论文部分内容阅读
本文通过土壤基本理化性质,土壤含钾状况和钾素缓冲能力(Q/I)关系,对四川盆地西部一些主要土壤的供钾性能作一些探索,为钾肥的合理施用提供依据.一、试验内容、材料和方法(一)土壤理化性质的测定 在冬季(12月—1月)取耕作层(0～20厘米)土样,风干后过60号筛,作理化分析用;过100号筛作全钾分析用.按不同母质的土样,提取<1μm粘粒,分析粘土矿物组成.有关理化性质测定方法均按中国科学院南京土壤研究所编的《土壤理化分析》进行.质地用手测法.0.01MCaCl_2提取的钾系按《土壤学进展》(1979.5)所介
Based on the relationship between the basic physical and chemical properties of soil, the soil potassium status and the potassium buffering capacity (Q / I), this paper explores the potassium supply of some major soils in western Sichuan Basin and provides the basis for the rational application of potash fertilizer. MATERIALS AND METHODS A. Determination of Soil Physical and Chemical Properties Soil samples were taken from the tillage layer (0-20 cm) in winter (December-January), dried and passed through No. 60 sieve for physical and chemical analysis; Total potassium analysis.According to the different parent material of soil samples, <1μm clay was extracted to analyze the composition of clay minerals.The physical and chemical properties were determined according to “Physical and Chemical Analysis of Soil” by Nanjing Institute of Soil Science, Chinese Academy of Sciences. .0.01 The potassium extracted from MCaCl_2 is described in Advances in Soil Science (1979.5)