Effect of Slow-release Fertilizer Loading on Growth and N, P Accumulation of Container-growing Seedlings for Three Precious Tree Species

XIAO Yao; CHU Xiu-li; WANG Xiu-hua; ZHANG Dong-bei; YE Ding-wen; ZHOU Zhi-chun

Container nursing is a highly efficient cultivation measures that can significantly enhance the survival rate of forestation. Compared to one-year-old container-growing seedlings, the two-years-old container-growing seedlings are better in growth and survival rate. The effect of slow-release fertilizer(SRF) loading on growth, root development, biomass accumulation and allocation and N, P accumulations of Taxus wallichiana var. mairei, Phoebe chekiangensis and Cinnamomum chekiangense were systematically studied. The results are as follows.(1) The maximum ground diameter of T. wallichiana var. mairei appeared at 1.5 kg·m-3 of the SRF treatment. The 2.5 kg·m-3 SRF treatment could effectively promote seedling height of C. chekiangense, and SRF had significant effects on T. wallichiana var. mairei's leaf, root and total biomass accumulation.(2) The root volume, length and surface of both the T. wallichiana var. mairei and C. chekiangense reached the maximum values under the treatment of 3.5 kg·m-3 SRF, while the 2.5 kg·m-3 SRF could meet the demand of P. chekiangensis' growth in root volume and root surface area.(3) The N accumulation of the 3 kinds of seedlings benefited from 3.5 kg·m-3 SRF. However, the lower SRF was good for the construction of P reserves of P. chekiangensis. Apparently, increasing concent of nutrients would promote the growth and nutrient accumulation of seedlings, exceeding concent of nutrients not only limited the growth but also led to redistribution of nutrients. According to the results, the optimum fertilizing dose of N was 1.67g per plant for these three kinds of seedlings, and it was best to fertilize phosphorus at 0.74 g per plant to T. wallichiana var. mairei and C. chekiangense, respectively,while 0.32 g per plant should be better for P. chekiangensis.

1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding of Zhejiang Province, Hangzhou 311400, Zhejiang, China

2. Experimental Forest Farm of Qingyuan County, Zhejiang Province, Qingyuan 323800, Zhejiang, China

Received Date: 2015-03-20

Abstract: Container nursing is a highly efficient cultivation measures that can significantly enhance the survival rate of forestation. Compared to one-year-old container-growing seedlings, the two-years-old container-growing seedlings are better in growth and survival rate. The effect of slow-release fertilizer(SRF) loading on growth, root development, biomass accumulation and allocation and N, P accumulations of Taxus wallichiana var. mairei, Phoebe chekiangensis and Cinnamomum chekiangense were systematically studied. The results are as follows.(1) The maximum ground diameter of T. wallichiana var. mairei appeared at 1.5 kg·m-3 of the SRF treatment. The 2.5 kg·m-3 SRF treatment could effectively promote seedling height of C. chekiangense, and SRF had significant effects on T. wallichiana var. mairei's leaf, root and total biomass accumulation.(2) The root volume, length and surface of both the T. wallichiana var. mairei and C. chekiangense reached the maximum values under the treatment of 3.5 kg·m-3 SRF, while the 2.5 kg·m-3 SRF could meet the demand of P. chekiangensis' growth in root volume and root surface area.(3) The N accumulation of the 3 kinds of seedlings benefited from 3.5 kg·m-3 SRF. However, the lower SRF was good for the construction of P reserves of P. chekiangensis. Apparently, increasing concent of nutrients would promote the growth and nutrient accumulation of seedlings, exceeding concent of nutrients not only limited the growth but also led to redistribution of nutrients. According to the results, the optimum fertilizing dose of N was 1.67g per plant for these three kinds of seedlings, and it was best to fertilize phosphorus at 0.74 g per plant to T. wallichiana var. mairei and C. chekiangense, respectively,while 0.32 g per plant should be better for P. chekiangensis.

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Effect of Slow-release Fertilizer Loading on Growth and N, P Accumulation of Container-growing Seedlings for Three Precious Tree Species

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