Studying the Sensibility of Soil Particulate Organic Matters in Response to Changes of Prangos Uloptera DC Stands in Mountain Rangelands

Abstract

In evaluating of affecting the kind of Prangos uloptra on components of soil particulate
organic matters and spreading of aggregates, mountain range lands were selected as
Khangah- Sorkh of Urmia. Soil samples from 0-15 cm and 15-3 0 cm depth was
analyzed. So, two adjacent places with Prangos Uloptra stands dominance were
detected and in each place 4 key land were identified and soil samples were collected.
Particulate organic matter C (POM-C) and (POM-N), macro and micro aggregates were
analyzed. Variance analyze results had shown that all of the analyzed factors were
increased in the effect of increasing attendant diversity with Prangos uloptra stands in
the second sampling place expect for macro-aggregates percentages. (POM-C), (POMN), C with macro-aggregates and micro-aggregates were affected significantly by high
plant diversity with Prangos uloptra stands that were signed in the second sampling
place. These results accented the early appearance of managing changes in the
components of N and unstable C and augmented the sensibility of soil particulate
aggregates in response to plant managing changes of covering. Accordingly, having
the information based on time changes of soil particulate aggregates components and
spreading of aggregates are useful for managing process of range lands ecosystems.