农业环境科学学报Issue(11)：2164-2170,7.DOI:10.11654/jaes.2014.11.014
温室土壤酸化评估的不同pH测定方法比较研究
Comparative Study of Different pH Determination Methods for Assessing Soil Acidification in Greenhouse System
摘要
Abstract
Five methods for pH determination were compared to seek an optimal assessment method of greenhouse soil acidification. Various amounts of KNO3 were added to obtain soils with a series of salinity without introducing foreign H+, while compound fertilizer(N-P2O5-K2O, 15%-15%-15%)was applied to get soils with a series of salinity with foreign H+inputs. These soils were subjected to incubation in green-house for three months. After that, soil pH was determined in distilled water without CO2(pHw), 0.01 mol·L-1 CaCl2 solution[pH(CaCl2)], saturated paste(pHw”), various concentrations of CaCl2 solution equal to salt concentration in field moist soil solution[pH(salt)], and lime potential(pHw-0.5pCa). The pHw, pH(CaCl2), pHw”, pH(salt), and pHw-0.5pCa values dropped by 0.02~1.41, 0~0.06, 0.36~0.64, 0.17~0.74, and 0.07~0.19 unit by KNO3 addition, and by 0.78~2.01, 0.28~1.49, 0.51~1.87, 0.57~1.89, and 0.53~1.56 unit by compound fertilizer addition , respectively . Hence , the pHw method over- estimated net acid addition and acidification in greenhouse systems . pH(CaCl2)and pHw-0.5pCa would be the best methods for assessment of greenhouse soil acidification.关键词
pH/测定/酸化评估/设施土壤/盐分积累/次生盐渍化Key words
pH/determination/acidification assessment/greenhouse soil/salt accumulation/secondary salinization分类
农业科技引用本文复制引用
王嫒华,段增强,董金龙,赵宇,汤英,李汛..温室土壤酸化评估的不同pH测定方法比较研究[J].农业环境科学学报,2014,(11):2164-2170,7.基金项目
国家科技支撑计划（2014BAD14B04）；国家自然科学基金（41401257）；江苏省自然科学青年基金 （）
