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Sciences in Cold and Arid Regions ›› 2019, Vol. 11 ›› Issue (5): 371–381.doi: 10.3724/SP.J.1226.2019.00371.

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  • 收稿日期:2019-07-31 接受日期:2019-08-27 出版日期:2019-10-31 发布日期:2019-11-12

Features on N/P ratio of plants with different functional groups between two types of steppe in semi-arid area

YueDan Zhao,XingDong He(),Lei Chen,XinFeng Ding,MengQi Li,PingYi Xu,YuBao Gao   

  1. College of Life Sciences, Nankai University, Tianjin 300071, China
  • Received:2019-07-31 Accepted:2019-08-27 Online:2019-10-31 Published:2019-11-12
  • Contact: XingDong He E-mail:xingd@nankai.edu.cn

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Abstract:

The differences in nitrogen/phosphorus (N/P) ratios of different functional groups in ecology are more helpful in explaining species competition and community dynamics. Based on the functional groups of plant growth type, carbon metabolism pathway, root type and phylogenetic type, we analyzed characteristics of leaf N/P ratios of 77 species in Sanggendalai (typical grassland zone) of Zhenglan Banner, Inner Mongolia, China and 91 species in the Habahu National Nature Reserve (desertified grassland zone) in Yanchi County of Ningxia, China. The results show that the N/P ratio (16.91) of C3 plants in the desertified steppe was significantly larger than that (12.72) in the typical steppe, but there was no significant difference between the N/P ratios of C4 plants in the two zones. There was no significant difference in N/P ratios between C3 plants and C4 plants in the same zone. Similarly, the N/P ratio (16.60) of dicotyledons in desertified steppe were significantly higher than that (12.98) in typical steppe, while differences in N/P ratios between monocotyledonous plants of the two zones was not significant, and there existed no significant difference in N/P ratios between dicotyledonous and monocotyledonous plants in the same zone. The N/P ratio had significant difference between gramineous and non-gramineous plants in the typical steppe but not in the desertified steppe, but there existed no significant difference in N/P ratios among different root types of perennial herbaceous plants in the same type of steppe or between two types of steppe. Thus, different features on the N/P ratios of C3 plants and dicotyledonous plants between typical steppe and desertified steppe may lead to different growth status of plants, and the N/P ratio stoichiometric of the same plant functional group may be a foundation of the changes of a plant community.

Key words: semi-arid region, plant N/P ratio, plant functional groups, desertified steppe, typical steppe

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Site Plant community Organic matter (g/kg) Total N (g/kg) Total P (g/kg)
Habahu Artemisia ordosica community 1.884±0.193 0.169±0.015 0.094±0.007
Salix psammophila community 0.974±0.132 0.109±0.015 0.076±0.005
Sophora alopecuroides community 4.274±0.525 0.294±0.019 0.223±0.006
Stipa bungeana community 7.783±0.326 0.467±0.026 0.250±0.007
Sanggendalai S. krylovii community 11.951±0.438 0.840±0.040 0.253±0.005
Leymus chinensis community 7.950±0.725 0.530±0.040 0.201±0.011
Caragana microphylla community 7.170±0.798 0.500±0.039 0.190±0.012

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Species Site 1 Site 2 Family Life-form RST PP Phylogeny
Amaranthus tricolor * Amaranthaceae Annual C4 Dicots
Cynanchum thesioides * Asclepiadaceae Perennial Ratoon C3 Dicots
Lappula myosotis * Boraginaceae Annual C3 Dicots
Cynanchum chinense * Asclepiadaceae Perennial Ratoon C3 Dicots
C. hancockianum * Asclepiadaceae Perennial Fibrous Root C3 Dicots
Incarvillea sinensis * Bignoniaceae Annual C3 Dicots
Messerschmidia sibirica * Boraginaceae Perennial Ratoon C3 Dicots
Gypsophila davurica * * Caryophyllaceae Perennial Axial Root C3 Dicots
Silene aprica * Caryophyllaceae Annual C3 Dicots
Stellaria dichotoma * Caryophyllaceae Perennial Axial Root C3 Dicots
Corispermum mongolicum * Chenopodiaceae Annual C3 Dicots
Chenopodium acuminatum * Chenopodiaceae Annual C4 Dicots
Ch. glaucum * Chenopodiaceae Annual C4 Dicots
Kochia scoparia var. sieversiana * * Chenopodiaceae Annual C4 Dicots
K. prostrata * Chenopodiaceae shrub C4 Dicots
Suaeda glauca * Chenopodiaceae Annual C4 Dicots
Agriophyllum squarrosum * Chenopodiaceae Annual C3 Dicots
Ceratoides latens * Chenopodiaceae shrub C3 Dicots
Bassia dasyphylla * Chenopodiaceae Annual C4 Dicots
Kalidium gracile * Chenopodiaceae shrub C3 Dicots
Atriplex centralasiatica * Chenopodiaceae Annual C4 Dicots
Salsola collina * * Chenopodiaceae Annual C4 Dicots
Artemisia sieversiana * Compositae Annual C4 Dicots
A. halodendron * Compositae shrub C3 Dicots
A. frigida * * Compositae Perennial Axial Root C3 Dicots
A. ordosica * Compositae shrub C3 Dicots
A. sphaerocephala * Compositae shrub C3 Dicots
A. scoparia * * Compositae Perennial Axial Root C3 Dicots
Cirsium japonicum * Compositae Perennial Fleshy root tuber C3 Dicots
C. setosum * Compositae Perennial Axial Root C3 Dicots
Echinops gmelini * * Compositae Annual C3 Dicots
Heteropappus altaicus * * Compositae Perennial Axial Root C3 Dicots
Inula salsoloides * Compositae Perennial Axial Root C3 Dicots
Ixeris chinensis * * Compositae Perennial Axial Root C3 Dicots
Jurinea mongolica * Compositae Perennial Axial Root C3 Dicots
Mulgedium tataricum * Compositae Perennial Ratoon C3 Dicots
Saussurea runcinata * Compositae Perennial Axial Root C3 Dicots
S. amara * Compositae Perennial Axial Root C3 Dicots
Serratula centauroides * Compositae Perennial Axial Root C3 Dicots
Sonchus arvensis * Compositae Perennial Ratoon C3 Dicots
Scorzonera divaricata * * Compositae Perennial Ratoon C3 Dicots
Convolvulus arvensis * Convolvulaceae Perennial Axial Root C3 Dicots
Dontostemon dentatus * Cruciferae Annual C3 Dicots
Lepidium apetalum * Cruciferae Annual C3 Dicots
Carex korshinskyi * Cyperaceae Perennial Rhizome C3 Monocots
C. duriuscula * Cyperaceae Perennial Rhizome C3 Monocots
Scabiosa comosa * Dipsacaceae Perennial Axial Root C3 Dicots
Euphorbia fischeriana * Euphorbiaceae Perennial Axial Root C3 Dicots
E. esula * Euphorbiaceae Perennial Axial Root C3 Dicots
E. kozlovii * Euphorbiaceae Perennial Axial Root C3 Dicots
Gentiana scabra * Gentianaceae Perennial Fibrous Root C3 Dicots
G. dahurica * Gentianaceae Perennial Axial Root C3 Dicots
Erodium stephanianum * Geraniaceae Perennial Axial Root C3 Dicots
Pennisetum centrasiaticum * * Gramineae Perennial Rhizome C4 Monocots
Stipa Baicalensis * Gramineae Perennial Thick-Bunched C3 Monocots
S. bungeana * Gramineae Perennial Thick-Bunched C3 Monocots
S. tianschanica var. gobica * Gramineae Perennial Thick-Bunched C3 Monocots
S. glareosa * Gramineae Perennial Thick-Bunched C4 Monocots
S. krylovii * Gramineae Perennial Thick-Bunched C3 Monocots
S. grandis * Gramineae Perennial Thick-Bunched C3 Monocots
Agropyron cristatum * * Gramineae Perennial Bunched C3 Monocots
A. mongolicum * Gramineae Perennial Bunched C3 Monocots
Cleistogenes squarrosa * * Gramineae Perennial Bunched C4 Monocots
Calamagrostis pseudophragmites * * Gramineae Perennial Rhizome C3 Monocots
Chloris virgata * Gramineae Annual C4 Monocots
Poa sinoglauca * * Gramineae Perennial Thick-Bunched C3 Monocots
Achnatherum splendens * Gramineae Perennial Thick-Bunched C3 Monocots
Leymus secalinus * * Gramineae Perennial Rhizome C3 Monocots
L. chinensis * Gramineae Perennial Rhizome C3 Monocots
Phragmites communis * Gramineae Perennial Rhizome C3 Monocots
Psammochloa villosa * Gramineae Perennial Rhizome C3 Monocots
Setaria viridis * Gramineae Annual C4 Monocots
Achnatherum sibiricum * Gramineae Perennial Thick-Bunched C3 Monocots
Koeleria cristata * Gramineae Perennial Thick-Bunched C3 Monocots
Iris tenuifolia * * Iridaceae Perennial Thick-Bunched C3 Monocots
I. lactea * Iridaceae Perennial Thick-Bunched C3 Monocots
Amethystea caerulea * Labiatae Annual C3 Dicots
Scutellaria baicalensis * Labiatae Perennial Ratoon C3 Dicots
Phlomis mongolica * Labiatae Perennial Fleshy root tuber C3 Dicots
Ph. umbrosa * Labiatae Perennial Fleshy root tuber C3 Dicots
Thymus mongolicus * Labiatae shrub C3 Dicots
Lagochilus ilicifolius * Labiatae Perennial Axial Root C3 Dicots
Panzeria alaschanica * Labiatae Perennial Axial Root C3 Dicots
Dracocephalum moldavica * Labiatae Annual C3 Dicots
Astragalus melilotoides * Leguminosae Perennial Axial Root C3 Dicots
Caragana tibetica * Leguminosae shrub C3 Dicots
C. roborovskyii * Leguminosae shrub C3 Dicots
C. korshinskii * Leguminosae shrub C3 Dicots
C. microphylla * * Leguminosae shrub C3 Dicots
Gueldenstaedtia gansuensis * Leguminosae Perennial Axial Root C3 Dicots
Lespedeza davurica * Leguminosae shrub C3 Dicots
L. potaninii * Leguminosae shrub C3 Dicots
Hedysarum scoparium * Leguminosae shrub C3 Dicots
H. laeve * Leguminosae shrub C3 Dicots
Sophora alopecuroides * Leguminosae Perennial Ratoon C3 Dicots
Sphaerophysa salsula * Leguminosae Perennial Ratoon C3 Dicots
Oxytropis aciphylla * Leguminosae shrub C3 Dicots
Ammopiptanthus mongolicus * Leguminosae shrub C3 Dicots
Medicago * Leguminosae Perennial Axial Root C3 Dicots
Thermopsis lanceolata * * Leguminosae Perennial Ratoon C3 Dicots
Oxytropis racemosa * * Leguminosae Perennial Axial Root C3 Dicots
O. glabra * Leguminosae Perennial Axial Root C3 Dicots
Melilotus albus * Leguminosae Annual C3 Dicots
M. suaveolens * Leguminosae Annual C3 Dicots
M. officinalis * Leguminosae Perennial Axial Root C3 Dicots
Melilotoides ruthenica * Leguminosae Perennial Axial Root C3 Dicots
Astragalus adsurgens * Leguminosae Perennial Axial Root C3 Dicots
Allium mongolicum * Liliaceae Perennial Bulb Root C3 Monocots
A. tenuissimum * Liliaceae Perennial Bulb Root C3 Monocots
A. ramosum * Liliaceae Perennial Bulb Root C3 Monocots
Asparagus cochinchinensis * Liliaceae Perennial Fleshy root tuber C3 Monocots
Veratrum nigrum * Liliaceae Perennial Fibrous Root C3 Monocots
Cannabis sativa * Moraceae Annual C3 Dicots
Orobanche coerulescens * Orobanchaceae Perennial Fibrous Root C3 Dicots
Plantago major * Plantaginaceae Perennial Fibrous Root C3 Dicots
P. asiatica * Plantaginaceae Perennial Fibrous Root C3 Dicots
Limonium aureum * Plumbaginaceae Perennial Axial Root C3 Dicots
Triglochin palustre * Potamogetonaceae Perennial Rhizome C3 Monocots
Polygonum divaricatum * Polygonaceae Perennial Axial Root C3 Dicots
Glaux maritima * Primulaceae Perennial Axial Root C3 Dicots
Halerpestes ruthenica * Ranunculaceae Perennial Fibrous Root C3 Dicots
Clematis fruticosa * Ranunculaceae shrub C3 Dicots
Thalictrum squarrosum * Ranunculaceae Perennial Rhizome C4 Dicots
Delphinium grandiflorum * Ranunculaceae Perennial Axial Root C3 Dicots
Potentilla anserina * Rosaceae Perennial Fleshy root tuber C3 Dicots
P. bifurca * Rosaceae Perennial Ratoon C3 Dicots
P. chinensis * Rosaceae Perennial Axial Root C3 Dicots
P. acaulis * Rosaceae Perennial Axial Root C3 Dicots
P. tanacetifolia * Rosaceae Perennial Axial Root C3 Dicots
P. discolor * Rosaceae Perennial Axial Root C3 Dicots
P. longifolia * Rosaceae Perennial Axial Root C3 Dicots
Sanguisorba officinalis * Rosaceae Perennial Axial Root C3 Dicots
Haplophyllum dauricum * * Rutaceae Perennial Axial Root C3 Dicots
Populus × xiaozuanic * Salicaceae arbor C3 Dicots
Salix cheilophila * * Salicaceae shrub C3 Dicots
S. gordejevii * Salicaceae shrub C3 Dicots
Tamarix chinensis * Tamaricaceae shrub C3 Dicots
Reaumuria songarica * Tamaricaceae shrub C3 Dicots
Ulmus pumila * * Ulmaceae arbor C3 Dicots
Saposhnikovia divaricata * Umbelliferae Perennial Axial Root C3 Dicots
Cnidium monnieri * Umbelliferae Annual C3 Dicots
Ferula bungeana * Umbelliferae Perennial Axial Root C3 Dicots
Nitraria tangutorum * Zygophyllaceae shrub C3 Dicots
Peganum harmala. * Zygophyllaceae Perennial Ratoon C3 Dicots
P. harmala * Zygophyllaceae Perennial Ratoon C3 Dicots
Tribulus terrester * Zygophyllaceae Annual C4 Dicots

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