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Xinjiang Agricultural University (2008)

Element Characteristic of Soil-plant-beetle and the Interaction in the Desert Area

王晶; Wang Jing

Titre : Element Characteristic of Soil-plant-beetle and the Interaction in the Desert Area

Auteur : 王晶; Wang Jing

Grade : Master’s Theses 2008

Université : Xinjiang Agricultural University

Résumé
Different vertical typical landscape types, including Gurbantunggut Desert, the Desert edge regional and desert - Oasis ecotone areas, were choosen as the research area in the southern margin of Junggar Basin in Xinjiang, by sampling with the association of large landscape and micro-environment. In order to investigate the soil moisture, nutrients, ion and vegetation cover in different landscape and the micro-environment. Discuss the association between soil and vegetation. Simultaneously, applied Ecological Stoichiometry to research P transfer between soil-plant-beetle in desert area .The results showed that :There are significant differences (P <0.05) of vegetation coverage, soil moisture, soil nutrient , ion content between different landscapes is caused of different soil property, that represent desert - oasis ecotone areas > desert edge>desert hinterland. The relationship analysis indicates that in the same soil property, vegetation coverage between soil organic matter and soil total nitrogen exist a significantly positive linear relationship.Plant leaf N/P in xinjiang desert area is 14.184, which was significantly higher than global averages (11.8 and 11). Plant growth in xinjiang was more limited by P than other regions.We show that variation in desert soil P availability is linked to abundance of an insect herbivore (Julodis varioloris Pall) through the influence of soil P on the C:P ratio of the host plant (Haloxylon ammodendron). Low P availability increases C : P ratio of leaves, leading to a decline inbody P, RNA and abundance of Julodis varioloris Pall. There is a significantly positive linear association between soil, plant and Julodis varioloris

Mots clés : soil organic matter; total nitrogen; total phosphorus; spatial heterogeneity; C:N:P; K+、Ca2+、Na+、Mg2+; Ecological Stoichiometry; RNA;

Présentation (CNKI)

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