Acute and Long-Time Effects of Liming and Fertilizing on the Soil Microflora of Forest Stands : Part I: Liming of Spruce Stands Without Ground Cover

1991

S. 655-662

8 Lit. Ang.

Unselbständiges Werk

200062039

The soil pH value increased considerably after liming in spruce stands without ground cover. In this way massive development of the bacterial component of microflora was stimulated. The increased decomposition of organic matter resulted in a decrease in carbon and total nitrogen contents. The lower offer of nitrogen slowed down ammonification and also nitrification, and this lead to a decrease in the content of mineral nitrogen in soil. The effect of liming descends into the deeper soil horizons during the years of observation. These changes can easily be seen mainly in the humus horizon even after three decades. The reserve of total nitrogen was renewed on the area to which limestone and fertilizers (N,P) had been applied 28 years ago; on the same area ammonification and nitrification were more intensive, but bacterial colonization was weaker than on the intact area.