首页 | 本学科首页   官方微博 | 高级检索  
   检索      

青海海北地区矮嵩草草甸生物量和能量的分配
引用本文:杨福囤,王启基,史顺海.青海海北地区矮嵩草草甸生物量和能量的分配[J].植物生态学报,1987,11(2):106-112.
作者姓名:杨福囤  王启基  史顺海
作者单位:中国科学院西北高原生物研究所,中国科学院西北高原生物研究所,中国科学院西北高原生物研究所
摘    要: 此项研究工作于1980年在海北高寒草甸生态系统定位站进行。本文研究了青藏高原地区分布面积广、草质优良,在畜牧业生产中有重要意义的矮嵩草草甸的生物量和它的能量分配关系,测定了地上,地下生物量和不同物候期主要植物类群的热值含量。研究结果表明:矮嵩草草甸生物量的季节动态较为明显,地上生物量随生长季节的水热条件和植物的生长发育阶段而变化,9月初地上生物量达到峰值(296.66g/m2),此后生物量逐渐减少,到枯黄前而停止;地下根系生物量在返青期较高,生长旺盛期最低,枯黄期最高,这同植物生长发育阶段的物质运转有关。矮嵩草草甸主要植物类群的热值以生长旺盛期最高,枯黄期次之,返青期较低;各类草的热值,以莎草类最高,禾草类次之,杂类草最低。矮嵩草草甸总初级生产量为909.49g/m2·年,其中地上为296.66g/m2·年,地下为596.67g/m2·年,枯枝落叶为16.16g/m2·年。群落在不同生长期所固定的太阳能数值不一,以枯黄前所固定的太阳能为最多,生长期整个群落的光能利用率为0.295%。

关 键 词:矮嵩草  生物量  能量

THE ALLOCATION OF THE BIOMASS AND ENERGY IN KOBRESIA HUMILIS MEADOW,HAIBEI DISTRICI,QINGHAI PROVINCE
Yang Fu-tun Wang Qi-ji Shi Shun-hai.THE ALLOCATION OF THE BIOMASS AND ENERGY IN KOBRESIA HUMILIS MEADOW,HAIBEI DISTRICI,QINGHAI PROVINCE[J].Acta Phytoecologica Sinica,1987,11(2):106-112.
Authors:Yang Fu-tun Wang Qi-ji Shi Shun-hai
Abstract:This work was carried out at the Haibei research station of alpine meadow ecosystem in 1980.Not only the distribution range of the Kobresia humilis alpine meadow on the Qinghai-Xizang plateau is wides- pread, its quality is also excellent.It occupies a very important place in animal husbandry.We have investigated the allocation of the biomass and energy in Kobresia humilis meadow.We measured the biomass dyna- mics of above-underground by periodical harvest method, and the plants caloric values at different phenological stages were determined by JR- 2800 bomb calorimeter.The result expressed:the biomass seasonal dynamics was obvious in Kobresia humilis meadow, the biomass of abov- eground varied with water and thermal conditions as well as growing development stages of the plants.The biomass above ground achieved peak value(206.66g/m~2)on the 1st of September;Then the biomass gradual decreased until ceased before withering.The biomass of underground was medium durint the reviving period, minimum during flourishing period, maximum during the withering period.This concerned the growing development stages and organic matter transport.The plant's caloric value in Kobresia humilis was maximum during flourishing period, medium during the withering period, minimum during the reviving period.The caloric values of plant groups:sedges was maximum, grasses medium, forbs minimum.The net primary production in Kobresia humilis meadow was 909.49g/m~2.a;among others, aboveground part was 296.66g/m~2.a; the underground was 596.67g/m~2.a.and litter was 16.16g/m~2.a;the solar energy storage of community was different in different growing period; the solar energy storage was maximum before the withering period.The utilization rate of solar energy in Kobresia humiIis meadow was 0.295 per cent during the gowing season.
Keywords:Kobresia humilis  Biomass  Energy  
本文献已被 CNKI 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
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号