黄瓜温室土壤溶液中钾的动态变化及其淋失特征

doi:10.7668/hbnxb.2016.03.034

华北农学报 ›› 2016, Vol. 31 ›› Issue (3): 233-238. doi: 10.7668/hbnxb.2016.03.034

所属专题： 黄瓜；土壤肥料；

• 论文 • 上一篇

黄瓜温室土壤溶液中钾的动态变化及其淋失特征

刘建霞^1,3, 赵英男¹, 李博文¹, 刘文菊¹, 马理²

1. 河北农业大学资源与环境学院, 河北省农田生态环境重点实验室, 河北保定 071001;
2. 河北永清县蔬菜管理局, 河北永清 065600;
3. 中国冶金地质总局地球物理勘查院, 河北保定 071001

收稿日期:2016-03-17 出版日期:2016-06-28
通讯作者: 李博文(1963-),男,河北文安人,教授,博士,博士生导师,主要从事土壤环境科学研究;刘文菊(1971-),女,河北景县人,教授,博士,博士生导师,主要从事土壤环境质量研究。
作者简介:刘建霞(1986-),女,河北吴桥人,硕士,主要从事设施蔬菜土壤硝酸盐面源污染研究。刘建霞、赵英男为同等贡献作者。
基金资助:
国家科技支撑计划项目(2012BAD15B02);河北省科技计划项目(14227305D)

Dynamics of Potassium Concentrations in Soil Solution and Characteristics of Potassium Leaching from Soil in Greenhouses with Cucumber

LIU Jianxia^1,3, ZHAO Yingnan¹, LI Bowen¹, LIU Wenju¹, MA Li²

1. College of Resources and Environmental Sciences, Agricultural University of Hebei, Key Lab for Farmland Ecological Environment of Hebei Province, Baoding 071001, China;
2. Yongqing County Vegetable Administration of Hebei Province, Yongqing 065600, China;
3. Geophysical Exploration Academy of China Metallurgical Geology Bureau, Baoding 071001, China

Received:2016-03-17 Published:2016-06-28

摘要/Abstract

摘要： 为探讨黄瓜温室土壤溶液中钾含量的变化特征,以河北永清县黄瓜主产区的黄瓜温室为研究对象,研究了黄瓜温室整个生育期根层(35~40cm)和非根层(95~100cm)不同深度土壤溶液中钾的动态变化规律及土壤中钾的淋失特征。结果表明,根层(35~40cm)各处理土壤溶液钾含量为47.7~114.0mg/L,呈现升高-降低-升高的趋势;在非根层(95~100cm)土壤溶液中,常规施钾处理(施钾量为3022kg/hm²)的钾含量(40.3~105.0mg/L)动态变化规律与根层相似,而对照处理(不施钾)的钾含量(49.6~66.5mg/L)和推荐施钾处理(施钾量为600kg/hm²)的钾含量(30.6~42.8mg/L)随时期无明显变化。土壤淋溶液中钾的浓度随施钾量的增加呈不同程度的升高趋势,其浓度为27.9~65.1mg/L,黄瓜整个生育期土壤钾的总淋失量为154kg/hm²。综上所述,该试验区黄瓜温室存在一定程度的钾淋失风险,推荐600kg/hm²在保证产量的基础上可以降低钾素的淋失,可有效增加经济效益和环境效益。

关键词: 温室土壤, 钾淋失, 钾肥农学效率, 土壤溶液, 土壤质地

Abstract: In order to probe into variation characteristics of leaching of potassium from soil,a study was conducted in cucumber greenhouse in Yongqing of Hebei Province to investigate dynamics of potassium concentrations in soil solution and leaching of potassium from soils during the whole cucumber growth period by the different fertilizer application.The results showed that dynamics of potassium concentrations in soil solution collected in the depths at 35-40 cm and 95-100 cm soil layers.Potassium concentration (47.7-114.0 mg/L) for all the treatments increased at first,decreased subsequently and then increased again in soil solution at 35-40 cm for greenhouse.Meanwhile potassium concentrations in soil solution at 95-100 cm (40.3-105.0 mg/L) kept the similar dynamic trend to that at 95-100 cm for conventional potassium rate treatment.However,potassium concentrations in soil solution of CK (49.6-66.5 mg/L) and the treatment of recommended potassium rate (30.6-42.8 mg/L) kept stable during different periods at 95-100 cm.Potassium levels of leaching solution increased with increase of potassium application rate and ranged at 27.9-65.1 mg/L for the cucumber greenhouse.Total amounts of potassium leaching from soil layer (0-100 cm) of the greenhouse was 154 kg/ha.Therefore,the application rates at 600 kg/ha could not only keep the high yields of cucumber and reduce soil potassium leaching loss,but also increase the economic benefit and environment benefit effectively.

Key words: Greenhouse soil, Potassium leaching, Potassium fertilizer agronomic efficiency, Soil solution, Soil texture

中图分类号:

S151.9+3

刘建霞, 赵英男, 李博文, 刘文菊, 马理. 黄瓜温室土壤溶液中钾的动态变化及其淋失特征[J]. 华北农学报, 2016, 31(3): 233-238. doi: 10.7668/hbnxb.2016.03.034.

LIU Jianxia, ZHAO Yingnan, LI Bowen, LIU Wenju, MA Li. Dynamics of Potassium Concentrations in Soil Solution and Characteristics of Potassium Leaching from Soil in Greenhouses with Cucumber[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(3): 233-238. doi: 10.7668/hbnxb.2016.03.034.

http://www.hbnxb.net/CN/Y2016/V31/I3/233

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