Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (6): 1319-1326.DOI: 10.3969/j.issn.1004-1524.20240215

• Environmental Science • Previous Articles     Next Articles

Application of nitrogen fertilizer for banana based on nitrate nitrogen concentration in soil solution

HE Xinyun(), DENG Bichun, HU Qingyu, FENG Hong, GUO Yanbiao*()   

  1. College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
  • Received:2024-03-05 Online:2025-06-25 Published:2025-07-08

Abstract:

A large amount of nitrogen is required in the whole growth period of banana. Reasonable fertilization is the basis to ensure yield, increase fertilizer use efficiency and reduce environmental load. Reasonable fertilization is dependent on the quick and accurate judgment of nitrogen supply level. Plants absorb nutrients mainly from soil solution, so nutrient concentration in soil solution can reflect nutrient supply level of soil in theory. However, there are few studies focusing on fertilization scheme based on nutrient concentration in soil solution. To establish a method which could guide fertilization by monitoring nitrate nitrogen concentration in soil solution, a sand culture experiment with nutrition solution and a pot experiment with soil for banana were carried out in 2019 and 2020, respectively. Seven nitrogen concentrations (0, 35, 70, 140, 210, 280, 420 mg·L-1) were set up in the sand culture experiment, and three nitrate nitrogen concentration ranges (<70, 70-280, >280 mg·L-1) were set up in the pot experiment.The results showed that the plant height, relative chlorophyll content (SPAD value), leaf area and total dry matter weight of banana were significantly (P<0.05) higher when nitrogen concentration was 70-280 mg·L-1 than those when nitrogen concentration was lower than 70 mg·L-1 or higher than 280 mg·L-1 in the sand culture experiment. The growth of banana plant in the soil pot experiment was the best and the biomass was the largest when the concentration of nitrate nitrogen in soil solution was in the range of 70-280 mg·L-1, which was consistent with the results of sand culture experiment. Therefore, the concentration of nitrate nitrogen in soil solution in the range of 70-280 mg·L-1 could be used as a reference index for nitrogen fertilizer application at banana seedling stage.

Key words: soil solution, fertilization, nitrogen, banana

CLC Number: