The formation of soil chemistry and the development of fertility islands under plant canopies in sandy areas

作者：Rahmonov Oimahmad^*; Rzetala Martyna Anna; Rahmonov Malgorzata; Kozyreva Elena; Jagus Andrzej; Rzetala Mariusz

来源：Research Journal of Chemistry and Environment, 2011, 15(2): 823-829.

• Canopy effect
• island of fertility
• sandy areas
• soil chemistry

The processes leading to the formation of soil and fertility islands under canopies of Salix acutifolia and Pinus sylvestris are examined. The investigation involved field studies and laboratory analysis. The results show that the accumulation of nutrients is strongly linked to the plant canopies (Corg - 1.76%; Nt - 0.095) whereas, in the spaces between bushes (Corg - 0,68-1,54 %; Nt - 0,046), nutrient accumulation barely takes place. Enriched zones situated under the bush canopies, reflecting interaction between biotic and abiotic factory, are termed fertility islands.
Vegetation also Colonises the areas around tree trunks. Developing soil horizons under the canopies are termed soil islands. In these, organic horizons and sub-horizons create conditions advantageous to the development and existence of organisms which also influence the soils there. Considering the young age of the soil, and the weak differentiation of soil horizons, the organic matter that lies directly over the mineral layer plays an essential ecosystem role in the primary stages of vegetation-soil succession. Amount and quality of organic matter influence absorption capacity and cation numbers. The significance of alkaline cations (Ca(2+), Mg(2+), Na & K) in the composition of broad-leaved species leads to a decrease in soil acidity.

• 出版日期2011-6