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Effect of Substrate Ratio and Slow-release Fertilizer Dose on the Growth of Containerized Cyclobalanopsis gilva Seedlings

  • Received Date: 2014-06-10
  • In factorial experiment design, one-year-old non woven fabric containerized Cyclobalanopsis gilva seedlings cultivated with light substrate were used to study the effect of different substrate ratios and varied doses of slow-release fertilizer on the growth and root trait development, It is aimed to select the optimum scheme about substrate ratio and fertilizer doses for the seedlings. The results showed that the growth traits of the containerized seedlings took an obvious effect on the substrate ratio and slow-release fertilizer doses, while the effect of fertilizer on root growth was not enough to be noticed. The ground diameter, biomass and root index showed a significantly increase at first and then decreased along with the increase of peat proportion in the matrix. When the proportion of peat reached 60%, the ground diameter, biomass and root characteristics reached the maximum. At the same time, the seedling's height, biomass and root volume increased at first, and then decreased with the increasing slow-release fertilizer doses. As soon as applying slow-release fertilizer at doses of 2.5 kg·m-3, the corresponding parameters value reached to the largest and significantly greater than that of other doses of slow-release fertilizer. However, the effect of slow-release fertilizer on the root morphology indexes such as root length, root surface area and average diameter was not obvious. There was no significant difference in the root traits among different doses of slow-release fertilizers. Based on two factors' effect of matrix ratio and slow-release fertilizer doses and their interaction effects, the optimum cultivation scheme and other four alternative programs for one-year-old containerized C. gilva seedlings were selected by fuzzy mathematics method. The optimal scheme for the seedlings is that volume ratio of peat to bran in substrate is 6: 4 and with 2.5 kg slow-release fertilizer (Apex) per cubic metre matrix.
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Effect of Substrate Ratio and Slow-release Fertilizer Dose on the Growth of Containerized Cyclobalanopsis gilva Seedlings

  • 1. Experimental Forest Farm of Qingyuan County, Zhejiang Province, Qingyuan 323800, Zhejiang, China
  • 2. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China

Abstract: In factorial experiment design, one-year-old non woven fabric containerized Cyclobalanopsis gilva seedlings cultivated with light substrate were used to study the effect of different substrate ratios and varied doses of slow-release fertilizer on the growth and root trait development, It is aimed to select the optimum scheme about substrate ratio and fertilizer doses for the seedlings. The results showed that the growth traits of the containerized seedlings took an obvious effect on the substrate ratio and slow-release fertilizer doses, while the effect of fertilizer on root growth was not enough to be noticed. The ground diameter, biomass and root index showed a significantly increase at first and then decreased along with the increase of peat proportion in the matrix. When the proportion of peat reached 60%, the ground diameter, biomass and root characteristics reached the maximum. At the same time, the seedling's height, biomass and root volume increased at first, and then decreased with the increasing slow-release fertilizer doses. As soon as applying slow-release fertilizer at doses of 2.5 kg·m-3, the corresponding parameters value reached to the largest and significantly greater than that of other doses of slow-release fertilizer. However, the effect of slow-release fertilizer on the root morphology indexes such as root length, root surface area and average diameter was not obvious. There was no significant difference in the root traits among different doses of slow-release fertilizers. Based on two factors' effect of matrix ratio and slow-release fertilizer doses and their interaction effects, the optimum cultivation scheme and other four alternative programs for one-year-old containerized C. gilva seedlings were selected by fuzzy mathematics method. The optimal scheme for the seedlings is that volume ratio of peat to bran in substrate is 6: 4 and with 2.5 kg slow-release fertilizer (Apex) per cubic metre matrix.

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