The Effect Of Substrates Of Waste Materials And Container Root Control On The Growth Of Prunus Zippeliana Container Seedlings

Zhejiang native species Prunus zippeliana as the test material, effect of substrate selection and different types of container root control on Prunus zippeliana container seedlings was studied. The study not only established a scientific and rational cultivation technology system for Prunus zippeliana container seedlings, but also achieved agricultural and forestry waste recycling. This is a great significance for reducing environmental pollution. The main results are as follows:These five kinds of waste materials--shells of Carya cathayensis, sawdust; twigs and defoliation, mushroom residues, drug waste were collected, after fermentation and disinfects processing, and were mixed into 8 different light cultivation substrates according to different ratio. Determining their physical and chemical properties, compared with daily light substrates (peat and pearlite=7.5∶2.5) of cultivation container seedlings. Results showed that 8 different light cultivation substrates'bulk density, total porosity, aeration porosity, pH and Total N showed significant differences(α=0.05); water-holding porosity, A/W ratio, total P, total K(except the 6th and 7th substrates), available K showed highly significant differences(α=0.01). It is showed that each mixed substrate has good physical and chemical properties; has rich nutrient elements like total N, total P, total K and available K for container seedling cultivation.The variance analysis method analyzed 8 group substrates on Root and shoot part morphological indicators, biomass accumulation indicators, physiological indicators of Prunus zippelian seedlings. It suggested that the 2nd substrate (sawdust∶twigs and defoliation∶carya cathayensis shells∶perlite=4∶2∶3∶1) was the best substrate for Prunus zippeliana container seedlings, followed by the 1st substrate(sawdust∶twigs and defoliation∶peat∶perlite=2∶4∶2∶2) and the 3rd substrate (sawdust∶Carya cathayensis shells∶mushroom residues∶perlite=6∶2∶1∶1).Two root control containers 20cm×19cm light black non-woven bag and plastic root control container were compared with the plastic pots on the growth of Prunus zippeliana container seedlings. The results showed that both root control containers had significant effect on Prunus zippeliana container seedlings. Light black non-woven bag had significant difference on first class lateral root, root surface area and project area compared with the plastic root control container. Therefore the light non-woven bag for root control of Prunus zippeliana container seedling was better.