pass into the category of unstable or high supply according to different gradation systems. The lower limit of the high or optimal supply category is reached only at the application of 280 kg/ha of potassium fertilizer. However, even in this case, chernozems are characterized by a low potassium supply according to the value of potassium potential and the content of nonexchangeable potassium. A single application of potassium fertilizers does not cause significant changes in the contents of illites in the clay fraction.
机译：在普通黑钙土的田间试验中，研究了单次施钾量分别为0、70、140和280 kg / ha的钾肥对钾状态和黏土矿物学的影响。通过Maslova方法测定的可交换钾含量和钾势随肥料用量的增加而以最大的可靠性变化。钾肥的施用量对易交换钾的含量和钾的缓冲能力影响不大。未受研究的黑钙土的特征在于可用钾的供应量低。当钾肥的施用量为70和140 kg / ha时，根据不同的分级系统，土壤会进入不稳定或高供量的类别。仅在施用280千克/公顷的钾肥时才能达到最高或最佳供应类别的下限。但是，即使在这种情况下，黑钙土的特征还在于根据钾电势的值和不可交换钾的含量，钾的供应量低。单一施用钾肥不会引起粘土级分中伊利石含量的显着变化。

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