Preparation of different light substrates from the processing residues of Camellia oleifera and their effects on seedling cultivation

doi:10.14088/j.cnki.issn0439-8114.2025.04.014

Abstract

Abstract: The processing residues of Camellia oleifera were used for composting and fermentation. Then the mature organic fertilizer was mixed with lightweight additives to prepare eight different lightweight substrates. The effects of these lightweight substrates on the morphological indicators of seedlings were studied by the seeding test of C. oleifera. Finally, the seedling effects of eight lightweight substrate treatments were comprehensively evaluated by factor analysis, and the optimal lightweight substrate formula was selected. The results showed that after nearly one year of seedling nursery, the seedling survival rate, seedling height, ground diameter and leaf area of lightweight substrates C₁[50% organic fertilizer(fermented by 30% seed cake of C. oleifera)+10% perlite +25% coir pith+15% pine needles] were the highest, which were higher than those of CK. The top three in terms of biomass were C₁, C₂[40% organic fertilizer (fermented by 30% seed cake of C. oleifera)+10% perlite+20% coir pith+10% pine needles +20% peat] and D₁[50% organic fertilizer (fermented by 50% seed cake of C. oleifera)+10% perlite+25% coir pith+15% pine needles]. The material accumulation of C₁ was higher than that of the CK. The root morphology indexes of C. oleifera seedlings showed that the total root length and the total root surface area of C₁ were the largest, and these two indexes of C₂ and D₁ were slightly lower than C₁. These three light substrate treatments showed no significant difference in the total root length and the total root surface area compared to CK. The root density of D₁ was the highest, followed by C₁. The root density of all treatments was lower than that of CK. The comprehensive score of the growth index of C. oleifera seedlings cultivated by C₁ was the highest, which was better than that of control and other lightweight substrates. It could be seen that the processing residues of C. oleifera could be used as the main material for the preparation of lightweight substrates after mixed fermentation according to a certain proportion.

Key words: Camellia oleifera, processing residues, composting fermentation, light substrate, seedling cultivation

CLC Number:

S794.4
X712

LI Hui, ZHANG Ming-gang, WEI Ying-ying. Preparation of different light substrates from the processing residues of Camellia oleifera and their effects on seedling cultivation[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(4): 77-83.

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