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Effects of fertilizer application on greenhouse vegetable yield: A case study of Shouguang City.

LIU Ping1,2, LI Yan1,2, JIANG Li-hua1, LIU Zhao-hui2,3, GAO Xin-hao3, LIN Hai-tao1, ZHENG Fu-li1, SHI Jing1   

  1. (1Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji’nan 250100, China; 2Key Laboratory of AgroEnvironment in HuangHuaiHai Plain, Ministry of Agriculture, Ji’nan 250100, China; 3Shandong Academy of Agricultural Sciences, Ji’nan 250100, China)
  • Online:2014-06-18 Published:2014-06-18

Abstract: Data collected from 51 representative greenhouses of Shouguang through questionnaire survey were analyzed to investigate the effect of chemical fertilizers on vegetable yield, relationship between application of organic manure and yield, and influence factors and evolution rule of fertilizer application rate. The results showed that averages of 3338 kg N·hm-2, 1710 kg P2O5·hm-2, 3446 kg K2O·hm-2 were applied to greenhouse vegetables annually in Shouguang, 6-14 times as that in the local wheatmaize rotation system. The application rates of chemical N, P, and K fertilizers accounted for about 35%, 49% and 42% of the total input. Increasing application of chemical fertilizers had no significant effect on vegetable yields, while organic manure input significantly increased the vegetable yields. With the increase of greenhouse cultivating time, no significant changes in the input of chemical N, P, and K fertilizers were observed in greenhouse vegetable production while organic manure input decreased significantly. Differences in vegetable species, planting pattern and cultivating time of greenhouses was one of the reasons for large variations in nutrient application rate. In recent more than ten years, organic manure nutrient input increased significantly, chemical N and P fertilizer input presented a downward trend, chemical K fertilizer input increased significantly, and the N/P/K ratio became more and more reasonable in greenhouse vegetable production in Shouguang.