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对吉林省东、中部277个各种不同类型的土壤进行速效钾和缓效钾含量的测定,确定了我省土壤速效钾和缓效钾含量一般都较高。速效钾含量较低的主要为东部的部分水田土壤(<70ppmk),其缓效钾含量也较低,为我省钾肥分配和施用的重点。我省土壤中速效钾与缓效钾之间的相关极显著(r=0.693),因此在测土施肥时一般只测定速效钾亦可。各种类型土壤的钾含量差异较小,都有含钾较高和较低的土壤,因此不能单按照土壤类型来区分土壤的供钾水平,以根据土壤速效钾测得值来判断较为合理。
The contents of available potassium and slow-acting potassium in 277 soils of different types in the east and middle part of Jilin Province were determined, and the contents of available potassium and slow-acting potassium in our province were generally high. Some of the lower part of available potassium in eastern paddy soil (<70ppmk), its slow potassium content is also low, which is the key point for the distribution and application of potash in our province. The correlation between available potassium and slow potassium in soils of our province is extremely significant (r = 0.693), so only the available potassium can be measured in soil testing. Different types of soils have little difference in K content, and both have higher and lower potassium contents. Therefore, it is not reasonable to distinguish the potassium supply level of soils by the type of soil alone.