CAJ | 학술논문

野生鸭茅(Dactylis glomerata )属多年生优良禾本科牧草,通过对分布于天山北坡不同野生鸭茅光合生理生态特性的比较,分析其在不同生长区域的生态适应性。结果表明,不同区域野生鸭茅种群的净光合速率日变化曲线均呈先降低再升高再降低趋势,11：00~12：00达到一个峰值,随之下降。光合有效辐射、蒸腾速率、气孔导度、大气温度及叶片温度测定中所有曲线日变化的峰值位置均在12：00~15：00,随后出现下降趋势。不同区域野生鸭茅种群的光能利用效率日变化动态曲线均呈现倒“V”型,在15：00左右出现低谷；水分利用效率日变换曲线整体上呈现出高-低-高-低的走势。分析表明,不同区域野生鸭茅种群对环境的适应产生了光合生理机制的差异。
야생압모(Dactylis glomerata )속다년생우량화본과목초,통과대분포우천산북파불동야생압모광합생리생태특성적비교,분석기재불동생장구역적생태괄응성。결과표명,불동구역야생압모충군적정광합속솔일변화곡선균정선강저재승고재강저추세,11：00~12：00체도일개봉치,수지하강。광합유효복사、증등속솔、기공도도、대기온도급협편온도측정중소유곡선일변화적봉치위치균재12：00~15：00,수후출현하강추세。불동구역야생압모충군적광능이용효솔일변화동태곡선균정현도“V”형,재15：00좌우출현저곡；수분이용효솔일변환곡선정체상정현출고-저-고-저적주세。분석표명,불동구역야생압모충군대배경적괄응산생료광합생리궤제적차이。
Dactylis glomerata was a kind of excellent perennial grass forages.The results of diurnal dy-namic changes indicated that the diurnal variation curve of the three regions of D.glomerata decreased first and then increased and then decreased,and reached to peak at 11:00-12:00 am and then decreased. The results of photosynthetically active radiation intensity,transpiration rate,stomatal conductance,leaf temperature and air temperature measurement showed that the peak position of the diurnal variation of all the curves was at 12:00-15:00,then followed downward trend.The light use efficiency diurnal variation curves of the three regions showed an inverted “V”type,appeared trough at around 1 5:00 noon.while,the whole day transformation curve of water use efficiency showed a high-low-high-low trend,the light use ef-ficiency and water use efficiency of D.glomerata at three regions was different.