刈割、施肥和浇水对矮嵩草补偿生长的影响
Effects of clipping,fertilizing and watering on compensatory growth of Kobresia humilis
查看参考文献49篇
文摘
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通过对青海海北高寒矮嵩草(Kobresia humilis)草甸进行为期3年的野外控制试验,研究了刈割(留茬1 cm、3 cm及不刈割)、施肥(2.5 g·m~(-2)尿素+0.6 g·m~(-2)磷酸二胺、不施肥)和浇水(20.1 kg·m~(-2)、不浇水)处理对矮嵩草补偿生长(包括分株密度、株高和分株地上生物量)的影响,及其比叶面积、叶片净光合速率和相对增长率的变化,探讨矮嵩草补偿生长的机制。研究结果表明:刈割后,矮嵩草的补偿生长高度和比叶面积显著降低;分株密度有增加的趋势,但会随刈割强度的增加而下降;株高和生物量的相对增长率随刈割强度的增加而呈上升趋势;补偿地上生物量在重度刈割处理下最高。施肥能显著增加矮嵩草的补偿高度、分株密度、补偿地上生物量、株高相对增长率、生物量相对增长率、比叶面积和净光合速率:与不浇水处理相比,浇水处理对重度刈割处理下的分株地上生物量、密度相对增长率、比叶面积和净光合速率无影响,而显著降低了中度刈割处理下的补偿高度和株高相对增长率,提高了不刈割处理下的分株密度和重度刈割处理下的生物量相对增长率。刈割、施肥和浇水处理的交互作用也显示出刈割与施肥对矮嵩草补偿生长具有拮抗效应,而刈割与浇水具有协同效应。上述结果说明,矮嵩草在刈割后可通过增加分株密度和相对增长率等途径来提高补偿能力,弥补在生长高度上出现的低补偿,而施肥可显著抵消刈割的不利影响,提高矮嵩草的补偿能力。 |
其他语种文摘
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Aims Kobresia humilis meadow is a disturbance-dependent (disclimax)community resulting from long-term and heavy grazing.Our objectives were to (a)examine how the compensatory growth of K.humilis (including ramet density,compensatory height and compensatory aboveground biomass per ramet)varies with different levels of clipping,fertilizing and watering and (b)examine changes in specific leaf area (SLA),lamina net photosynthetic rate (Pn)and relative growth rate (RGR)in order to reveal the compensatory mechanisms of the species.Methods Our field experiment was carried out at the Haibei Research Station of the Chinese Academy of Sciences from 2007 to 2009.The experiment used a split-plot design with clipping treatment on the whole plot (stubbled 1 cm,3 cm and unclipped)and both fertilizer (fertilized and unfertilized)and water (watered and unwatered)treatments in subplots.We analyzed effects of clipping,fertilizing and watering on the response variables by multivariate ANOVA.We used stepwise regression analysis to determine the contribution of SLA,Pn and RGR to compensatory growth and Pearson's correlation to determine the correlation among ramet density,compensatory height and compensatory aboveground biomass.Important findings Compensatory height and SLA were reduced after clipping; RGR of ramet height and aboveground biomass,ramet density and compensatory biomass were increased.Fertilizing can increase ramet density,compensatory height,compensatory biomass,RGR of ramet height and aboveground biomass,SLA and Pn.The effect of watering on compensatory height and RGR of ramet height under stubbled 1 cm clipping was not obvious,but reduced them under stubbled 3 cm clipping.The interactions of clipping,fertilizing and watering showed that the relation between clipping and fertilizing is "antagonistic" and the relation between clipping and watering is "cooperative".Although K.humilis appeared under compensation in plant height,fertilizing could enhance the compensation ability and promote tolerance against defoliation at a certain level of clipping. |
来源
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植物生态学报
,2011,35(6):641-652 【核心库】
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DOI
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10.3724/sp.j.1258.2011.00641
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关键词
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刈割
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补偿性生长
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施肥
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矮嵩草
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浇水
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地址
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1.
陕西师范大学生命科学学院, 西安, 710062
2.
中国科学院西北高原生物研究所, 西宁, 810008
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1005-264X |
学科
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农作物 |
基金
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国家自然科学基金
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文献收藏号
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CSCD:4217493
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参考文献 共
49
共3页
|
1.
Archer S. Evaluation of potential herbivore mediation of plant water status in a North American mixedgrass prairie.
Oikos,1986,47:287-291
|
被引
2
次
|
|
|
|
2.
Belsky AJ. Does herbivory benefit plants? A review of the evidence.
The American Naturalist,1986,127:870-892
|
被引
100
次
|
|
|
|
3.
Belsky AJ. Overcompensation by plants:herbivore optimization or red herring.
Evolutionary Ecology,1993,7:109-121
|
被引
63
次
|
|
|
|
4.
Coughenour MB. Production and nitrogen responses of the African dwarf shrub Indigofera spinosa to defoliation and water limitation.
Oecologia,1990,83:546-552
|
被引
3
次
|
|
|
|
5.
代红军. 不同刈割程度对紫花苜蓿生长、净光合速率和可溶性糖含量的影响.
植物生理学通讯 (in Chinese with English abstract),2009,45:1061-1064
|
被引
10
次
|
|
|
|
6.
杜占池. The effect of cutting on the photosynthetic characteristics of Aneurolepidium chinense.
植物生态学与地植物学学报 (in Chinese with English abstract),1989,13:317-324
|
被引
12
次
|
|
|
|
7.
Dyer MI. Herbivory and its consequences.
Ecological Applications,1993,3:10-16
|
被引
20
次
|
|
|
|
8.
范青慈. Quality analysis of several dominant grasses of Cyperaceae plants in Qinghai.
四川草原 (in Chinese with English abstract),2002(4):37-39
|
被引
3
次
|
|
|
|
9.
高新中. A primary study on propagation strategy of Kobresia pygmaea and Kobresia humilis under different degenerative gradation in alpine meadow.
草业与畜牧 (in Chinese with English abstract),2008,146(1):7-11
|
被引
3
次
|
|
|
|
10.
Gao Y. Interactions between herbivory and resource availability on grazing tolerance of Leymus chinensis.
Environmental and Experimental Botany,2008,63:113-122
|
被引
21
次
|
|
|
|
11.
顾梦鹤. 施肥和刈割对垂穗披碱草(Elymus nutans)、中华羊茅(Festuca sinensis)和羊茅(Festuca ovina)种间竞争力的影响.
生态学报 (in Chinese with English abstract),2008,28:2472-2479
|
被引
29
次
|
|
|
|
12.
Hilbert DW. Relative growth rates and the grazing optimization hypothesis.
Oecologia,1981,51:14-18
|
被引
27
次
|
|
|
|
13.
Huhta AP. Grazing tolerance of Gentianella amarella and other monocarpic herbs:Why is tolerance highest at low damage levels.
Plant Ecology,2003,166:49-61
|
被引
25
次
|
|
|
|
14.
Keddy PA. Experimental evidence that interspecific competitive asymmetry increases with soil production.
Oikos,1997,80:253-256
|
被引
12
次
|
|
|
|
15.
Lavorel S. Plant functional types:Are we getting any closer to the Holy Grail.
Terrestrial Ecosystems in a Changing World.The IGBP Series,2007:149-164
|
被引
1
次
|
|
|
|
16.
李以康. Physiological response of Kobresia humilis to nitrogenous fertilizer in an alpine meadow.
草业学报 (in Chinese with English abstract),2010,1(9):240
|
被引
1
次
|
|
|
|
17.
李玉霖. 不同沙丘生境主要植物比叶面积和叶干物质含量的比较.
生态学报 (in Chinese with English ab.stract),2005,25:304-311
|
被引
136
次
|
|
|
|
18.
李英年. 海北高寒草甸生态系统定位站气候、植被生产力背景的分析.
高原气象 (in Chinese with English abstract),2004,23:558-567
|
被引
130
次
|
|
|
|
19.
刘建军. 放牧对草原生态系统地下生产力及生物量的影响.
西北植物学报 (in Chinese with English abstract),2005,25:88-93
|
被引
33
次
|
|
|
|
20.
刘建秀. 高寒草甸放牧扰动与两种植物的反应研究.
西北植物学报 (in Chinese with English abstract),2005,25:2043-2047
|
被引
17
次
|
|
|
|
|