作　　者： ; ; ;

机构地区： 中国气象局兰州干旱气象研究所

出　　处： 《中国生态农业学报》 2005年第4期71-73,共3页

摘　　要： 对黄土高原本氏针茅叶片光合特性及生产力状况研究结果表明,本氏针茅前期生长较慢,5月初至7月初为快速生长期,最高株高可达92.2cm,最高日增长量达1.67cm。本氏针茅生物量季节动态呈单峰曲线,8月份达最大值(822.5g/m2),其中非光合器官占比重较大。其叶片光合、蒸腾特性受环境因子的影响而呈规律性变化,光合速率、蒸腾速率及气孔导度日进程均表现为双峰曲线,且光合午休同时受气孔和非气孔因素的限制。 Photosynthesis characteristics and productivity of Stipa bungeana were studied. The results show that in the early period, Stipa bungeana grow slowly, then from the early May to the early July, it does fast. Its height can reach 92.2cm and the maximum of its daily increased height is 1.67cm. The seasonal dynamic of biomass is a single-humped curve and reaches the top in August and the non-photosynthesis occupies the more proportion. Due to the environmental influence,photosynthesis and transpiration change regularly and their daily variations can be expressed as a two-humped curve. The midday reduction＇ of photosynthesis rate is limited by stomatic and non-stomatic factors.

关 键 词： 本氏针茅 光合特性 生产力 黄土高原 针茅 气孔导度 前期生长 单峰曲线 季节动态 光合器官

领　　域： [农业科学] [农业科学] [农业科学]