【摘要】 本文是该项研究工作的第一部分内容,指出了苏打盐碱土区水稻育苗床土调酸存在的主要问题是“床土碱、置床碱、井水碱”,提出了按土壤缓冲容量、碳酸钙含量、PH值和电导率作为选择床土的标准,确定了硫酸是较好的调酸剂。更多还原

【Abstract】 Experiments showed alkalinity (≥pH8.0) of seedbedsoil, seedling farmland and well-water for irrigation is the main Problem in soda-so-lonchak region of Jilin Province. The standards for choosing the proper seedbed soil used in our studies are. buffering capacity <20m.e./100g, calcium carbonate<5 %,pH<8.5 and electrical conductivity less than 300 us/cm. Among seven pH regulators tested in our experiments, sulfuric acid is the best, because it could greatly decrease the pH value of the seedbed soil without increasing the concentration of harmful ions whichretard the growth of rice seedlings.(L)更多还原