施肥对高寒草甸植物群落组分种繁殖分配的影响

doi:10.17521/cjpe.2006.0104

摘要/Abstract

摘要：

该文以青藏高原东部高寒草甸植物群落的24种主要组分种为材料,研究了施肥对多年生草本植物繁殖分配的影响。结果表明:1)对多数群落组分种来说,施肥显著影响生物量和生物量分配;2)随着肥力的增加,大多数物种的植株个体明显增大、繁殖输出减小或不变,进而导致它们的繁殖分配明显减小;3)施肥影响的个体大小和生物量分配变化程度与方向因物种而异,对一些物种的影响不明显,对个别物种的影响方向不同于对多数物种的影响;4)施肥后群落水平的繁殖分配明显减小。

关键词: 施肥, 高寒草甸, 植物群落, 生物量分配, 繁殖分配

Abstract:

Background and Aims Plant resource allocation strategies are important in determining community structure in variable environments. However, observations of changes in species reproductive allocation under disturbance at the community level are rare. This study addresses the following questions: 1) does fertilization alter patterns of species reproductive allocation in natural plant communities, 2) are there interspecific differences for a fertilization effect, and 3) what is the effect of fertilization on assemblage-level reproductive allocation?

Methods The study was conducted at the Alpine Meadow Ecosystem Field Station of Lanzhou University, Maqu (101°53' E, 35°58' N). The experimental plant communities are typical of alpine meadow of the eastern QingHai-Tibetan Plateau. In mid May of 2002 and 2003, we established a soil nutrient gradient of diammonium phosphate (DAP) in the natural plant communities using a completely randomized design (3 levels of fertilization treatments and 3 repetitions of each level). From June to September, we sampled above-ground parts of 24 plant species at their fruiting stage, randomly selecting 20 individuals at every treatment level. The samples were dried to constant weight for 10 h at 80 ℃, and each individual was dissected into fruits, stems and leaves, which were weighed by Sartorius balances (to the nearest 10^-4 g). Reproductive, stem, and leaf allocations were calculated as the proportion of total biomass. ANOVA was used to test the effect of fertilization on patterns of species reproductive allocation.

Key Results Fertilization significantly affected both the biomass and the biomass allocation of most species. Total biomass, leaf biomass, and stem biomass of most species increased with soil nutrient level, but reproductive biomass remained constant or decreased. Reproductive allocation decreased, stem allocation increased, and leaf allocation was constant in most species. The degree and direction of responses differed among species, indicating the differences of life history. Reproductive allocation at the assemblage-level decreased with fertilization.

Conclusions The study suggests that plant individuals tend to become larger, reproductive allocation decreases, and stem allocation and leaf allocation increase as fertility increases. The effect of fertilization on resource allocation strategies is different among species within the same plant community.

Key words: Fertility, Alpine meadow, Plant communities, Biomass allocation, Reproductive allocation

牛克昌, 赵志刚, 罗燕江, 杜国祯. 施肥对高寒草甸植物群落组分种繁殖分配的影响. 植物生态学报, 2006, 30(5): 817-826. DOI: 10.17521/cjpe.2006.0104

NIU Ke-Chang, ZHAO Zhi-Gang, LUO Yan-Jiang, DU Guo-Zhen. FERTILIZATION EFFECTS ON SPECIES REPRODUCTIVE ALLOCATION IN AN ALPINE MEADOW PLANT COMMUNITY. Chinese Journal of Plant Ecology, 2006, 30(5): 817-826. DOI: 10.17521/cjpe.2006.0104

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2006.0104

https://www.plant-ecology.com/CN/Y2006/V30/I5/817

图/表 3

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生活型 Living form			物种 Species
轴根型多年生草本 Axial-perennial herb			小花草玉梅(Anemone rivularis var flore-minors)、毛果婆婆纳(Veronica eriogyne)、展毛翠雀花(Delphinium kamaonense var. glabrescens)、钝裂银莲花(Anemone obtusiloba)、莓叶萎陵菜(Potentilla fragarioides)、蒙古蒲公英(Taraxacum mongolicum)、防风(Saposhnikovia divaricata)、长毛凤毛菊(Saussurea hieracioides)
根蘖型多年生草本 Root-tillering perennial herb			乳浆大戟(Euphorbia pekineusis)、花苜蓿(Trigonella ruthenica)、小叶黑柴胡(Bupleurum smithii var. parvifolium)
根茎型多年生草本 Rhizoma perennial herb			细叶亚菊(Ajania tenuifolia)、蓬子菜(Galium verum)、米口袋(Gueldenstaedtia diversifolia)、獐牙菜(Swertia bimaculata)
短根茎密丛型多年生草本 Short rhizoma perennial herb			线叶嵩草(Kobresia capillifolia)
密丛型多年生草本 Dense shoot perennial herb			异针茅(Stipa aliena)、葎草(Koeleria cristata)
疏丛型多年生草本 Sparse shoot perennial herb			垂穗披碱草(Elymus nutans)、垂穗鹅观草(Roegneria nutans)、波伐早熟禾(Poa botryoides)、穗序剪股颖(Agrostis gigantea)
球茎型多年生草本 Perennial creeper			兰花韭(Allium beesianum)
粗状须根型多年生草本 Thick fiber perennial herb			丝叶毛茛(Ranunculus tanguticus var. nematolobus)

生活型 Living form			物种 Species
轴根型多年生草本 Axial-perennial herb			小花草玉梅(Anemone rivularis var flore-minors)、毛果婆婆纳(Veronica eriogyne)、展毛翠雀花(Delphinium kamaonense var. glabrescens)、钝裂银莲花(Anemone obtusiloba)、莓叶萎陵菜(Potentilla fragarioides)、蒙古蒲公英(Taraxacum mongolicum)、防风(Saposhnikovia divaricata)、长毛凤毛菊(Saussurea hieracioides)
根蘖型多年生草本 Root-tillering perennial herb			乳浆大戟(Euphorbia pekineusis)、花苜蓿(Trigonella ruthenica)、小叶黑柴胡(Bupleurum smithii var. parvifolium)
根茎型多年生草本 Rhizoma perennial herb			细叶亚菊(Ajania tenuifolia)、蓬子菜(Galium verum)、米口袋(Gueldenstaedtia diversifolia)、獐牙菜(Swertia bimaculata)
短根茎密丛型多年生草本 Short rhizoma perennial herb			线叶嵩草(Kobresia capillifolia)
密丛型多年生草本 Dense shoot perennial herb			异针茅(Stipa aliena)、葎草(Koeleria cristata)
疏丛型多年生草本 Sparse shoot perennial herb			垂穗披碱草(Elymus nutans)、垂穗鹅观草(Roegneria nutans)、波伐早熟禾(Poa botryoides)、穗序剪股颖(Agrostis gigantea)
球茎型多年生草本 Perennial creeper			兰花韭(Allium beesianum)
粗状须根型多年生草本 Thick fiber perennial herb			丝叶毛茛(Ranunculus tanguticus var. nematolobus)

物种 Species	处理 Treatment	果重(g) Fruit biomass	茎总重(g) Stem biomass	叶总重(g) Leaf biomass	总重(g) Total biomass	繁殖分配(%) Reproductive allocation	茎分配(%) Stem allocation	叶分配(%) Leaf allocation
小花草玉梅 Anemone rivularis var. flore-minors	CK LN HN	0.409±0.04^A 0.220±0.03^b 0.240±0.03^b	0.763±0.12^a 0.624±0.06^a 0.764±0.07^a	0.997±0.10^a 0.693±0.11^b 0.965±0.11^ab	2.169±0.21^A 1.537±0.14^b 1.970±0.15^ab	0.189±0.02^a 0.154±0.02^ab 0.125±0.01^b	0.336±0.11^a 0.416±0.16^b 0.394±0.1a^b	0.475±0.13^a 0.431±0.14^a 0.482±0.19^a
丝叶毛茛 Ranunculus tanguticus var. nematolobus	CK LN HN	0.016±0^A 0.017±0^b 0.026±0^b	0.027±0^A 0.047±0.01^ab 0.060±0.01^b	0.018±0^A 0.034±0.01^ab 0.038±0^b	0.061±0.01^a 0.098±0.01^b 0.123±0.02^B	0.256±0.02^a 0.199±0.02^a 0.213±0.02^ab	0.425±0.03^a 0.452±0.04^a 0.476±0.02^a	0.319±0.03^a 0.349±0.04^a 0.311±0.02^a
钝裂银莲花 Anemone obtusiloba	CK LN HN	0.040±0^a 0.039±0^a 0.038±0.01^a	0.046±0.01^a 0.057±0.01^a 0.049±0.01^a	0.108±0.01^a 0.100±0.01^a 0.096±0.01^a	0.194±0.02^a 0.196±0.02^a 0.184±0.02^a	0.214±0.01^a 0.211±0.02^a 0.213±0.02^a	0.227±0.01^a 0.268±0.02^a 0.264±0.02^a	0.559±0.02^a 0.521±0.03^a 0.523±0.02^a
展毛翠雀花 Delphinium kamaonense var. glabrescens	CK LN HN	0.022±0.01^a 0.017±0^a 0.019±0.01^a	0.194±0.04^a 0.271±0.04^a 0.231±0.03^a	0.105±0.01^a 0.108±0.01^a 0.104±0.02^a	0.321±0.05^a 0.397±0.05^a 0.354±0.05^a	0.067±0.01^a 0.049±0.01^a 0.041±0.01^a	0.582±0.58^a 0.661±0.02^b 0.646±0.02^b	0.351±0.02^a 0.290±0.02^a 0.313±0.03^a
蓬子菜^* Galium verum	CK LN HN	0.026±0^A 0.020±0.01^ab 0.008±0^b	0.374±0.05^A 0.574±0.02^b 0.567±0.06^b		0.400±0.05^A 0.594±0.02^b 0.575±0.06^ab	0.062±0^A 0.033±0.01^b 0.023±0.01^b	0.938±0^A 0.967±0.01^b 0.977±0.01^b
小叶黑柴胡 Bupleurum smithii var. parvifolium	CK LN HN	0.084±0.01^a 0.089±0.01^a 0.051±0.01^a	0.095±0.01^a 0.167±0.03^a 0.095±0.01^a	0.201±0.03^A 0.136±0.04^ab 0.061±0.01^b	0.381±0.04^A 0.393±0.07^a 0.207±0.02^b	0.242±0.03^a 0.244±0.02^a 0.258±0.02^a	0.255±0.02^A 0.456±0.03^B 0.480±0.03^B	0.504±0.04^A 0.300±0.04^B 0.262±0.04^B
莓叶委陵菜 Potentilla fragarioides	CK LN HN	0.041±0^a 0.089±0.04^a 0.067±0.01^a	0.071±0.01^A 0.137±0.03^ab 0.116±0.01^b	0.091±0.01^a 0.110±0.02^a 0.117±0.02^a	0.204±0.01^a 0.336±0.06^ab 0.301±0.03^a	0.200±0.01^a 0.206±0.03^a 0.206±0.03^a	0.349±0.03^a 0.421±0.03^b 0.392±0.02^ab	0.452±0.03^a 0.373±0.04^a 0.402±0.04^a
蓝花韭 Allium beesianum	CK LN HN	0.032±0^a 0.031±0.01^a 0.028±0^a	0.054±0^a 0.066±0.02^a 0.061±0^a	0.016±0^a 0.008±0^b 0.013±0^ab	0.101±0.01^a 0.104±0.02^a 0.100±0.01^a	0.314±0.02^a 0.304±0.03^a 0.277±0.02^a	0.531±0.02^a 0.603±0.03^b 0.608±0.03^b	0.172±0.02^A 0.101±0.01^b 0.127±0.02^ab
毛果婆婆纳 Veronica eriogyne	CK LN HN	0.065±0.02^a 0.032±0.01^a 0.064±0.01^a	0.080±0.02^a 0.114±0.02^b 0.153±0.02^B	0.067±0.01^a 0.073±0.01^a 0.096±0.01^a	0.212±0.04^a 0.220±0.03^a 0.313±0.04^a	0.277±0.03^a 0.143±0.02^B 0.173±0.02^b	0.386±0.02^A 0.510±0.02^b 0.491±0.02^b	0.337±0.03^a 0.347±0.02^a 0.336±0.02^a
细叶亚菊^* Ajania tenuifolia	CK LN HN	0.076±0.01^a 0.064±0.01^a 0.081±0.01^a	0.345±0.06^a 0.324±0.03^a 0.371±0.03^a		0.421±0.08^a 0.388±0.03^a 0.451±0.04^a	0.183±0.02^a 0.156±0.01^a 0.168±0.01^a	0.817±0.02^a 0.844±0.01^a 0.832±0.01^a
獐牙菜 Swertia bimaculata	CK LN HN	0.085±0.01^a 0.114±0.06^a 0.064±0.01^a	0.072±0.01^a 0.177±0.08^a 0.073±0.01^a	0.012±0^a 0.015±0^a 0.013±0^a	0.169±0.03^a 0.306±0.11^a 0.149±0.02^a	0.515±0.01^A 0.389±0.02^b 0.425±0.02^b	0.405±0.01^a 0.473±0.02^b 0.478±0.02^b	0.080±0^a 0.138±0.04^a 0.097±0.01^a
米口袋 Gueldenstaedtia diversifolia	CK LN HN	0.069±0.01^a 0.046±0.01^a 0.044±0.01^a	0.059±0.01^a 0.047±0.01^a 0.044±0.01^a	0.220±0.02^a 0.270±0.04^a 0.207±0.02^a	0.348±0.04^a 0.363±0.05^a 0.295±0.02^a	0.184±0.02^a 0.127±0.02^b 0.140±0.01^b	0.172±0.01^a 0.136±0.01^a 0.152±0.01^a	0.645±0.02^a 0.737±0.02^B 0.709±0.02^b
乳浆大戟 Euphorbia pekineusis	CK LN HN	0.049±0.01^a 0.018±0^b 0.026±0^ab	0.053±0.01^a 0.069±0.01^a 0.077±0.01^a	0.105±0.02^a 0.087±0.01^a 0.117±0.01^a	0.207±0.03^a 0.174±0.02^a 0.213±0.03^a	0.234±0.02^a 0.093±0.01^B 0.132±0.02^b	0.256±0.01^a 0.394±0.04^B 0.365±0.04^b	0.510±0.02^a 0.513±0.04^a 0.537±0.03^a
防风 Saposhnikovia divaricata	CK LN HN	0.047±0.01^a 0.033±0.01^a 0.046±0.01^a	0.077±0.01^a 0.090±0.01^a 0.149±0.04^a	0.093±0.01^a 0.052±0.01^a 0.074±0.01^a	0.218±0.03^a 0.175±0.02^a 0.270±0.05^a	0.215±0.02^a 0.188±0.02^ab 0.160±0.01^b	0.363±0.02^A 0.506±0.04^b 0.530±0.04^b	0.422±0.03^a 0.305±0.04^b 0.310±0.04^b
长毛凤毛菊 Saussurea hieracioides	CK LN HN	0.310±0.03^ab 0.448±0.07^a 0.326±0.04^b	0.644±0.05^a 0.726±0.08^a 0.545±0.06^a	1.283±0.11^a 1.643±0.21^a 1.144±0.14^a	2.239±0.12^a 2.817±0.32^a 2.016±0.20^a	0.293±0.02^a 0.268±0.02^a 0.284±0.02^a	0.149±0.02^a 0.162±0.02^a 0.168±0.01^a	0.557±0.03^a 0.571±0.02^a 0.549±0.03^a
蒙古蒲公英 Taraxacum mongolicum	CK LN HN	0.111±0.01^a 0.137±0.02^a 0.097±0.01^a	0.140±0.03^a 0.132±0.02^a 0.090±0.01^a	0.217±0.02^a 0.160±0.02^a 0.179±0.03^a	0.468±0.05^a 0.429±0.04^a 0.366±0.05^a	0.249±0.02^a 0.314±0.03^b 0.281±0.02^ab	0.268±0.03^a 0.305±0.02^a 0.260±0.02^a	0.482±0.03^a 0.381±0.05^a 0.459±0.04^a
物种 Species	处理 Treatment	果重(g) Fruit biomass	茎总重(g) Stem biomass	叶总重(g) Leaf biomass	总重(g) Total biomass	繁殖分配(%) Reproductive allocation	茎分配(%) Stem allocation	叶分配(%) Leaf allocation
花苜蓿^* Trigonella ruthenica	CK LN HN	0.005±0^a 0.007±0^a 0.004±0^a	0.069±0.01^a 0.183±0.02^B 0.112±0.01^C		0.074±0.01^A 0.190±0.02^B 0.116±0.01^c	0.077±0.01^A 0.041±0.01^B 0.040±0^B	0.923±0.01^A 0.959±0.01^b 0.960±0^b
线叶嵩草 Kobresia capillifolia	CK LN HN	0.059±0.01^a 0.050±0.01^a 0.071±0.01^a	0.322±0.09^a 0.395±0.07^ab 0.684±0.15^b	0.318±0.05^a 0.486±0.07^ab 0.791±0.12^B	0.699±0.13^a 0.931±0.12^a 1.545±0.2^B	0.091±0.01^a 0.048±0.01^b 0.058±0.02^ab	0.437±0.04^a 0.412±0.04^a 0.419±0.04^a	0.472±0.04^a 0.539±0.04^a 0.523±0.04^a
垂穗鹅观草 Roegneria nutans	CK LN HN	0.150±0.02^a 0.091±0.02^b 0.177±0.02^A	0.308±0.04^a 0.184±0.04^B 0.355±0.04^a	0.303±0.03^a 0.151±0.02^B 0.361±0.06^a	0.611±0.06^a 0.335±0.05^B 0.716±0.07^a	0.240±0.01^a 0.266±0.03^a 0.244±0.02^a	0.486±0.03^a 0.529±0.05^a 0.502±0.04^a	0.514±0.03^a 0.471±0.05^a 0.498±0.04^a
波伐早熟禾 Poa botryoides	CK LN HN	0.032±0.01^a 0.046±0.01^a 0.167±0.04^b	0.182±0.02^a 0.420±0.07^b 0.307±0.06^ab	0.095±0.01^a 0.181±0.04^b 0.173±0.04^b	0.277±0.03^a 0.600±0.10^b 0.480±0.10^ab	0.123±0.02^a 0.088±0.01^a 0.288±0.04^B	0.653±0.03^a 0.714±0.04^a 0.697±0.04^a	0.347±0.03^a 0.286±0.04^a 0.303±0.04^a
异针茅 Stipa aliena	CK LN HN	0.039±0^a 0.050±0.01^a 0.038±0^a	0.079±0.01^a 0.090±0.01^a 0.074±0.01^a	0.413±0.05^a 0.573±0.09^a 0.43±0.08^a	0.492±0.06^a 0.663±0.11^a 0.504±0.09^a	0.090±0.01^a 0.105±0.02^a 0.098±0.01^a	0.176±0.02^a 0.176±0.02^a 0.174±0.03^a	0.824±0.02^a 0.824±0.02^a 0.826±0.02^a
穗序剪股颖 Agrostis gigantea	CK LN HN	0.022±0^a 0.027±0^a 0.043±0.01^a	0.052±0.01^a 0.079±0.01^ab 0.130±0.03^b	0.043±0.01^a 0.138±0.03^b 0.286±0.07^B	0.095±0.01^A 0.218±0.03^b 0.417±0.08^b	0.252±0.02^A 0.156±0.02^b 0.143±0.02^b	0.600±0.04^a 0.435±0.05^ab 0.383±0.05^B	0.400±0.04^a 0.565±0.05^b 0.617±0.05^B
垂穗披硷草 Elymuns nutans	CK LN HN	0.173±0.02^A 0.239±0.03^a 0.353±0.04^b	0.325±0.05^A 0.509±0.08^ab 0.794±0.10^b	0.305±0.04^a 0.440±0.05^a 0.878±0.09^B	0.630±0.08^a 0.948±0.11^a 1.672±0.16^B	0.280±0.03^a 0.330±0.06^a 0.221±0.02^a	0.506±0.03^a 0.487±0.04^a 0.467±0.03^a	0.494±0.03^a 0.513±0.04^a 0.533±0.03^a
葎草 Koeleria cristata	CK LN HN	0.036±0^A 0.080±0.01^B 0.166±0.02^c	0.069±0.01^A 0.176±0.02^b 0.312±0.05^b	0.034±0.01^A 0.417±0.05^b 0.445±0.08^b	0.103±0.01^A 0.593±0.06^b 0.756±0.10^b	0.350±0.02^A 0.148±0.02^b 0.253±0.04^b	0.683±0.03^A 0.333±0.04^b 0.439±0.05^b	0.317±0.03^A 0.667±0.04^b 0.561±0.05^b

物种 Species	处理 Treatment	果重(g) Fruit biomass	茎总重(g) Stem biomass	叶总重(g) Leaf biomass	总重(g) Total biomass	繁殖分配(%) Reproductive allocation	茎分配(%) Stem allocation	叶分配(%) Leaf allocation
小花草玉梅 Anemone rivularis var. flore-minors	CK LN HN	0.409±0.04^A 0.220±0.03^b 0.240±0.03^b	0.763±0.12^a 0.624±0.06^a 0.764±0.07^a	0.997±0.10^a 0.693±0.11^b 0.965±0.11^ab	2.169±0.21^A 1.537±0.14^b 1.970±0.15^ab	0.189±0.02^a 0.154±0.02^ab 0.125±0.01^b	0.336±0.11^a 0.416±0.16^b 0.394±0.1a^b	0.475±0.13^a 0.431±0.14^a 0.482±0.19^a
丝叶毛茛 Ranunculus tanguticus var. nematolobus	CK LN HN	0.016±0^A 0.017±0^b 0.026±0^b	0.027±0^A 0.047±0.01^ab 0.060±0.01^b	0.018±0^A 0.034±0.01^ab 0.038±0^b	0.061±0.01^a 0.098±0.01^b 0.123±0.02^B	0.256±0.02^a 0.199±0.02^a 0.213±0.02^ab	0.425±0.03^a 0.452±0.04^a 0.476±0.02^a	0.319±0.03^a 0.349±0.04^a 0.311±0.02^a
钝裂银莲花 Anemone obtusiloba	CK LN HN	0.040±0^a 0.039±0^a 0.038±0.01^a	0.046±0.01^a 0.057±0.01^a 0.049±0.01^a	0.108±0.01^a 0.100±0.01^a 0.096±0.01^a	0.194±0.02^a 0.196±0.02^a 0.184±0.02^a	0.214±0.01^a 0.211±0.02^a 0.213±0.02^a	0.227±0.01^a 0.268±0.02^a 0.264±0.02^a	0.559±0.02^a 0.521±0.03^a 0.523±0.02^a
展毛翠雀花 Delphinium kamaonense var. glabrescens	CK LN HN	0.022±0.01^a 0.017±0^a 0.019±0.01^a	0.194±0.04^a 0.271±0.04^a 0.231±0.03^a	0.105±0.01^a 0.108±0.01^a 0.104±0.02^a	0.321±0.05^a 0.397±0.05^a 0.354±0.05^a	0.067±0.01^a 0.049±0.01^a 0.041±0.01^a	0.582±0.58^a 0.661±0.02^b 0.646±0.02^b	0.351±0.02^a 0.290±0.02^a 0.313±0.03^a
蓬子菜^* Galium verum	CK LN HN	0.026±0^A 0.020±0.01^ab 0.008±0^b	0.374±0.05^A 0.574±0.02^b 0.567±0.06^b		0.400±0.05^A 0.594±0.02^b 0.575±0.06^ab	0.062±0^A 0.033±0.01^b 0.023±0.01^b	0.938±0^A 0.967±0.01^b 0.977±0.01^b
小叶黑柴胡 Bupleurum smithii var. parvifolium	CK LN HN	0.084±0.01^a 0.089±0.01^a 0.051±0.01^a	0.095±0.01^a 0.167±0.03^a 0.095±0.01^a	0.201±0.03^A 0.136±0.04^ab 0.061±0.01^b	0.381±0.04^A 0.393±0.07^a 0.207±0.02^b	0.242±0.03^a 0.244±0.02^a 0.258±0.02^a	0.255±0.02^A 0.456±0.03^B 0.480±0.03^B	0.504±0.04^A 0.300±0.04^B 0.262±0.04^B
莓叶委陵菜 Potentilla fragarioides	CK LN HN	0.041±0^a 0.089±0.04^a 0.067±0.01^a	0.071±0.01^A 0.137±0.03^ab 0.116±0.01^b	0.091±0.01^a 0.110±0.02^a 0.117±0.02^a	0.204±0.01^a 0.336±0.06^ab 0.301±0.03^a	0.200±0.01^a 0.206±0.03^a 0.206±0.03^a	0.349±0.03^a 0.421±0.03^b 0.392±0.02^ab	0.452±0.03^a 0.373±0.04^a 0.402±0.04^a
蓝花韭 Allium beesianum	CK LN HN	0.032±0^a 0.031±0.01^a 0.028±0^a	0.054±0^a 0.066±0.02^a 0.061±0^a	0.016±0^a 0.008±0^b 0.013±0^ab	0.101±0.01^a 0.104±0.02^a 0.100±0.01^a	0.314±0.02^a 0.304±0.03^a 0.277±0.02^a	0.531±0.02^a 0.603±0.03^b 0.608±0.03^b	0.172±0.02^A 0.101±0.01^b 0.127±0.02^ab
毛果婆婆纳 Veronica eriogyne	CK LN HN	0.065±0.02^a 0.032±0.01^a 0.064±0.01^a	0.080±0.02^a 0.114±0.02^b 0.153±0.02^B	0.067±0.01^a 0.073±0.01^a 0.096±0.01^a	0.212±0.04^a 0.220±0.03^a 0.313±0.04^a	0.277±0.03^a 0.143±0.02^B 0.173±0.02^b	0.386±0.02^A 0.510±0.02^b 0.491±0.02^b	0.337±0.03^a 0.347±0.02^a 0.336±0.02^a
细叶亚菊^* Ajania tenuifolia	CK LN HN	0.076±0.01^a 0.064±0.01^a 0.081±0.01^a	0.345±0.06^a 0.324±0.03^a 0.371±0.03^a		0.421±0.08^a 0.388±0.03^a 0.451±0.04^a	0.183±0.02^a 0.156±0.01^a 0.168±0.01^a	0.817±0.02^a 0.844±0.01^a 0.832±0.01^a
獐牙菜 Swertia bimaculata	CK LN HN	0.085±0.01^a 0.114±0.06^a 0.064±0.01^a	0.072±0.01^a 0.177±0.08^a 0.073±0.01^a	0.012±0^a 0.015±0^a 0.013±0^a	0.169±0.03^a 0.306±0.11^a 0.149±0.02^a	0.515±0.01^A 0.389±0.02^b 0.425±0.02^b	0.405±0.01^a 0.473±0.02^b 0.478±0.02^b	0.080±0^a 0.138±0.04^a 0.097±0.01^a
米口袋 Gueldenstaedtia diversifolia	CK LN HN	0.069±0.01^a 0.046±0.01^a 0.044±0.01^a	0.059±0.01^a 0.047±0.01^a 0.044±0.01^a	0.220±0.02^a 0.270±0.04^a 0.207±0.02^a	0.348±0.04^a 0.363±0.05^a 0.295±0.02^a	0.184±0.02^a 0.127±0.02^b 0.140±0.01^b	0.172±0.01^a 0.136±0.01^a 0.152±0.01^a	0.645±0.02^a 0.737±0.02^B 0.709±0.02^b
乳浆大戟 Euphorbia pekineusis	CK LN HN	0.049±0.01^a 0.018±0^b 0.026±0^ab	0.053±0.01^a 0.069±0.01^a 0.077±0.01^a	0.105±0.02^a 0.087±0.01^a 0.117±0.01^a	0.207±0.03^a 0.174±0.02^a 0.213±0.03^a	0.234±0.02^a 0.093±0.01^B 0.132±0.02^b	0.256±0.01^a 0.394±0.04^B 0.365±0.04^b	0.510±0.02^a 0.513±0.04^a 0.537±0.03^a
防风 Saposhnikovia divaricata	CK LN HN	0.047±0.01^a 0.033±0.01^a 0.046±0.01^a	0.077±0.01^a 0.090±0.01^a 0.149±0.04^a	0.093±0.01^a 0.052±0.01^a 0.074±0.01^a	0.218±0.03^a 0.175±0.02^a 0.270±0.05^a	0.215±0.02^a 0.188±0.02^ab 0.160±0.01^b	0.363±0.02^A 0.506±0.04^b 0.530±0.04^b	0.422±0.03^a 0.305±0.04^b 0.310±0.04^b
长毛凤毛菊 Saussurea hieracioides	CK LN HN	0.310±0.03^ab 0.448±0.07^a 0.326±0.04^b	0.644±0.05^a 0.726±0.08^a 0.545±0.06^a	1.283±0.11^a 1.643±0.21^a 1.144±0.14^a	2.239±0.12^a 2.817±0.32^a 2.016±0.20^a	0.293±0.02^a 0.268±0.02^a 0.284±0.02^a	0.149±0.02^a 0.162±0.02^a 0.168±0.01^a	0.557±0.03^a 0.571±0.02^a 0.549±0.03^a
蒙古蒲公英 Taraxacum mongolicum	CK LN HN	0.111±0.01^a 0.137±0.02^a 0.097±0.01^a	0.140±0.03^a 0.132±0.02^a 0.090±0.01^a	0.217±0.02^a 0.160±0.02^a 0.179±0.03^a	0.468±0.05^a 0.429±0.04^a 0.366±0.05^a	0.249±0.02^a 0.314±0.03^b 0.281±0.02^ab	0.268±0.03^a 0.305±0.02^a 0.260±0.02^a	0.482±0.03^a 0.381±0.05^a 0.459±0.04^a
物种 Species	处理 Treatment	果重(g) Fruit biomass	茎总重(g) Stem biomass	叶总重(g) Leaf biomass	总重(g) Total biomass	繁殖分配(%) Reproductive allocation	茎分配(%) Stem allocation	叶分配(%) Leaf allocation
花苜蓿^* Trigonella ruthenica	CK LN HN	0.005±0^a 0.007±0^a 0.004±0^a	0.069±0.01^a 0.183±0.02^B 0.112±0.01^C		0.074±0.01^A 0.190±0.02^B 0.116±0.01^c	0.077±0.01^A 0.041±0.01^B 0.040±0^B	0.923±0.01^A 0.959±0.01^b 0.960±0^b
线叶嵩草 Kobresia capillifolia	CK LN HN	0.059±0.01^a 0.050±0.01^a 0.071±0.01^a	0.322±0.09^a 0.395±0.07^ab 0.684±0.15^b	0.318±0.05^a 0.486±0.07^ab 0.791±0.12^B	0.699±0.13^a 0.931±0.12^a 1.545±0.2^B	0.091±0.01^a 0.048±0.01^b 0.058±0.02^ab	0.437±0.04^a 0.412±0.04^a 0.419±0.04^a	0.472±0.04^a 0.539±0.04^a 0.523±0.04^a
垂穗鹅观草 Roegneria nutans	CK LN HN	0.150±0.02^a 0.091±0.02^b 0.177±0.02^A	0.308±0.04^a 0.184±0.04^B 0.355±0.04^a	0.303±0.03^a 0.151±0.02^B 0.361±0.06^a	0.611±0.06^a 0.335±0.05^B 0.716±0.07^a	0.240±0.01^a 0.266±0.03^a 0.244±0.02^a	0.486±0.03^a 0.529±0.05^a 0.502±0.04^a	0.514±0.03^a 0.471±0.05^a 0.498±0.04^a
波伐早熟禾 Poa botryoides	CK LN HN	0.032±0.01^a 0.046±0.01^a 0.167±0.04^b	0.182±0.02^a 0.420±0.07^b 0.307±0.06^ab	0.095±0.01^a 0.181±0.04^b 0.173±0.04^b	0.277±0.03^a 0.600±0.10^b 0.480±0.10^ab	0.123±0.02^a 0.088±0.01^a 0.288±0.04^B	0.653±0.03^a 0.714±0.04^a 0.697±0.04^a	0.347±0.03^a 0.286±0.04^a 0.303±0.04^a
异针茅 Stipa aliena	CK LN HN	0.039±0^a 0.050±0.01^a 0.038±0^a	0.079±0.01^a 0.090±0.01^a 0.074±0.01^a	0.413±0.05^a 0.573±0.09^a 0.43±0.08^a	0.492±0.06^a 0.663±0.11^a 0.504±0.09^a	0.090±0.01^a 0.105±0.02^a 0.098±0.01^a	0.176±0.02^a 0.176±0.02^a 0.174±0.03^a	0.824±0.02^a 0.824±0.02^a 0.826±0.02^a
穗序剪股颖 Agrostis gigantea	CK LN HN	0.022±0^a 0.027±0^a 0.043±0.01^a	0.052±0.01^a 0.079±0.01^ab 0.130±0.03^b	0.043±0.01^a 0.138±0.03^b 0.286±0.07^B	0.095±0.01^A 0.218±0.03^b 0.417±0.08^b	0.252±0.02^A 0.156±0.02^b 0.143±0.02^b	0.600±0.04^a 0.435±0.05^ab 0.383±0.05^B	0.400±0.04^a 0.565±0.05^b 0.617±0.05^B
垂穗披硷草 Elymuns nutans	CK LN HN	0.173±0.02^A 0.239±0.03^a 0.353±0.04^b	0.325±0.05^A 0.509±0.08^ab 0.794±0.10^b	0.305±0.04^a 0.440±0.05^a 0.878±0.09^B	0.630±0.08^a 0.948±0.11^a 1.672±0.16^B	0.280±0.03^a 0.330±0.06^a 0.221±0.02^a	0.506±0.03^a 0.487±0.04^a 0.467±0.03^a	0.494±0.03^a 0.513±0.04^a 0.533±0.03^a
葎草 Koeleria cristata	CK LN HN	0.036±0^A 0.080±0.01^B 0.166±0.02^c	0.069±0.01^A 0.176±0.02^b 0.312±0.05^b	0.034±0.01^A 0.417±0.05^b 0.445±0.08^b	0.103±0.01^A 0.593±0.06^b 0.756±0.10^b	0.350±0.02^A 0.148±0.02^b 0.253±0.04^b	0.683±0.03^A 0.333±0.04^b 0.439±0.05^b	0.317±0.03^A 0.667±0.04^b 0.561±0.05^b