Chinese Journal of Agrometeorology ›› 2014, Vol. 35 ›› Issue (04): 477-481.doi: 10.3969/j.issn.1000-6362.2014.04.018

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Relationship Between Canopy Broadband Albedo and Growth Status of Wheat

LI Ying xue，LI Jia jia，ZUO Chen，ZHENG Wen qi，CHEN Yi fu，TIAN Xiao yu，WANG Tian yu，JIN Lin xue   

  1. 1Jiangsu Key Laboratory of Agricultural Meteorology，Nanjing University of Information Science and Technology，Nanjing210044，China;2College of Applied Meteorology，Nanjing University of Information Science and Technology，Nanjing210044;3Inner Mongolia Ecological and Agricultural Meteorological Center，Hohhot010051
  • Received:2013-10-31 Online:2014-08-20 Published:2015-02-11

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Abstract: The field experiment was conducted to analyze the relationship between wheat canopy broadband albedo and wheat growth status，using ASD Remote Cosine Receptor（RCR）.Coverage index，dry matter，nitrogen content and SPAD were measured.The results showed that there was significantly positively correlation（r=0.74，P<0.01）between  canopy albedo and the leaf area index（LAI）.The canopy albedo was significantly correlation with NDVI and EVI，respectively（P<0.05）;Dry matter，nitrogen content in leaf and stem were markedly related to canopy albedo（P<0.01）and the determination coefficient were 0.71，0.81 and 0.60，respectively.Correlation between albedo and SPAD value was fitted by using piecewise linear function，and their R2 was 0.53 and 0.62，respectively.The results indicated that wheat canopy albedo was closely associated with crop growth status，and thus it was feasible to monitoring wheat growth characteristics by using the broadband albedo.

Key words: Wheat, Canopy albedo, Growth status, LAINitrogen content