Liming of forest soils: effectiveness of particle-size fractions
2002
Musil, I. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic). Lesnicka Fakulta)) | Pavlicek, V.
The paper studies the effect of a single use of a textural fraction of dolomitic limestone (5.1 t per ha) on soil reaction (pH/KCl and pH/H2O) and the content of exchangeable Ca and Mg (in the soil layer of 0-30 cm or in F, H and A horizons) during a 6-year experiment under a mature Norway spruce stand and a 4-year experiment on a clear-felled area. The increase in pH culminated in the 3rd or in the 3rd-6th year of the experiment. Maximum effects were achieved applying the fine fraction of a particle size under 1 mm. The coarse fraction of a particle size above 1 mm showed virtually negligible effects. The increase in Ca and Mg content culminated in the last 6th year of the experiment. Maximum effects were achieved applying fine fractions again. The effect of the coarse fraction was also virtually negligible. After 6 years, maximum increase in all values under study occurred in the upper narrow F horizon while the increase rapidly dropped downwards.
显示更多 [+] 显示较少 [-]