Position: Home > Articles > Study on Difference of Potassium Fixation Capacity of Soils in Northern and Northwestern Regions of China
Soils
2009,41
(3)
408-412
华北与西北地区典型土壤固钾能力差异研究
作 者：
谭德水;金继运;黄绍文;刘兆辉;江丽华
单 位：
山东省农业科学院土壤肥料研究所;中国农业科学院农业资源与农业区划研究所
关键词：
西北华北地区;典型土壤;固钾能力
摘 要：
试验在我国华北和西北小麦玉米种植地区进行,研究了几种典型土壤在连续13年的K肥施用及小麦秸秆还田条件下耕层土对外源K素的固定能力差异。结果表明:相比常年只施NP肥处理,连续施用K肥或秸秆还田可显著降低土壤对外源K素的固定量,土壤固K量随环境溶液中K素浓度的增加而增加,但固定率下降。随土层变深,各定位点土壤固K量和固K率均随之增加,华北两定位点相对明显。轮作地区各处理0～20cm土层土壤对外源K素的固定量(率)均远高于原始土壤,而单作区土壤的固K量(率)稍高或低于原始土。土壤固K能力表现出地带性规律,整体看取自华北两个定位点的土壤对外源K的固定能力强于取自西北两个定位点的土壤。
译 名：
Study on Difference of Potassium Fixation Capacity of Soils in Northern and Northwestern Regions of China
作 者：
TAN De-shui1, JIN Ji-yun2, HUANG Shao-wen2, LIU Zhao-hui1, JIANG Li-hua1 (1 Soil and Fertilizer Institute, Shandong Academy of Agricultural Sciences, Jinan 250100,China; 2 Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081,China)
关键词：
Northern and northwestern regions, Representative soils, K fixation capacity
摘 要：
Experiments were conducted to study the difference of potassium fixation capacity of soils under 13 year application of K fertilizer and wheat straw return in the northwestern region and northern region of China. The results showed that continuous application of K fertilizer and wheat straw return could reduce fixation rate of added K significantly compared with NP treatment. With the increase of K concentration in the surrounding solution, K fixation capacity of soils increased but the percentage of the total K in the solution fixed by soils reduced. K fixation rate in subsoil layer (20～40 cm) was greater than that in the top layer soil (0～20 cm), and it was more obvious in the northern region. K fixation rate by soils under double cropping region was higher than original soil but contrary under sole cropping region. K fixation capacity increased from the northwestern region to the northern region.
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