桑园土壤—桑叶—蚕茧系统硫素相关规律研究
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* 江苏省博士后研究基金;国家自然科学基金(49771051)资助


RELATIONS OF SULFUR CONTENTS IN MULBERRY LEAVES AND SILKWORM COCOON WITH SULFUR NUTRIENT IN TYPICAL MULBERRY GARDEN SOIL
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    摘要:

    采用典型地区桑园面上调查取样和实验室分析相结合的研究方法对长江中下游地区典型桑园的硫素状况进行研究。结果表明:表土(0~20cm)有效硫含量为2.51~87.73mgkg-1(均值18.34±15.25mgkg-1),底土有效硫含量比表土有所增加,二者极显著正相关。缺硫土样占55.77%,以皖、赣、鄂、闽等省红砂岩、花岗岩母质形成的土壤为典型缺硫土壤,其次为赣、湘、苏的河流冲积物母质土壤。桑园土壤有效硫含量与桑叶全硫含量呈极显著二次曲线相关(R2=0.1773**,n=52,a<0);桑叶全硫含量与茧层全硫含量呈显著二次曲线相关(R2=0.2101,n=26,a<0)、与蛹全硫含量呈极显著直线正相关(R2=0.2515**,n=27)。高产桑园土壤有效硫含量及桑叶、茧层、蛹、蚕沙全硫含量均比低产桑园高。

    Abstract:

    The available S content,as measured with Ca(H2PO4)2 extraction and ICP-AES,in topsoils (0~20cm)of mulberry gardens in the area of the middle and lower reaches of the Yangtze River was found to be 2.51~87.73mg kg-1)(Mean SE=18.34±15.25mg kg-1 ).About 55.77% of the mulberry garden topsoils in six provinces of Jiangxi,Anhui,Hubai,Hunan,Jiangsu and Fujian have an available sulfur content below the critical value.The available sulfur content in the mulberry garden topsoil was commonly found to be lower that of the subsoil.Significant two-power function correlation was found between the available sulfur content in soil of mulberry gardens and the total sulfur content of mulberry leaves(Y=-0.001x2+0.017 9x+1.791 9,R2=8.1773**,N=52).The curvilinear correlation(two-power function relationship)between sulfur contents in mul-berry leaves and cocoon shel was significant(Y=-0.694 2x2+2.996x-1.542 3,R2=0.210 1,n=26).Sulfur concentration in cocoon shel,pupa and silkworm excrement from high-yielding mulberry gardens was higher than that from low-yielding mulberry gardens,respectively.

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赵言文,曹志洪,胡正义,刘勤,张新,徐成凯.桑园土壤—桑叶—蚕茧系统硫素相关规律研究[J].土壤学报,2002,39(1):105-112. DOI:10.11766/trxb200003300115 Zhao Yan-wen, Cao Zhi-hong, Hu Zheng-yi, Liu Qin, Zhang Xin, Xu Cheng-kai. RELATIONS OF SULFUR CONTENTS IN MULBERRY LEAVES AND SILKWORM COCOON WITH SULFUR NUTRIENT IN TYPICAL MULBERRY GARDEN SOIL[J]. Acta Pedologica Sinica,2002,39(1):105-112.

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  • 收稿日期:2000-03-30
  • 最后修改日期:2000-11-15
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  • 在线发布日期: 2013-02-25
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