• ISSN 1008-505X
  • CN 11-3996/S
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. DOI: 10.11674/zwyf.2012.12110
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. DOI: 10.11674/zwyf.2012.12110
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 byclay minerals and profile distribution in brown soil[J]. Journal of Plant Nutrition and Fertilizers, 2012, 18(6): 1413-1418. DOI: 10.11674/zwyf.2012.12110
Citation: 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 byclay minerals and profile distribution in brown soil[J]. Journal of Plant Nutrition and Fertilizers, 2012, 18(6): 1413-1418. 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

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

  • 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。

     

    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.

     

/

返回文章
返回