ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (2): 198-204. doi: 10.7668/hbnxb.201751047

Special Issue: Tomato Soil fertilizer

• Environment·Plant Protection • Previous Articles     Next Articles

Effect of Biochar and Nitrogen Application Rate on Growth and Water-Nitrogen Use Efficiency of Tomato

LIU Yanni, LÜ Haofeng, ZHAO Yiming, LIN Shan   

  1. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
  • Received:2018-12-12 Published:2019-04-28

Abstract: To explore whether the biochar application could reduce the negative effect of excessive nitrogen fertilization on tomato growth, a pot experiment was carried out using randomized block design with two factors (application rates of nitrogen and biochar) under three levels. The application rates were 100, 200,400 mg/kg of nitrogen, and 0, 2.5, 5 g/kg of biochar, respectively. The dry weight and fresh weight of stems, leaves and fruits of tomato, the amount of irrigation water and the water-nitrogen use efficiency were measured and calculated. The results demonstrated that the dry weight of stems and leaves and the accumulated irrigation water amount decreased significantly in the treatment of high nitrogen rate, compared with the treatment of low nitrogen rate.The nitrogen use efficiency decreased significantly along with the increase of N application rate. Compared with the treatment without biochar application, the use of biochar significantly increased the dry matter of leaves and fruit, the accumulated irrigation water amount and the water-nitrogen use efficiency. It suggested that the application of biochar could reduce the negative effect of excessive N fertilization on tomato growth.

Key words: Greenhouse tomato, Biochar, Nitrogen fertilizer application rate, Water-nitrogen use efficiency

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Cite this article

LIU Yanni, LÜ Haofeng, ZHAO Yiming, LIN Shan. Effect of Biochar and Nitrogen Application Rate on Growth and Water-Nitrogen Use Efficiency of Tomato[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(2): 198-204. doi: 10.7668/hbnxb.201751047.

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