Effects of Mushroom Residue Compound Substrate on Tomato Seedling Quality

Taking tomato variety‘Fen Guo Peng Guan’as test material,≤3 mm,≤5 mm two different particle sizes of mushroom residue and vermiculite were mixed in different proportions,a total of12 treatments with the ratio of peat vermiculite 2:1 as the control,tomato seedling test were carried out in order to explore the suitable compound substrate of grain size mushroom residue for tomato factory seedling.The results showed that in the same particle size of mushroom residue,with the increased proportion of mixed vermiculite,the total porosity,aeration porosity,bulk density,pH,EC value of the treatment base material was negatively correlated with the vermiculite content.Water holding porosity were positively correlated with vermiculite content.The growth index of tomato seedlings under the same particle size substrate treatment,with the increasing of vermiculite content,first increased and then decreased.Among them,when the volume ratio of mushroom residue with a particle size of ≤5 mm to vermiculite was 3:2,it was S8 treatment,which was the best seedling substrate formula for tomato cultivation.At 49 days,the growth indicators of the seedlings reached8.896 g fresh weight,0.954 g dry weight,22.07 cm plant height,and 4.90 mm stem diameter.Followed by S2,S3,S7 treatments followed by other treatments.