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当前位置: 首页 > 文章 > 不同钾肥对赤红壤和水稻土中铅有效性的影响 植物营养与肥料学报 2009,15 (1) 139-144
Position: Home > Articles > Effects of different potassium fertilizers on phytoavailability of Pb in red latersol and paddy soil Journal of Plant Nutrition and Fertilizers 2009,15 (1) 139-144

不同钾肥对赤红壤和水稻土中铅有效性的影响

作  者：
刘平;徐明岗;申华平;宋正国;杜文波
单  位：
中国农业科学院农业资源与农业区划研究所;山西省农业厅土肥站
关键词：
钾肥;铅;植物有效性;赤红壤;水稻土
摘  要：
采用盆栽试验,研究了赤红壤和水稻土上,施用4种钾肥(KH_2PO_4、K_2SO_4、KNO_3、KCl),在各为5种用量(K 0、60、140、240、360 mg/kg)条件下,小油菜对铅的吸收量及土壤溶液铅和植株吸收铅之间的关系。结果表明,赤红壤上KCl、KNO_3、K_2SO_4各处理土壤溶液铅的浓度均随钾肥施入量的增加而显著增加。其中KCl最高用量(360 mg/kg)下土壤溶液铅增加最高,达106.9%,K_2SO_4(K)240 mg/kg水平下增加97.8%;水稻土上3种钾肥的情况与之类似,只是增加幅度略低,这可能与赤红壤具有较多的可变电荷和因其CEC较小而缓冲性也小有关。两种土壤施用KH_2PO_4下,随施入量的增加,土壤溶液的铅均显著减少;KH_2PO_4最高用量下,赤红壤和水稻土水溶性铅分别比对照减少45.0%和63.8%。另外,种植第2季作物后,施用KH_2PO_4,两种土壤溶液铅含量与植株茎叶和根系吸收铅浓度之间均表现为良好的正相关。
译  名：
Effects of different potassium fertilizers on phytoavailability of Pb in red latersol and paddy soil
作  者：
LIU Ping~(1,2) XU Ming-gang~1 SHEN Hua-ping~1 SONG Zheng-guo~1 DU Wen-bo~3(1 Key Laboratory of Crop Nutrition and Fertilization,Ministry of Agriculture;Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beiiing 100081,China;2 Institute of Soil and Fertilizer,Shanxi Academy of Agricultural Sciences,Taiyuan 030031,China;3 Working Station of Soil and Fertilizer,Shanxi Ministry of Agricultural Sciences,Taiyuan 030002,China)
关键词：
potassium fertilizer;;Pb;;phytoavailability;;red latersol;;paddy soil
摘  要：
Effects of four kinds of potassium fertilizer(KH_2PO_4,K_2SO_4,KNO_3,and KCl)at five levels(K 0,60,140, 240,360 mg/kg)on the Pb concentration of rape and relationship between Pb content of paddy soil and red latersol solu- tion with the content of Pb absorpted by rape were examined in pot trial.Results showed that the Pb concentration of soil solution significantly increased with application of KNO_3,KCl,and K_2SO_4.The application of KCl(360 mg/kg)and K_2SO_4(240 mg/kg)can increase Pb content of soil solution up to 106.9% and 97.8%,respectively.There were similar effects of three kinds of potassium on paddy soil and increased rate was lower than that of latersol soil.The main reason was that latersol soil had more inconstant charges and smaller CEC than paddy soil.However,Pb content of soil solution was significantly decreased with application rate of KH_2PO_4,moreover Pb content of rape shoot also decreased in both paddy soil and latersol,and under its highest application rate the decreased rates of Pb concentration in latersol and pad- dy soil were 45.0% and 63.8%,respectively,compared with the control treatment.In the second season in KH_2PO_4 treatment,there were positive correlations between Pb absorbed by shoots and roots of rape and Pb content of soil solu tion.

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