The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

 
       
         
    STUDIA BIOLOGIA - Issue no. 2 / 2000  
         
  Article:   PHOSPHATASE ACTIVITIES IN A BROWN LUVIC SOIL.

Authors:  ALINA SAMUEL, ŞTEFAN KISS, MARIA ŞANDOR.
 
       
         
  Abstract:  Phosphatase (phosphomonoesterase) activities were determined in the 020-, 2040- and 4060-cm layers of a brown luvic soil submitted to a complex tillage (no-till and conventional tillage), crop rotation (2- and 6-crop rotations) and fertilisation [mineral (NP) fertilisation and farmyard-manuring] experiment. It was found that the activities decreased in the order: phosphatase activity measured in unbuffered reaction mixtures > acid phosphatase activity > alkaline phosphatase activity. Each activity decreased with increasing sampling depth. No-till in comparison with conventional tillage resulted in significantly higher soil phosphatase activities in the 020-cm layer and in significantly lower activities in the deeper layers. The soil under maize or wheat was more phosphatase-active in the 6- than in the 2-crop rotation. In the 2-crop rotation higher soil phosphatase activities were recorded under wheat than under maize. Farmyard-manuring of maize in com-parison with its mineral (NP) fertilisation led to a significant increase in each activity. The enzymatic indicators of soil quality calculated from the values of phosphatase activities determined in the plots of the 6-crop rotation showed the order: farmyard-manured maize > minerally fertilised (m.f.) soybean > m.f. clover > m.f. maize (plot 4) > m.f. wheat > m.f. maize (plot 1). This order means that by determination of phosphatase activities valuable information can be obtained regarding fertility status of soils.  
         
     
         
         
      Back to previous page