Study on Seedling Substrate Formulation Based on Organic Fertilizer from Domestic Sludge
In order to research and develop suitable seedling substrate based on domestic sludge organic fertilizer,the suitable kinds of domes-tic sludge organic fertilizer and the mixing ratio of organic fertilizer to perlite and vermiculite were screened through seedling tray test,providing theoretical basis and technical support for domestic sludge resource utilization.The treatments included 4 types of domestic sludge organic fertil-izers(A1,A2,A3,A4)and 4 mixing mass ratio of organic fertilizers∶perlite∶vermiculite(2∶1∶1,4∶1∶1,6∶1∶1,8∶1∶1)which were deno-ted by B1,B2,B3,B4 respectively,with commercial substrate as control and watermelon as tested crop.The results showed that both sludge or-ganic fertilizer varieties and mixing ratios had significant effect on watermelon seed germination and seedling growth.Watermelon seed germina-tion,plant height,number of leaves and SPAD were higher in A2 B3 treatment than other treatments.Also there were highly significant interaction effects between organic fertilizer varieties and mixing ratios,while the combination of A2 B3 was optimum i.e.sludge organic fertilizer A2 and its mixing ratio with perlite and vermiculite was 6∶1∶1,which can be recommended as sludge organic fertilizer seedling substrate formulation.
Sludge organic fertilizerSeedling substrateWatermelonMixing ratio
万方数据
维普
