ACTA AGRICULTURAE BOREALI-SINICA ›› 2015, Vol. 30 ›› Issue (2): 232-238. doi: 10.7668/hbnxb.2015.02.039

Special Issue: Soil fertilizer

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Effect of Irrigation,Fertilization and Straw Incorporation on Soil Potassium Leaching in Vegetable Greenhouse

CHEN Shuo1, YAN Zheng-juan2, FAN Zhao-bo2, CHEN Qing2, LI Zhi-fang1   

  1. 1. College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China;
    2. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
  • Received:2015-01-17 Published:2015-04-28

Abstract: Excessive inputs of water and fertilizers under conventional greenhouse vegetable production have resulted in waste of potassium (K) resource and decrease of fruit quality.A field experiment was conducted in a greenhouse tomato double-cropping system to monitor the annual leaching dynamic of K in different soil depth and investigate the effects of management modes of water and fertilizer, and straw incorporation on K leaching.Results showed that K surplus was 394 kg/ha per season in fertigation treatment, which was much lower than that in conventional management (application of fertilizer with flooding irrigation).Compared to conventional management, fertigation decreased the accumulation of available K in the 0-60 cm soil layer and the leaching of K.Mean seasonal K leaching were 15.9, 4.2 kg/ha under fertigation system, while that were 26.9, 16.9 kg/ha under conventional management system in 50, 90 cm soil depth, respectively.Excessive inputs of water and fertilizers in conventional management system significantly contribute to the leaching of K.Straw incorporation decreased the content of soil available potassium in surface soil and increased the leaching of K in conventional management system.

Key words: Flooding irrigation, Drip irrigation, Straw incorporation, Potassium leaching, Vegetable greenhouse

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Cite this article

CHEN Shuo, YAN Zheng-juan, FAN Zhao-bo, CHEN Qing, LI Zhi-fang. Effect of Irrigation,Fertilization and Straw Incorporation on Soil Potassium Leaching in Vegetable Greenhouse[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(2): 232-238. doi: 10.7668/hbnxb.2015.02.039.

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