The paper studied on the relationship between maize straw decomposition and decomposition time, and on the effects of maize straw content added on dynamic changes of soil enzyme activity and soil organic matter mass fraction in calcareous cinnamon soil. Results showed that maize straw decom- position quantity increased with incubation time extended after maize straw added into soil, and the decomposition quantity was reached 45% when the incubation time was 45th day, but it was signifi- cantly decreased after 45th day. Before 60 days of decomposition, the decompose rates of routine maize straw added quantity treatment were less than those of doubled maize straw treatment, but de- composition rates were no significant different after 60th day. And the maize straw decomposition rate decreased with incubation extended. The soil catalase activity was increased firstly and then de- creased, and increased finally during the process of incubation, but soil catalase activity was no signif- icant different among different straw quantity added treatments. The soil alkaline phosphatase activity was increased with added straw content increased, and it also increased with incubated time extended.The soil organic matter and labile organic matter mass fraction was increased with incubated time ex- tended and straw quantity added increased.
Acta Agriculturae Boreali-occidentalis Sinica
Soil enzyme activity
Soil organic matter
Labile organic matter