RICE SCIENCE ›› 2007, Vol. 14 ›› Issue (3): 223-228 .

• Research Paper • Previous Articles     Next Articles

Sufficiency and Deficiency Indices of Soil Available Zinc for Rice in the Alluvial Soil of the Coastal Yellow Sea

WEI Yi-chang 1, BAI You-lu 1, JIN Ji-yun 1, YANG Li-ping 1, YAO Zheng 2, XU Si-xin 2, LUO Guo-an 2, SONG Wei 3, ZHU Chun-mei 3   

  1. 1 Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2 Institute of Environmental Sciences, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; 3 Agricultural Experiment Station of Shanghai Haifeng Rice Industrial Co. Ltd., Dafeng 224153, China
  • Received:2007-01-29 Online:2007-09-28 Published:2007-09-28
  • Contact: WEI Yi-chang
  • Supported by:
    the National High-Tech Research and Development Program of China (863 Program) (Grant No. 2003AA209010) and the Key Project of Invigorating the Agriculture through Science, Technology and Education, Shanghai Municipal Agriculture Commission [Grant No. NKGZ(2005) No. 8-10].

Abstract: To determine the sufficiency and deficiency indices of soil available Zn by the Agro Services International (ASI) method (ASI-Zn) for Zn fertilizer recommendation in rice production in the alluvial soil of the coastal Yellow Sea, the relationship between relative rice yield and soil available ASI-Zn concentration was analyzed from a ten-field experiment with various soil test classes ranging from low to high fertility in 2005 and 2006, and nine Zn fertilizer application rates (0, 7.5, 15, 22.5, 30, 37.5, 45, 52.5 and 60 kg Zn/ha) arranged at random with three replications in each field. There was a significant quadratic relationship between soil available ASI-Zn and rice yield, and a significant linear relationship between soil available ASI-Zn concentration and Zn fertilization rate. For rice variety Wuyujing 3, soil available ASI-Zn was deficient when the value was at lower than 1 mg Zn/L, low at 1 to 2 mg Zn/L, sufficient at 1 to 2 mg Zn/L, excessive at higher than 7.5 mg Zn/L. Thus, Zn fertilizer recommendation could be done according to the sufficiency and deficiency indices of soil ASI-Zn. For most of alluvial soils of the coastal Yellow Sea in the study, the available ASI-Zn was lower than 1 mg Zn/L, and then the optimum application rate of Zn fertilizer was about 20 kg Zn/ha.

Key words: Agro Services International method, coastal alluvial soil, rice, soil available zinc, sufficiency index, deficiency index, fertilizer recommendation, yield