Dersleri yüzünden oldukça stresli bir ruh haline sikiş hikayeleri bürünüp özel matematik dersinden önce rahatlayabilmek için amatör pornolar kendisini yatak odasına kapatan genç adam telefonundan porno resimleri açtığı porno filmini keyifle seyir ederek yatağını mobil porno okşar ruh dinlendirici olduğunu iddia ettikleri özel sex resim bir masaj salonunda çalışan genç masör hem sağlık hem de huzur sikiş için gelip masaj yaptıracak olan kadını gördüğünde porn nutku tutulur tüm gün boyu seksi lezbiyenleri sikiş dikizleyerek onları en savunmasız anlarında fotoğraflayan azılı erkek lavaboya geçerek fotoğraflara bakıp koca yarağını keyifle okşamaya başlar
Reach Us +44 3308186230

GET THE APP

The Field Measurement Of Surface Soil Hydraulic Properties In Artificial Revegetated Sand Area Established At Different Years, Northwest China | 83548
ISSN: 2157-7625

Journal of Ecosystem & Ecography
Open Access

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
Google Scholar citation report
Journal of Ecosystem & Ecography peer review process verified at publons
Indexed In
  • CAS Source Index (CASSI)
  • Index Copernicus
  • Google Scholar
  • Sherpa Romeo
  • Online Access to Research in the Environment (OARE)
  • Open J Gate
  • Genamics JournalSeek
  • Ulrich's Periodicals Directory
  • Access to Global Online Research in Agriculture (AGORA)
  • Electronic Journals Library
  • RefSeek
  • Hamdard University
  • EBSCO A-Z
  • OCLC- WorldCat
  • SWB online catalog
  • Virtual Library of Biology (vifabio)
  • Publons
  • Geneva Foundation for Medical Education and Research
  • Euro Pub
Share This Page

The field measurement of surface soil hydraulic properties in artificial revegetated sand area established at different years, Northwest China

World Conference on Ecology

Yanxia Pan, Xinping Wang, Rui Hu and Yafeng Zhang

Chinese Academy of Sciences, China

Posters & Accepted Abstracts: J Ecosyst Ecography

DOI: 10.4172/2157-7625-C1-033

Abstract
Water condition is a key factor improving the ecological environment in desert area, the redistribution processes of precipitation can be precisely delineated with proper sets of soil hydraulic properties derived from in situ experiments. The establishment of artificial revegetation especially the colonization of biological soil crusts would change the soil surface hydraulic properties, further would influence the water condition this area. Hence, the objective of this study was to investigate the effect of artificial revegetation establishment time on soil surface infiltration characteristics, sorptivity, hydraulic conductivity and soil pore contribution rate in northwest China. The experiment was performed at four artificial revegetation sample plots of Shapotou desert area established in 1956, 1964, 1981 and 1987 year, respectively. Correlated hydraulic properties were measured in May of 2009 with tension infiltrometers. The results indicated that thirty years later after artificial revegetation was planted, the soil cumulative infiltration amount, initial infiltration rate, stability infiltration rate, saturated hydraulic conductivity, α value, soil sorptivity all reduced gradually with the continue increase of sand-fixation time, while the time achieving stable infiltration increased with increasing sandfixation time due to the colonization and development of biological soil crusts. Compared to the reference values, Philip formula was the most appropriate calculation methods of soil sorptivity in experiment area. The soil surface porosity distribution is more homogeneous with further increase of sand-fixation time thirty years later after artificially revegetation established. Revegetation changed the contribution rate distribution of different class pore to water flow, which was more uneven with the increase of sand-fixation time. The contribution rate of macropore to water flow is significant greater in 1956 year revegetation area than other revegetation areas (p<0.01). This study may provide valuable information for the effective management of water resources at wide artificial revegetation desert area. panyanxia@lzb.ac.cn
Biography
Relevant Topics

http://sacs17.amberton.edu/

Top