平茬处理对油蒿群落冠层结构的影响  

Effect of Stumping Treatment on Canopy Structure of Artemisia ordosica

作　　者：刘志芳[1] 尹强[2] 王慧[2] 阿拉腾图拉古日 闫志坚[2] LIU Zhi - fang YIN Qiang WANG Hui Alatengtulaguri YAN Zhi - jian(College of Life Science and Technology, Inner Mongolia Normal University, Hohhot 010022, China Institute of Grassland re- search of CAAS, Hohhot 010010, China)

机构地区：[1]内蒙古师范大学生命科学与技术学院,内蒙古呼和浩特010022 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010

出　　处：《内蒙古林业科技》2016年第4期24-26,共3页Journal of Inner Mongolia Forestry Science and Technology

基　　金：中国农业科学院科技创新工程草原非生物灾害防灾减灾团队(CASS-ASTIP-IGR2015-04);现代农业产业体系项目(CARS-35);内蒙古自治区研究生创新资助项目(CXJJS15089)资助

摘　　要：通过对库布齐沙漠的油蒿群落进行平茬处理,研究了平茬后油蒿群落冠层结构的变化。结果表明:在生长旺季7月和8月上旬,平茬油蒿的叶面积指数(LAI)显著高于未平茬油蒿的值(P<0.05),反映出平茬处理后油蒿的叶面积指数增大,提高了光能利用能力;平茬油蒿群落的天空开度(DIFN)显著低于未平茬油蒿群落的值(P<0.05),说明平茬处理有利于油蒿枝叶更新,使其新生枝叶的生长更为茂密。总的来说,平茬在一定程度上改善了油蒿群落的冠层结构,提高了油蒿群落对光能的利用率,有利于油蒿的生长。After stumping treatment on Artemisia ordosica community in Kubuqi Desert, the change of canopy struc- ture of Artemisia ordosica community has been studied. The results show that in July and August the LAI of Artemis- ia ordosica with stumping treatment is significantly higher than the one without stumping treatment （ P 〈 0. 05 ）, which reflects the light use capability has been improved with the increase of leaf area index after stumping treat- ment. The DIFN of Artemisia ordosica community after stumping treatment is obviously lower than the one without stumping treatment （ P 〈 0. 05 ）, which shows that stumping treatment can be beneficial to the regeneration of bran- ches and leaves of Artemisia ordosica. In general, stumping treatment can improve the canopy structure of Artemisia ordosica community to some extent and enhance the light use capability, which are beneficial to the growth of Arte- misia ordosica.

关 键 词：平茬处理 油蒿 冠层结构 

分 类 号：S793[农业科学—林木遗传育种]