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土壤圈(英文版). 2005, (03)

Transformation Efficiency of Sulfur for a Mulberry Leaf-Silkworm Cocoon System in the Lower-Middle Reaches of the Yangtze River, ChinaEnglish Full Text

ZHAO Yan-Wen1,2, HU Zheng-Yi2, CAO Zhi-Hong2, J. D. BEATON3, A. M. HENDERSON3, M. X. FAN4 and XU Cheng-Kai2 College of Agriculture, Nanjing Agri. Univ., Key Lab. of Crop Growth Regulation, Ministry of Agri., Nanjing 210095 (China). 2 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) 3 Fernz SulFer Works Inc., P.O. Box 9, Irricana, AB. TOM 1B0 (Canada) 4 The Sulphur Institute, Washington, DC 20036 (USA)

Abstract: Cocoon samples were collected from fifty-two mulberry gardens with high, intermediate, and low silkworm cocoon productivities in the lower-middle reaches of the Yangtze River in the six China’s provinces of Jiangsu, Jiangxi, Anhui, Fujian, Hunan, and Hubei to determine the transformation efficiency of S from mulberry leaves to silkworm cocoons, and to evaluate the sulfur cycle （uptake and output） in the mulberry leaf-silkworm cocoon system with typical mulberry gardens in the lower-middle reaches of the Yangtze River in China. The transformation efficiency of sulfur （TES） from mulberry leaves into silkworm cocoons in the high-productivity mulberry gardens was significantly lower （P ＜ 0.05） than that in the low-productivity gardens. For the high-productivity mulberry gardens the TES from mulberry leaves into the cocoon shells was significantly higher （P ＜ 0.05） than that for low-yield mulberry gardens. Producing 1 kg dry cocoon in mulberry gardens required uptake of about 20 g S, however 1 kg of dry cocoon only removed about 4 g S. Therefore, recycling of these organic wastes with silkworm cultivation was important for sulfur balances.
Keywords：

mulberry leaves; silkworm cocoon; sulfur; transformation efficiency;

  • Series：

    (D) Agriculture

  • Subject：

    Silkworm and Honeybee, Wild Animal Protection

  • Classification Code：

    S88

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