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Journal of Agriculture ›› 2023, Vol. 13 ›› Issue (4): 79-83.doi: 10.11923/j.issn.2095-4050.cjas2022-0030

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Effects of Spraying Different Foliar Fertilizers on the Growth and Photosynthetic Characteristics of Eggplant (Solanum melongena L.) Seedlings

GU Duanyin(), JIAO Juan, YAN Weiqiang, CHEN Zhen, LIU Zhongliang, GAO Junjie()   

  1. Tai'an Academy of Agricultural Sciences, Tai'an 271000, Shandong, China
  • Received:2022-03-10 Revised:2022-04-23 Online:2023-04-20 Published:2023-04-18

Abstract:

The effects of different foliar fertilizers on eggplant seedlings’ growth, development and photosynthesis were determined by taking ‘Jingqie Heilongwang’ eggplant as the test material. The fertilizers were sprayed on the front and back sides of the leaves at three true leaf stage, taking water as control (CK), conventional foliar fertilizer (0.1% urea+0.2% potassium dihydrogen phosphate) as T1, 0.1 g/L and 0.05 g/L humic acid as T2 and T3, 0.03 g/L and 0.015 g/L compound organic acid as T4 and T5. The results showed that compared with CK, the eggplant plant seedling height, leaf area growth and number of leaves were promoted by spraying conventional foliar fertilizer, humic acid and compound organic acid. The increasing effect of T3 and T5 treatments were the best. T1-T5 treatments promoted the dry matter accumulation of eggplant seedlings, and T2 was the best. The chlorophyll a content increased significantly under T3 and T5 treatments, which was 32.6% and 33.7% higher than that of CK respectively. Spraying humic acid increased the content of chlorophyll b, and spraying compound organic acid increased the content of carotenoid.

Key words: foliar fertilizer, eggplant, seedling, photosynthetic characteristics, humic acid, effect