帮助 关于我们

返回检索结果

高施氮量对高寒矮嵩草甸主要类群和多样性及质量的影响
Responses of Plant Groups, Diversity and Meadow Quality to High-rate N Fertilization on Alpine Kobresia humilis Community

查看参考文献22篇

沈振西 1   陈佐忠 2   周兴民 1   周华坤 1  
文摘 研究高寒矮嵩草草甸高强度施氮试验(150和300kg N/hm~2)对不同植物类群的影响。结果表明,禾草类植物的反应较大,其综合优势比呈明显增大趋势,非豆科杂草次之,莎草类和豆科杂草的反应不显著。增施氮肥能明显降低矮嵩草草甸的植物多样性,其草甸质量2指数以施氮150kg/hm~2最高,过量施氮(300/hm~2)并不再提高草甸质量。其地上生物量对施氮的反应比多样性和草甸质量指数的变化滞后,地上生物总量在施氮后明显增加,其中禾草类明显增加,杂类草则明显降低。7月的降水量及其分布对施氮的效果影响较大。土壤水分状况对施肥效果十分重要。
其他语种文摘 The experiment with three levels of N-fertlizer (0、150 and 300kg N/hm~2) was conducted for three years at alpin Kobresia humilis meadow to study responses of different plant groups and some species. The response of grasses was more significance than Non-leguminous forbs to nitrogen addition. The synthetic dominated ratio (SDR) of grasses increased, and that of non-leguminous forbs decreased with the increase of nitrogen, whereas the SDR of sedges and leguminous forbs were not significantly affected by N-fertilizer. Plant diversity decreased and forage quality increased with the increase of nitrogen. Index of meadow quality (IMQ) was the highest at 150kg N/hm~2 plot, and showed no significant difference between 150 and 300kg N/hm~2 plot. Excessive nitrogen application did not improve the IMQ. Response of above-ground biomass of plant groups was lagged when compared with plant diversity and IMQ. Total above-ground biomass was significant increased with the nitrogen application. There were different responses of above-ground biomass among plant groups to the nitrogen application. The results showed that the above-ground biomass of grasses was significantly increased with N-fertilizer application, and that of forbs was decreased. The responses of plant groups to nitrogen application were more affected by precipitation and its distribution in July, therefore, the status of soil water after nitrogen application was a key factor to the responses of plant groups.
来源 草地学报 ,2002,10(1):7-17 【扩展库】
关键词 高寒矮嵩草草甸 ; 施氮 ; 多样性 ; 草甸质量 ; 地上生物量
地址

1. 中国科学院西北高原生物研究所, 西宁, 810001  

2. 中国科学院植物研究所, 北京, 100093

语种 中文
文献类型 研究性论文
ISSN 1007-0435
学科 畜牧、动物医学、狩猎、蚕、蜂
基金 国家973计划 ;  中国科学院知识创新工程项目 ;  中国科学院海北高寒草甸生态系统实验站基金
文献收藏号 CSCD:959590

参考文献 共 22 共2页

1.  Shaver G R. Effect of fertilizer on production and biomass of tussock tundra, Alaska. USA. Arctic and Alpine Research,1985,18:2611-268 被引 1    
2.  Chapin III F S. Individualistic growth response of tundra plant species to environmental manipulations in the field. Ecology,1985,66:565-576 被引 1    
3.  Wilson S D. Interactive effects of fertilization and disturbance on community structure and resource availability in an old-field community. Oecologia,1991,88:61-71 被引 8    
4.  Samuel M J. Nitrogen fertilization, botanical composition and biomass production on mixed-grass rangeland. Journal Range Management,1998,51:408-415 被引 5    
5.  Bliss L C. Arctic and alpine plant life cycles. Annual Review of Ecology and Systematics,1971,2:405-438 被引 12    
6.  Hozmann H P. Contribution of nitrogen fixation to nitrogen nutrition in an alpine sedge connunity (Caricetum curvulae). Oecologia,1988,76:298-302 被引 1    
7.  Bowman W D. Constraints of nutrient availability on primary production in two alpine tundra communities. Ecology,1993,74:2085-2097 被引 30    
8.  Theodose T A. Nutrient availability, plant abundance, and species diversity in two alpine tundra communities. Ecology,1997,78(6):1861-1872 被引 17    
9.  鲍新奎. 土壤氮、磷养分对矮嵩草草甸初级生产力影响的初步研究. 高寒草甸生态系统国际学术讨论会论文集,1989:169-175 被引 2    
10.  张松林. 施肥对矮嵩草草甸草场地上生物量的影响. 高原生物学集刊,1986,5:7-12 被引 13    
11.  杨福囤. 高寒草甸生态系统定位站自然概况. 高寒草甸生态系统.1,1982:1-8 被引 15    
12.  李英年. 海北高寒草甸生态系统定位站气候概述. 资源生态环境网络研究动态,1998,9:30-33 被引 18    
13.  姜恕. 草地生态学研究方法,1988:4-47 被引 1    
14.  张大勇. 甘南山地草原人工草场的演替. 植物生态学与地植物学学报,1990,14(2):103-109 被引 32    
15.  史顺海. 矮嵩草草甸主要植物种群物候观测和生物量测定. 高寒草甸生态系统国际学术讨论会文集,1989:49-60 被引 5    
16.  王启基. 高寒草甸C3、C4植物叶片解剖特征初步研究. 高原生物学季刊,1985,4:1-10 被引 8    
17.  Aerts R. Nitrogen use efficiency in relation on nitrogen availability and plant community composition. Causes and consequences of variation in growth rate and productivity of higher plant,1989:285-297 被引 1    
18.  Chapin F S III. The mineral nutrition of wild plants. Annual Review of Ecology and Systematics,1980,11:233-260 被引 200    
19.  Bowman W D. Shoot growth dynamics and photosynthetic response to increased nitrogen availability in the alpine willow, Salix glauca. Oecologia,1994,97:93-99 被引 6    
20.  Goldberg D E. Effects of different resource additions on species diversity in an annual plant community. Ecology,1990,71:213-225 被引 64    
引证文献 36

1 周华坤 封育措施对退化与未退化矮嵩草草甸的影响 中国草地,2003,25(5):15-22
被引 50

2 江小蕾 不同干扰类型对高寒草甸群落结构和植物多样性的影响 西北植物学报,2003,23(9):1479-1485
被引 98

显示所有36篇文献

论文科学数据集
PlumX Metrics
相关文献

 作者相关
 关键词相关
 参考文献相关

iAuthor 链接
周华坤 0000-0002-9718-8550
版权所有 ©2008 中国科学院文献情报中心 制作维护:中国科学院文献情报中心
地址:北京中关村北四环西路33号 邮政编码:100190 联系电话:(010)82627496 E-mail:cscd@mail.las.ac.cn 京ICP备05002861号-4 | 京公网安备11010802043238号