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| Effects of Different Bio-stimulants on Quality of Eggplant Seedlings |
| LIU Xigang1，JI Tuo1，LI Zhuomeng1，LI Nan1，WEI Min1，3，4，LI Jing1，2，3*，YANG Fengjuan1，2，3* |
| 〔1College of Horticulture Science and Engineering，Shandong Agricultural University，State Key Laboratory of Crop Biology，Taian 271018，Shandong，China；2Key Laboratory of Biology and Genetic Improvement of Horticultural Crops（Huanghuai Region），Ministry of Agriculture and Rural Affairs，Taian 271018，Shandong，China；3Collaborative Innovation Center of Fruit and Vegetable，Shandong Province，Taian 271018，Shandong，China；4Scientific Observing and Experimental Station of Facility Agricultural Engineering（Huang-Huai-Hai Region），Ministry of Agriculture and Rural Affairs，Taian 271018，Shandong，China〕 |
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Abstract In order to explore the application of different bio-stimulants on eggplant seedlings industry，this paper studied the effects of 5 bio-stimulants，including humic acid，fish protein，seaweed essence，chitin and amino acid on quality of eggplant seedlings．The results showed that all 5 bio-stimulants treatments had concentration effects on eggplant seedlings plant height，stem diameter，shoot dry weight and fresh weight of above ground and below ground，root length，root surface area，root volume and root average diameter，chlorophyll a+b contents in leaf blades，and net photosynthetic rate．There was a changing tendency of first increase then decrease．The better effect of each treatment was diluting 600 times．The results of principal component analysis showed that diluted 600 times fish protein had the best effect on promoting the growth of eggplant seedlings．Compared with the contrast，sound seedling index had increased 54.12%；root length，root surface area，root volume and root average diameter had increased 74.70%，89.34%，80.70% and 26.92%，respectively；chlorophyll a+b contents and net photosynthetic rate had increased 41.26% and 45.00%．Seaweed extract and chitin had the second growth promoting effect．The sound seedling index was increased by 33.03% and 34.86%，respectively．
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Received: 12 September 2022
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