干旱区研究2018，Vol.35Issue(2)：379-386,8.DOI:10.13866/j.azr.2018.02.16
罗布泊腹地人工植被梭梭的光学特性及其对干旱胁迫的响应
Photosynthetic Characteristics and Response of Haloxylon ammodendron to Drought Stress in Hinterland of the Lop Nur
摘要
Abstract
It is important to understand the photosynthetic process of Haloxylon ammodendron growing in the hin-terland of the Lop Nur and its adaptation to environment. In this study, the photosynthetic characteristics and re-sponse of planted H.ammodendron to drought stress were revealed, and a suitable irrigation period was established. Three drought treatments were designed: i.e.the slight, moderate and heavy drought treatments.The results are as follows: ① Under heavy drought, LCP and LSP of H.ammodendron were 118.75 μmol·m-2·s-1 and 6174.79 μmol·m-2·s-1 respectively, which were the largest use of light energy in these three treatments.It means that, in an adverse environment, H.ammodendron expanded the scope of available light energy to improve the efficiency of using environmental resources; ②In the slight and moderate drought treatments after irrigation, the Pnmax values of H.ammodendron were 35.06 μmol·m-2·s-1 and 49.51 μmol·m-2·s-1, increased by 48.81％ and 22.83％, respectively, and higher than those in drought.It could be seen that water supply is an important factor affecting plant growth in this region; ③ There was a long-duration midday depression of photosynthesis of H.ammodendron under drought stress, which might be an adaption to environment; ④The difference of daily photosynthetic process between slight and moderate drought treatments was not significant, and the physiological indexes of photosynthesis were rapidly increased after irrigation.Considering to saving water, the moderate drought is the most suitable irriga-tion schedule.关键词
梭梭(Haloxylon ammodendron)/干旱胁迫/光合特性/水分利用效率/罗布泊腹地Key words
Haloxylon ammodendron/drought stress/photosynthesis/water use efficiency/Lop Nur Hinterland引用本文复制引用
杨司睿,范井伟,孙永强,李从娟,徐新文,范敬龙,王世杰,张恒,翟志忠..罗布泊腹地人工植被梭梭的光学特性及其对干旱胁迫的响应[J].干旱区研究,2018,35(2):379-386,8.基金项目
新疆维吾尔自治区科技支撑项目(201433101) （201433101）
