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| Effects of Different Kitchen Waste Biogas Slurry and Its Dilution Multiples on Seed Germination of Cucumber and Radish |
| YANG Xueyan1，2，LIU Jiaqi1，LI Yanming1，CHEN Qing1，CHANG Ruixue1，2* |
| 1College of Resources and Environment，China Agricultural University，Beijing 100193，China；2Institute of Organic Recycling，China Agricultural University，Suzhou 215168，Jiangsu，China |
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Abstract In order to explore the direct applying feasibility of kitchen waste biogas slurry and its suitable concentration before application，this study compared 2 kinds of kitchen waste biogas slurry stoste （dilution multiple 0）and with dilution ratios （0，100，250，500，1 000 ），which were from Huzhou City，Zhejiang Province （biogas slurry A）and Chifeng City，Inner Mongolia （biogas slurry B）on seed germination of cucumber and radish．The results showed that the 2 kinds of kitchen waste biogas slurry stostes could inhibit the seed germination．But the inhibitory effect would be gradually vanished and changed to promoting effect along with the increase of dilution ratios．When kitchen waste biogas slurry A was diluted 100 multiples，the germ length and vigor index of radish seed were increased．When it diluted 500 multiples，the germination rate，germination potential and germination index of radish seed were increased．When it diluted 1 000 multiples，the comprehensive effects including radicle length，germ length，germination rate，germination energy，germination index and vigor index of cucumber seed were the best．When kitchen waste biogas slurry B was diluted 100 multiples，the root and shoot growth of radish seed was promoted．When it diluted 250 multiples，the germination rate，germination potential and germination index of cucumber seed were higher．When it diluted 1 000 multiples，radicle and germ growth of cucumber seed was promoted，and germination rate and germination indexes of radish seed were increased．In conclusion，direct application of kitchen waste biogas slurry can inhibit seed germination，user should choose appropriate dilution multiples according to actual needs．
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Received: 20 June 2022
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