营养型土壤改良剂对酸性土壤中钾的调节及玉米吸钾量的影响  

Effect of nutritive soil modifier on potassium activation and uptake by corn plants in acid soils

作　　者：郭和蓉[1] 陈琼贤[2] 郑少玲[1] 陈君[1] 严小龙[1] 

机构地区：[1]华南农业大学资源环境学院,广州510642 [2]广东省农科院蔬菜研究所,广州510640

出　　处：《土壤肥料》2004年第2期20-22,共3页Soils and Fertilizers

基　　金：广东省科技创新百项工程项目(199901002116)。

摘　　要：营养型土壤改良剂(以下简称改良剂)施入三种不同肥力水平的土壤进行恒温培养试验和盆栽试验,测定土壤有效钾的含量、盆栽试验玉米的生物量和钾吸收量。结果表明:对于有效钾含量高的土壤,改良剂能促进钾的缓效化,有利于土壤钾的保蓄,防止土壤钾的淋失;对于有效钾含量较低的土壤,改良剂可以活化土壤中的钾,提高土壤钾的有效性;不同肥力水平的土壤,改良剂都能促进玉米对钾的吸收,有利于提高钾肥的吸收利用效率。In the present study, nutritive soil modifier (hereinafter abbreviated as NSM) was applied to three kinds of acid soils with different characters. An indoor soil incubation experiment was conducted and a greenhouse soil pot experiment was conducted with corn plants(Zea mays L.). The major results showed,when the native potassium content in the soil was high , NSM could improve potassium adsorbed and prevent potassium from losing; when the native K content in the soil was lower, NSM could activate potassium and increase potassium availability in the soil; NSM could improve the nutrient environment of soil hence to increase the uptake efficiency for potassium, leading to a better growth of the maize plants.

关 键 词：营养型土壤改良剂 酸性土壤 钾 调节 玉米 肥力 钾肥 吸收利用效率 

分 类 号：S156[农业科学—土壤学]