Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Chine → 2016 → Effects of Precipitation Change on Soil Labile N Pools and Net N Mineralization in Semiarid Grassland of Inner Mongolia

Shanxi Agricultural University (2016)

Effects of Precipitation Change on Soil Labile N Pools and Net N Mineralization in Semiarid Grassland of Inner Mongolia

罗玉坤

Titre : Effects of Precipitation Change on Soil Labile N Pools and Net N Mineralization in Semiarid Grassland of Inner Mongolia

Auteur : 罗玉坤

Grade : Master’s Theses 2016

Université : Shanxi Agricultural University

Résumé
Currently, it’s not certain to make sure that how the precipitation change affects the semiarid steppe ecosystem.To study the impact of changes in precipitation quantity and precipitation pattern on ecosystem functions in Inner Mongolian semiarid grassland, we set two different manually controlled experiments about different patterns of precipitation quantity and precipitation distribution in Xilinhot, Inner Mongolia, including rainout shelters to manipulate precipitation experiment platform in Xiwuqi(reduced 30%(P-30%) and 60%(P-60%) growing precipitation, control (CK) and increased 30%(P+30%) and 60% (P+60%) growing precipitation and increased 30%(P+30%) and 60%(P+60%) growing precipitation once in the beginning of every month) and rainout shelters controlling growing season precipitation quantity and patterns experiment platform in Inner Mongolia Grassland Ecosystems Research Station, Chinese Academy of Science (precipitation quantity experiments:100 mm、150 mm、200 mm、300 mm、 350 mm、400 mm、450 mm、500 mm growing precipitation ; precipitation patterns experiments:275 mm growing precipitation distribution at the amount for early-to middle-growing season was 1:1、1:2、1:4、 1:8 ; extreme precipitation patterns experiments:100 mm and 500 mm growing precipitation distribution at the amount for early-to middle-growing season was 1:1 and 1:8). During the growing season we controlled the precipitation quantity and precipitation patterns to study the variation of soil water content, grassland productivity, soil labile N pools and soil net N mineralization rate of semiarid steppe ecosystem in Inner Mongolia.(

Mots clés : Grassland ecosystem in Inner Mongolia; Climatic change; Net N mineralization; Precipitation quantity and patterns; Grassland Productivity; Soil water

Présentation (CNKI)

Page publiée le 18 juin 2017