ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (2): 144-151. doi: 10.7668/hbnxb.20190502

Special Issue: Rice Soil fertilizer

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effect of Application Period of Granular Fertilizer on Cadmium Accumulation in Rice

ZHANG Yusheng1,2, XIAO Huan1,2, WU Yongjun1,2, YANG Xiaofen1,2, WANG Zeqian1,2, WU Xiang1,2, XIANG Yanyun1,2, ZHANG Xiaoyi1,2, AO Hejun1,2   

  1. 1. College of Agronomy, Hunan Agricultural University, Changsha 410128, China;
    2. South Regional Collaborative Innovation Center for Grain and Oil in China, Changsha 410128, China
  • Received:2019-12-04 Published:2020-04-28

Abstract: The aim of the study was to explore the effects of nitrogen fertilizer application on rice cadmium accumulation in late growth stage, and provide technical support for rice cadmium reduction. A field plot experiment was conducted with hybrid rice Zhuliangyou 819 (early rice) and conventional rice Xiangwanxian 12 (late rice) as experimental materials. Grain fertilizer was applied at 20% of total nitrogen at different growth stages, including grain fertilizer at the beginning of heading stage(F1), grain fertilizer at the full heading stage(F2), grain fertilizer at the filling stage(F3), and no grain fertilizer treatment was as CK. The results showed that the application of grain fertilizer significantly increased the grain biomass of late rice, and the application of grain fertilizer at the full heading stage and the filling stage significantly increased the grain biomass of early rice. There were significant differences in reducing grain enrichment coefficient and cadmium translocation coefficient in plants between different growth stages. Cadmium content in different parts of rice was different at different growth stages. The application of grain fertilizer increased cadmium content in roots, shoot of early rice, but significantly decreased cadmium content in grains which the value represented as CK > F1 > F3 > F2. Cadmium content in roots of late rice increased significantly under the treatment of grain fertilizer at the beginning of heading stage. Cadmium content in shoot was significant higher than CK, but it decreased slightly in grain fertilization at grain filling stage. Compared with CK, the maximum reduction of cadmium content in early and late rice grains was 44.87% and 22.31% respectively. The effects of grain fertilizer application at different growth stages on cadmium content in early and late rice grains were different. Grain fertilizer application at full heading stage could significantly reduce cadmium content in early rice grains, and grain fertilizer application at grain filling stage could reduce cadmium content in late rice grains.

Key words: Rice, Grain cadmium content, Cadmium accumulation, Nitrogen fertilizer, Transport coefficient

CLC Number: 

Cite this article

ZHANG Yusheng, XIAO Huan, WU Yongjun, YANG Xiaofen, WANG Zeqian, WU Xiang, XIANG Yanyun, ZHANG Xiaoyi, AO Hejun. Effect of Application Period of Granular Fertilizer on Cadmium Accumulation in Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(2): 144-151. doi: 10.7668/hbnxb.20190502.

share this article