LI Yu-ying,LIU Shuang-quan,WU Ying,et al.Effect of Potash Application on the Dynamic Change of Potassium Content in Meadow Soil and Crops Yield[J].HEILONGJIANG AGRICULTURAL SCIENCES,2002,(01):26-27.[doi:10.11942/j.issn1002-2767.2002.01.0026]
长期施钾对草甸土钾素动态变化及产量的影响
- Title:
- Effect of Potash Application on the Dynamic Change of Potassium Content in Meadow Soil and Crops Yield
- 文章编号:
- 1002 -2767(2002)01 -0026 -02
- Keywords:
- meadow soil ; potash ; available K ; slow -released K ; crop yield
- 分类号:
- S143 .3
- 文献标志码:
- A
- 摘要:
- 采用定位方法研究连年施用钾肥对草甸土土壤钾素动态变化及产量的影响。红兴隆草甸土钾素含量较高, 施钾对大豆和小麦有一定的增产效果, 但增产幅度不大。施钾肥结合秸秆还田对增加作物产量, 提高钾肥利用率有积极作用。施钾肥和秸秆还田明显缓解土壤耕层速效钾和缓效钾含量的下降, 对维持土壤钾素平衡具有重要意义。
- Abstract:
- The method of fixed -site field experiment was adopted in the study .As the potassium content inmeadow soil in Hongxinglong Farm is fairly high , the effect of potash application on the increase of crops yieldwas not very significant .The experimental result indicated that potash application combined with the wheatstraw returning to the soil had a positive effect on crops yield and potash utilization efficiency .Potash applicationand the wheat straw returning to the soil have a significant effect on the decrease of available K and slow -released K content in the soil .It was very important for the balance of potassium content in the soil and thesustainable agriculture .
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备注/Memo
收稿日期:2001-11 -11