论文部分内容阅读
室内培养试验结果表明 :山西石灰性土壤在田间持水量条件下 ,加入不同浓度的外源钾后 ,经过一段时间培养 ,土壤释钾量随加入外源钾浓度的增加而增加 ,施加膨润土后土壤释钾量明显高于未施加膨润土的土壤 .在干湿交替过程中 ,土壤固钾能力增强 ,其固钾量随加入外源钾浓度的增加而增加 ,施加膨润土后土壤固钾量明显降低
The experiment results of indoor culture showed that the calcareous soil of Shanxi increased with the increase of exogenous potassium concentration after adding different concentrations of exogenous potassium under field water holding capacity for a period of time. After applying bentonite soil, The amount of potassium released was significantly higher than that of the soil without bentonite. During the wet-dry alternation process, the ability of potassium fixation in soil increased, and the amount of potassium fixation increased with the increase of potassium concentration. The content of potassium in soil decreased remarkably after applying bentonite