氮素浓度对无土栽培韭菜产量与硝酸盐含量的影响

doi:10.19640/j.cnki.jtau.2023.02.004

Journal of Tianjin Agricultural University ›› 2023, Vol. 30 ›› Issue (2): 18-22.doi: 10.19640/j.cnki.jtau.2023.02.004

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Effects of nitrogen concentration on yield and nitrate content of Chinese chive in soilless culture

Hua Renrui, Sun Shihai^{Corresponding Author}, Zhang Weihua, Liu Yuling, Yin Chaoqun, Zhang Meng

College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China

Received:2022-04-10 Online:2023-04-30 Published:2023-06-28

Abstract

Abstract: In order to study the effect of nitrogen concentration in nutrient solution on the yield, nitrate content, nitrogen utilization efficiency and growth of Chinese chive in soilless culture, and provide a basis for the research and development of nutrient solution formula for Chinese chive in hydroponic, the nutrient solutions with different nitrogen concentrations（6, 8, 10, 12, 14, 16 and 18 mmol/L）were used for Chinese chive cultivation respectively with perlite being used as the matrixin and the biennial plant of Chinese chive ‘Pengbao’ being used as the test material, and the growth and development of Chinese chives were observed. The results showed that the yield of Chinese chives increased significantly as the nitrogen concentration was increased, but the rate of yield increase of Chinese chives slowed down when the nitrogen concentration was more increased, which showed a significant marginal utility. The total yield was the highest when the nitrogen concentration was 16 mmol/L, which was 5 078.1 kg/667m². The nitrate content in the edible parts of Chinese chives was significantly positively correlated with the nitrogen concentration of nutrient solution, and it increased with the increase of nitrogen concentration in the range of nitrogen concentration from 6 to 18 mmol/L. The growth rate of nitrate content in Chinese chives was significantly higher than that of the yield with the increase of nitrogen concentration when the nitrogen concentration exceeded 14 mmol/L. At the same time, nitrogen fertilizer utilization rate decreased. The nitrate content of Chinese chives was lower than 1 500 mg/kg only when the nitrogen concentration was lower than 14 mmol/L. The total nitrogen content of Chinese chive plants also increased significantly with the increasing of the nitrogen concentration of nutrient solution. The optimum nitrogen concentration of the nutrient solution was 10-12 mmol/L for Chinese chive in perlite soilless culture to weigh the quality, yield and nitrogen utilization of Chinese chives comprehensively.

Key words: Chinese chive, nitrogen concentration, nitrate content, yield, soilless culture

CLC Number:

S633.3

Hua Renrui, Sun Shihai, Zhang Weihua, Liu Yuling, Yin Chaoqun, Zhang Meng. Effects of nitrogen concentration on yield and nitrate content of Chinese chive in soilless culture[J]. Journal of Tianjin Agricultural University, 2023, 30(2): 18-22.

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Effects of nitrogen concentration on yield and nitrate content of Chinese chive in soilless culture

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