作　　者： ; ; ; ;

机构地区： 中国科学院寒区旱区环境与工程研究所甘肃省干旱气候变化与减灾重点实验室

出　　处： 《草业科学》 2005年第6期58-61,共4页

摘　　要： 研究了刈割对芨芨草Achnatherumsplendens生长状况及光合生理特征方面的影响,结果表明:刈割对芨芨草叶片生长、生物量积累及生理特征存在明显的影响。同试验前一年未刈割的芨芨草株丛相比,刈割过的芨芨草株丛各叶位叶片长度、叶面积均较小,单位叶面积的干质量也较少;营养枝及生殖枝的茎基粗分别减少了1.1%～5.5%,1.7%～13.5%;其总生物量、同化器官生物量及非同化器官生物量分别降低了7.9%,15.1%和1.3%;在整个生育期刈割过的芨芨草株丛光合速率及蒸腾速率也较未刈割过的株丛减少了2.9%～29.5%,4.3%～23.6%。 The influence of cutting on the growth and photosynthetic characteristics was studied The results showed that cutting had distinct effect on leaf growth, biomass accumulation and photosynthesis Compared to non cutting treatment in last year, leaf length, leaf area and dry weight per unit leaf area were less, basal stem wide of nutrition and breeding branch reduced 1 1%~5 5%,1 7%~ 13 5% , respectively, and its total biomass, assimilation and non assimilation organ biomass decreased 7 9%,15 1%,1 3 % , respectively In addition, photosynthesis rate and transpiration rate reduced 2 9%~29 5%,4 3%~23 6%

关 键 词： 芨芨草 刈割 生长

领　　域： [农业科学]