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中国农学通报

中国农学通报 ›› 2016, Vol. 32 ›› Issue (16): 12-17.doi: 10.11924/j.issn.1000-6850.casb16010149

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

青海4种抗旱树种水分利用效率对水分和光照的响应

白灵娜1,2,王占林1,2,贺康宁3,樊光辉1,2,张得芳1,2,谢守忠4   

  1. (1青海大学,西宁 810016；2青海省农林科学院/青海高原林木遗传育种实验室,西宁 810016；3北京林业大学,北京100083；4青海诺木洪农场,青海都兰 816102）
  • 收稿日期:2016-01-30 修回日期:2016-05-04 接受日期:2016-02-24 出版日期:2016-06-17 发布日期:2016-06-17
  • 通讯作者: 王占林
  • 基金资助:
    青海省重大科技专项”柴达木盆地盐碱地造林技术研究与示范”(2014-NK-A4-4)。

Responses of Water Use Efficiency of 4 Drought Resistant Tree Species to Water and Light in Qinghai

Bai Lingna1,2, Wang Zhanlin1,2, He Kangning3, Fan Guanghui1,2,Zhang Defang1,2,Xie Shouzhong4   

  1. (1Qinghai University,Xining810016;2Qinghai Academy of Agriculture and Forestry Sciences/Laboratory of Forest Genetics and Breeding of Qinghai Plateau, Xining 810016; 3Beijing Forestry University, Beijing 100083；4Nuomuhong Farm in Qinghai,Dulan Qinghai 816102)
  • Received:2016-01-30 Revised:2016-05-04 Accepted:2016-02-24 Online:2016-06-17 Published:2016-06-17

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摘要： 为研究4种青海乡土树种的水分利用效率与水分和光辐射之间的关系，试验采用Li-6400光合测定仪测定净光合速率和蒸腾速率，并计算水分利用效率。结果显示，青海4个抗旱树种获得最大水分利用效率时的土壤湿度在16%~18%之间，光合有效辐射在1300~1600 μmol/(m2·s)之间；比较红砂、洛基山刺柏、沙地柏和沙枣在同等土壤湿度情况下的水分利用效率，表明沙枣较其他3个高原树种更容易获得较大水分利用效率，即使在干旱土壤环境，沙枣对水分的利用情况也优于其他3个树种。表明，虽然青海4个抗旱树种均具有耐贫瘠、适应干旱环境的能力，但沙枣在高原极干旱地区适应环境能力更强，可通过速生树种与抗旱树种相结合的造林方式，缓解荒漠地区树种匮乏的压力，实现沙化土地的复绿工作。

关键词: 全球气候变暖, 全球气候变暖, 秦岭地区, 陕西, 热量资源, 时空变化

Abstract: In order to study the relationship between water use efficiency and soil water and light of 4 local tree species in Qinghai, the authors used Li-6400 photosynthetic apparatus to measure the net photosynthetic rate and transpiration, and calculated the water use efficiency. The results showed that: the 4 drought resistant tree species in Qinghai obtained the maximum water use efficiency when the soil moisture was from 16% to 18%, and the photosynthetic active radiation was between 1300 and 1600 μmol/(m2·s). Comparing the water use efficiency of Reaumuria sorgarica Maxim., Elaeagnus angustifolia Linn., Sabina vulgaris and Junipreus scopulorum under the same soil moisture condition, it showed that Elaeagnus angustifolia Linn. had higher water use efficiency than the other 3 tree species, even in drought soil environment. The results indicated that although the 4 drought resistant tree species in Qinghai were able to adapt to drought environment, but Elaeagnus angustifolia Linn. got stronger adaptability to the extremely arid area in plateau. Therefore, drought resistance tree species and fast-growing tree species could be used together in afforestation, to alleviate the lack of tree species in desert area and realize the re-green work in desertification land.