| 长期施肥对棕壤矿物吸附点位钾有效性及其剖面分布的影响 |
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| 引用本文： | 李娜,韩晓日,杨劲峰,刘宁,李巧宁,房大伟.长期施肥对棕壤矿物吸附点位钾有效性及其剖面分布的影响[J].植物营养与肥料学报,2012,18(6):1413-1418. |
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| 作者姓名： | 李娜 韩晓日 杨劲峰 刘宁 李巧宁 房大伟 |
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| 作者单位： | 1.沈阳农业大学土地与环境学院,土壤肥料资源高效利用国家工程实验室,农业部东北玉米营养与施肥科学观测试验站,辽宁沈阳 110866 |
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| 基金项目： | 国家自然科学基金，国家科技支撑计划 |
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| 摘 要： | 运用连续提取法结合常规方法，研究玉米玉米大豆轮作条件下，经过31年不同施肥后棕壤矿物吸附的p位钾、 e位钾和i位钾的有效性及其剖面分布情况。结果表明: 耕层土壤各位点钾含量及占全钾比例均表现为i位＞e位＞p位; 长期单施化学钾肥或不施钾各位点钾含量降低，有机肥配施化肥可以维持土壤中各位点钾含量。相关分析表明，交换性钾与p位和e位钾相关性显著，相关系数分别为0.926*和0.886*; 植株地上部吸钾量与p和e位钾呈显著正相关关系，与i位钾呈极显著正相关关系（r=0.963**）; 不同位点间钾含量呈极显著正相关关系。在剖面分布中，p、 e和i位钾含量均表现为020 cm＞2040 cm。
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| 关 键 词： | 长期施肥 棕壤 吸附位点钾 表观平衡 有效性 剖面分布 |
| 收稿时间： | 2012-03-16 |
Effects of long-term fertilization on the availability of K adsorbed by clay minerals and profile distribution in brown soil |
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| LI Na HAN Xiao-ri YANG Jin-feng liu ning LI Qiao-ning FANG Da-wei.Effects of long-term fertilization on the availability of K adsorbed by clay minerals and profile distribution in brown soil[J].Plant Nutrition and Fertilizer Science,2012,18(6):1413-1418. |
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| Authors: | LI Na HAN Xiao-ri YANG Jin-feng liu ning LI Qiao-ning FANG Da-wei |
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| Institution: | 1.College of Land and Environment,Shenyang Agricultural University/National Engineering Laboratory of High Efficient Use on Soil and Fertilizer Resources/Experiment Station of Northeast Maize Nutrition and Fertilization,Ministry of Agriculture,Shenyang 110866,China |
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| Abstract: | The sequential extractions combined with conventional methods were used to study the availability of K adsorbed by clay minerals and the profile distribution under long term fertilization of brown soil, with a maize maize soybean rotation. Results showed that the contents of K and the proportion in total K on arable layer presented as follows: i＞e＞p. Contents of p, e and i sites K with chemical K fertilizer application and no K fertilizer application decreased. And organic manure with K fertilizer application could remain the amount of K at a higher level. Correlation analysis indicated positive correlation between p site K, e site K and exchangable K, and the correlation coefficient were 0.926*and 0.886*, respectively. A positive significant correlation was observed between p site K, e site K and the uptake of K by crops. And there was a highly significant correlation between i sites and the uptake of K by crops (r=0.963**). There was an extremely significant positive correlation among p site K, e site K and i site K. The tendency of contents of potassium were all changed with depth as follows: 0-20 cm＞20-40 cm. |
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| Keywords: | long-term fertilization brown soil K adsorbed by clay minerals apparent balance availability profile distribution |
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