| 松嫩平原羊草草原凋落物层群落学作用的研究 |
| |
| 引用本文： | 郭继勋,孙刚,姜世成.松嫩平原羊草草原凋落物层群落学作用的研究[J].植物生态学报,2000,24(4):473-476. |
| |
| 作者姓名： | 郭继勋 孙刚 姜世成 |
| |
| 作者单位： | 东北师范大学草地研究所!长春130024 |
| |
| 基金项目： | 国家自然科学基金资助项目 !( 3 9670 5 2 8) |
| |
| 摘 要： | 植物的萌发数量与凋落物量呈抛物线型，峰值出现在200g·m-2处，凋落物对植物萌发影响主要是通过影响地表温度和土壤水分而起作用。群落的物种数随着凋落物量增加而增加，峰值出现在800g·m-2处，种饱和度达14种·m-2，峰值后略有下降。群落优势种羊草(Aneurolepidium chinense)的密度、平均高度、盖度和地上生物量随凋落物量的变化趋势基本相同，峰值出现在600g·m-2左右。凋落物层对群落的演替动态有一定的影响，凋落物量相近的样地差异较小，随着凋落物量的增加，群落间差异越来越大。群落地上和地下生物量随凋落物量的变化呈单峰曲线，地上生物量峰值出现在600g·m-2处，地下生物量出现在700g·m-2处，地下生物量/地上生物量值随凋落物量变化呈V字型，最小值出现在550g·m-2左右。
|
| 关 键 词： | 凋落物层 羊草群落 种类组成 数量特征 |
STUDY ON EFFECT OF LITTER LAYER ON COMMUNITY IN ANEUROLEPIDIUM CHINENSE GRASSLAND IN SONGNEN PLAIN |
| |
| GUO Ji-XunE-mail:gjixun@nenu.edu.cn,SUN Gang and JIANG Shi-Cheng.STUDY ON EFFECT OF LITTER LAYER ON COMMUNITY IN ANEUROLEPIDIUM CHINENSE GRASSLAND IN SONGNEN PLAIN[J].Acta Phytoecologica Sinica,2000,24(4):473-476. |
| |
| Authors: | GUO Ji-XunE-mail:gjixun@nenueducn SUN Gang and JIANG Shi-Cheng |
| |
| Abstract: | Seasonal change in litter weight and number of germinating plants showed a parabolic form. The peak number germinating was 200g·m-2. Litter effected germination via its influence on surface temperature and soil water. The number of species present in the community increased with increasing litter weight up to a peak value of 800 g·m-2: species saturation occurred at 14·m-2 , then decreased. Changes in the density, average height, coverage and aboveground biomass of dominant species with litter weight were basically similar and each peaked at around 600g·m-2. The litter layer had a strong influence upon the dynamics of community succession. The difference between plots in which litter weight was low was small, while communities diverged as litter weight increased. The changes of aboveground biomass and underground biomass of community with litter weight showed a single peak at 600g·m-2 and 700 g·m-2 respectively. Underground and aboveground biomass both varied with litter weight in a ‘V’ type pattern with the lowest value around 550 g·m-2 . |
| |
| Keywords: | Litter layer Aneurolepidium chinense commun ity Species composition Quantity character Biomass |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物生态学报》浏览原始摘要信息 |
|
点击此处可从《植物生态学报》下载免费的PDF全文 |
