【摘要】 <正> 水解聚丙烯腈是一种土壤结构改良剂,它具有大量的活性功能基,如羧基（—COOH）,胺基（—NH₂）,酰胺基（—CONH₂）等等。这些活性功能基在溶液中离解,产生剩余价键,使聚合物离解成具有许多活性点的带电荷的离子。这种具有大量活性功能基的土壤结构改良剂,在土壤介质这一分散系统中,引起土壤胶体和金属离子发生一系列复杂的化更多还原

【Abstract】 The present paper deals with preliminary study on the influence of hydrolyzed polyacrylonitrfte on phosphate and nitrogen in loessal softs, the results obtained are summarized as follows:1. The phosphorus fixation in soil is decreased and the available phosphorus is increased with the increase of the concentration of hydrolyzed polyacrylonitrile applied phosphate.2. The ammoniacal nitrogen content and the ammoniacal nitrogen released from soil are increased with the increase of the concentration of hydrolyzed polyacrylonitrile applied.更多还原