| 刘一锋，曾招兵，汤建东，曾思坚，张满红.广东耕地土壤速效钾变化趋势及影响因素分析[J].广东农业科学,2015,42(16):32-31 |
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广东耕地土壤速效钾变化趋势及影响因素分析 |
| Trend and influence factors analysis of soil availablepotassium of arable soil in Guangdong |
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| DOI： |
| 中文关键词: 广东 耕地土壤 速效钾 变化趋势 |
| 英文关键词: Guangdong arable soil available potassium variation trend |
| 基金项目:农业部耕地质量保护项目（ 农财发
［2014］20 号） |
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| 中文摘要: |
| 通过长期定位监测数据，对1984 年后的广东耕地土壤速效钾变化进行分析。结果表明：1984 年
以来，全省耕地土壤速效钾含量总体水平增加了近1 倍，年平均增加1.8 mg/kg，全省监测点速效钾含量属于
中上水平（大于100 mg/kg）的频率由“七五前”的10.1% 上升到“十二五”期间的38.4%，提高幅度超过
28.3%，而属于低水平（小于100 mg/kg）的频率在相同时期内则由 89.9% 下降到61.5%，全省土壤速效钾整体
仍处于较缺乏水平；不同区域的耕地土壤速效钾增加速率明显不同，其中珠三角地区速效钾含量增加76 mg/
kg，增幅为155%，年平均增加2.6 mg/kg，明显高于其他区域。施用钾肥是耕地土壤速效钾含量增加的主要原
因，不同耕地利用类型、施肥处理、秸秆是否还田与土壤速效钾含量有密切关系。 |
| 英文摘要: |
| Based on the long-term monitoring data，the paper analyzed the changes of cultivated soil available
potassium in Guangdong Province since 1984. The results showed that the overall level of Guangdong soil available
potassium content increased by one time，with an average annual increase of 1.8 mg/kg since 1984. In all the monitoring
points，the frequency of middle upper level（higher than 100 mg/kg）increased form 10.1%（the period of“ 7th Five-
Year Plan”）to 38.4%（the period of“ 12th Five-Year Plan”），the frequency of low level（lower than 100 mg/kg）
decreased form 89.9%（the period of“ 7th Five-Year Plan”）to 61.5%（the period of“ 12th Five-Year Plan”），the
available potassium was still in a relatively lack of level. The results also showed that the increase rates of soil available
potassium content in different regions were obviously different，the content of soil available potassium in the Pearl River
Delta region increased by 76 mg/kg，the annual average growth was 2.6 mg/kg，which was obviously higher than that of
other regions. The main reason of increase of soil available potassium content was to use potash fertilizers. The content
of soil available potassium of different cultivated land types，different fertilization treatments and straw returning has a
close relationship with the input of potash fertilizers. |
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