摘要
土壤酸碱性和电导率是影响土壤中化学反应及土壤肥料的重要因素.本文通过对聊城市生态农业示范区设置的32个土壤剖面采样,分析了生态农业耕作模式下的土壤理化性质及其相互关系,结果表明:研究区土壤pH值东部偏高西部偏低,基本呈条带状和斑块状分布,全区电导率变化呈现由西南向东北递减的趋势,有机质和有效P分别呈现带状分布和呈斑块状分布,有效N和速效K基本表现为由西南向东北递减的趋势;土壤pH值与电导率和有机质、有效N、有效P及速效K的相关性极显著,增施有机肥可使pH值下降,有效N含量过高反而会加快土壤盐化趋势,测土施肥方式对土地的有效利用具有积极意义.
The soil pH and electrical conductivity are affects the chemical reaction and the fertilizer important attribute of the soil. To reveal the physical and chemical properties and their correlations in soils under the mode of ecological agriculture, 32 soil profiles were set all over Liaocheng City. The results show that the distribution of pH expressed belting and patching shapes,the pH value in the west area the Liaocheng City is bigger than that in the east. The electrical conductivity in soils showed a significant grading change from southwest to northeast, the biggest value appearing in the southwest of Liaocheng City, and the smallest appearing in the northeast. The spatial distribution of nutrient in soils is complex,the organic matter and effective P distributing like belts and patches, the distribution of P and K is like the distribution of electrical conductivity expressing a grading distributing. Furthermore, the pH value in soils expressed an extremely significant inverse correlation with the concentrions of organic matter, effective N, effective P and rapidly-available K, which indicated that pH of soils influencing the content of effective N, P, K obviously. To decrease soil pH, increase the organic matter in soils is a good choice. Meanwhile, electrical conductivity increase with the increase of concentrations in N, P, K in soils, so rational fertilizing is provided.
出处
《聊城大学学报（自然科学版）》
2011年第2期61-69,共9页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金资助项目(40901276
40871239
41072258)
山东省软科学项目资助(2009RKA122)
关键词
生态农业
PH值
电导率
有效养分
相关性
聊城市
eco=agriculture, pH value, electrical conductivity, available nutrients, correlation, Li-aocheng City
