摘要
通过对大面积土壤各形态钾的定位监测,研究了1982~2016年30余年间冀东滨海平原稻区土壤钾库的现状、变化及其影响因素,分析了成土母质、耕种施肥等对该区域土壤钾库的影响。主要结果:(1)冀东滨海平原稻区土壤全钾、缓效钾、速效钾平均含量分别为23.04 g/kg、1615.94 mg/kg、247.37 mg/kg。种稻40~70余年间,各年限土壤全钾、速效钾分别维持在23.96 g/kg、257.41 mg/kg左右。与种稻40年相比,缓效钾年均减少20.19 mg/kg。(2)不同母质土壤全钾、缓效钾、速效钾含量大小顺序为:海相沉积物、泻湖沉积物>河流冲积物;土壤缓效钾/全钾和速效钾/全钾均为海相沉积物、泻湖沉积物>河流冲积物,3种母质发育的土壤速效钾/缓效钾差异不显著;海相沉积物、泻湖沉积物二者之间的各形态钾含量及比值均无显著差异。(3)土壤速效钾与土壤盐分、有机质均呈显著正相关关系;土壤速效钾与有效磷无显著相关关系。主要结论:随种植年限增加,土壤全钾、速效钾无显著变化,缓效钾显著下降。海相沉积物、泻湖沉积物发育的土壤全钾、缓效钾、速效钾的含量均显著高于河流冲积物,土壤速效钾与盐分呈显著正相关关系。稻区土壤钾输入量小于水稻钾的输出量,随着种稻年限的增加,逐渐消耗土壤缓效钾。
Based on in situ monitoring of various soil potassium forms,we investigated how parent material and long-term rice planting(from 1982 to 2016)changed soil potassium content in the coastal plain,eastern Hebei province.Results showed that:(1)Average contents of the total potassium,slowly available potassium and rapidly available potassium of the paddy soil were 23.04 g/kg,1615.94 mg/kg and 247.37 mg/kg,respectively.For the paddy soil with 40~70-years rice planting,the annual rate of the slowly available potassium pool was reduced by 20.19 mg/kg.(2)Soils developed from marine and lagoon sediments had similar potassium pools with respect to the total potassium,slowly available potassium and the rapidly available potassium,and also had similar proportions of the slowly available potassium to total potassium and the rapidly available potassium to total potassium,which were all greater than the respective ones of the alluvial sediments.In addition,for all three sediments no significant differences in the rapidly available potassium to the slowly available potassium proportion were found.(3)The soil salinity and organic matter were both positively correlated to the soil rapidly available potassium,and no significant correlations between the rapidly available potassium and the available phosphorus were observed.The conclusions showed that:With the increase of planting years,contents of the total potassium and rapidly available potassium of the paddy soil did not change significantly,slowly available potassium decreased significantly.The total potassium,slowly available potassium and the rapidly available potassium in marine and lagoon sediments were significantly higher than those in the alluvial sediments,and there was a significant positive correlation between the rapidly available potassium and the soil salinity.The potassium input in rice area was less than the potassium output,and the slowly available potassium was gradually consumed with the increase of growing years.
作者
张月博
刘建玲
杨扬
廖文华
杨绍国
赵英杰
ZHANG Yue-bo;LIU Jian-ling;YANG Yang;LIAO Wen-hua;YANG Shao-guo;ZHAO Ying-jie(College of Resources and Environment Sciences,Hebei Agricultural University,Baoding Hebei 071001;Agriculture,Forestry,Animal Husbandry and Fishery Bureau of Caofeidian District,Tangshan City,Tangshan Hebei 063200)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2019年第6期49-54,共6页
Soil and Fertilizer Sciences in China
基金
河北省科技支撑项目(12220204D)
关键词
滨海平原
稻区
土壤钾库
成土母质
影响因素
coastal plains
rice area
soil potassium
soil parent material
influencing factor
作者简介
张月博(1993-),女,河北石家庄人,在读硕士研究生,主要从事新型肥料与高效施肥研究。E-mail:779156383@qq.com;通讯作者:刘建玲,E-mail:jlliu@hebau.edu.cn。
