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

李娜; 韩晓日; 杨劲峰; 刘宁; 李巧宁; 房大伟

doi:10.11674/zwyf.2012.12110

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

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

基金项目:

国家自然科学基金（31071861）; 国家科技支撑计划（2011BAD16B12）项目

详细信息

通讯作者:
韩晓日

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出版历程
- 收稿日期: 2012-03-15
- 修回日期: 2012-09-04
- 刊出日期: 2012-11-24

Effects of long-term fertilization on the availability of K adsorbed byclay minerals and profile distribution in brown soil

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

More Information

Corresponding author:
HAN Xiao-ri

摘要

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。
- 长期施肥 /
- 棕壤 /
- 吸附位点钾 /
- 表观平衡 /
- 有效性 /
- 剖面分布
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.
- long-term fertilization /
- brown soil /
- K adsorbed by clay minerals /
- apparent balance

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