黑土地区水稻旱育苗床土调酸的研究

Study on the Regulation of Acidity for the Dry Seedling Nursery Soil of Rice in Black Soil Area

通过对９种供试土样的ｐＨ值、土壤盐碱性的电导率和酸中和容量的综合试验分析。结果表明，选用黑土和草甸土作苗床土较好，床土ｐＨ值较适宜的范围为３９０～４２４，同时，明确了对缓冲性较好的中性和弱酸性土壤进行床土调酸时适宜用酸量的计算方法＾ｙ＝０．０３６７＋０．０３８８ｘ，旨在为水稻旱育苗床土调酸提供理论依据。

The pH value,electric conductivity of soil acidity and alkalinity,and neutralization capacity of acid were analyzed comprehensively for 9 kinds of soil.The results showed as following:That black soil and meadow soil were the best for seedling nursery of rice,the optimal range of pH values was 3.90-4.24,and at the same times,the calculation method( =0.036 7+0.038 8x)of the appropriate acid was cleared when the acidity of the nursery soil was regulated for the neutral soil and weak acid soil of weaker buffer properties.The objective of the experiment was to provide theoretical basis for the regulation of acidity of the dry seedling nursery soil of rice.