间作对澳洲坚果牛大力根茎叶和土壤中微量元素含量的影响

Effects of Intercropping on Medium and Trace Elements in Roots, Stems, Leaves of Macadamia integrifolia and Millettia speciosa and Soil

为了解间作对澳洲坚果(Macadamia integrifolia)和牛大力(Millettia speciosa)幼苗根、茎和叶以及土壤的中、微量元素的影响情况,探究元素转运和吸收规律,设置两种植物的单作和间作模式,研究不同模式下中、微量元素的含量、转运及富集系数变化情况。结果表明,间作对澳洲坚果和牛大力不同部位的不同元素含量具有显著影响;间作提高两种植物Ca、Zn、B和Mn总贮量。与澳洲坚果单作土壤相比,间作显著降低土壤Ca、Mg、Zn、B和Mn含量;与牛大力单作土壤相比,间作显著提高土壤Ca、Fe含量。与澳洲坚果单作相比,间作澳洲坚果总Zn富集系数显著提高,总Fe富集系数显著降低;从土壤到根的Zn、Mn转运系数均显著提高,Ca、Fe转运系数均显著降低;从根到茎的Ca、Mg、B、Fe和Mn转运系数均显著提高,Zn转运系数显著降低;从茎到叶的Ca、Mg、Zn、Fe和Mn转运系数均显著降低。与牛大力单作相比,间作牛大力总Mg、Zn和Mn富集系数均显著提高,总B、Fe富集系数均显著降低;从土壤到根的Mg、Zn转运系数均显著提高,B、Fe、Mn转运系数显著降低;从根到茎的B、Fe和Mn转运系数均显著提高,Mg、Zn转运系数均显著降低;从茎到叶的Ca、Mg、Zn、B和Mn转运系数均显著提高,Fe转运系数显著降低。

In order to understand effects of intercropping on medium and trace elements in roots, stems and leaves of Macadamia integrifolia and Millettia speciosa seedlings, and to investigate pattern of elemental transport and uptake, monoculture and intercropping modes of two plants were set up to study contents, translocation and bioconcentration factors of medium and trace elements in different modes. Results showed that intercropping had a significant effect on contents of different elements in different parts of M. integrifolia and M. speciosa.Intercropping increased total Ca, Zn, B and Mn total storages of both plants. Compared with soil from M. integrifolia monoculture,intercropping significantly reduced Ca, Mg, Zn, B and Mn contents in soil. Compared with soil from M. speciosa monoculture, intercropping significantly increased Ca and Fe contents in soil. Compared with M. integrifolia monoculture, total Zn bioconcentration factor significantly increased, and total Fe bioconcentration factor significantly reduced;translocation factors of Zn and Mn from soil to root significantly increased, and translocation factors of Ca and Fe significantly reduced;translocation factors of Ca, Mg, B, Fe and Mn from root to stem significantly increased, and Zn translocation factor significantly reduced;translocation factors of Ca, Mg, Zn, Fe and Mn from stem to leaf significantly reduced in intercropped M. integrifolia. Compared with M. speciosamonoculture, bioconcentration factors of total Mg, Zn and Mn significantly increased, andbioconcentration factorsof total B and Fe significantly reduced;translocation factors of Mg and Zn from soil to root significantly increased, and translocation factors of B, Fe and Mn significantly reduced;translocation factors of B, Fe and Mn from root to stem significantly increased, and translocation factors of Mg and Zn significantly reduced;translocation factors of Ca, Mg, Zn, B and Mn from stem to leaf significantly increased, and Fe translocation factor significantly reduced in intercropped M. speciosa.