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| Effect of Inorganic Substrate Ratio and Fertilization Levels of Biogas Residue
on Growth of Seedling-edible Chinese Cabbage in Soilless Cultivation |
| YANG Jing-hua1，WU Zhan-hui2，LIU Ming-chi2，LI Ming1* |
| （1College of Horticulture， Hebei Agricultural University， Baoding 071001， Hebei， China； 2Beijing Vegetable Research Center，Beijing Academy of Agriculture and Forestry Sciences，Key Laboratory of Urban Agriculture（North），Ministry of Agriculture， Beijing 100097， China） |
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Abstract Using biogas residue whose contents of N，P and K nutrient is pre-adjusted as fertilizer
in compound substrate comprising perlite and vermiculite，this experiment studies the effects of 2
substrate ratios and 3 fertilization levels of biogas residue on the growth，yield and quality of seedlingedible
Chinese cabbage〔Brassica campestris L. ssp. pekinensis（Lour）Olsson〕‘Jingyankuaicai’.
The results showed that the effect of substrate ratio had significant influence on its growth, the fertilizer
level of biogas residue took the second place. In the same fertilization level of biogas residue，the
morphological index，VC and soluble sugar contents，fresh and dry weight，and yield of A2（the
substrate ratio of 1 perlite and 2 vermiculite）are better than A1（the substrate ratio of 2 perlite and 1 vermiculite） basically．In the same substrate ratio cultivation，the plant height，leaf length，leaf
width，leaf number，fresh and dry weight，yield and nitrate content were improved with the increasing
of biogas residue content，but the difference between 36.6 g per plant fertilization of biogas residue and
44.0 g is not significant，except leaf width and nitrate content. Collectively，these results indicated
that‘Jingyankuaicai’ grew stronger with higher yield and better quality with the substrate ratio of 1
perlite and 2 vermiculite，and 36.6 g per plant fertilization of biogas residue.
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Received: 13 September 2012
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