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林业资源管理 ›› 2021›› Issue (4): 149-156.doi: 10.13466/j.cnki.lyzygl.2021.04.019

• 技术应用 • 上一篇    下一篇

聚天冬氨酸保水剂对胡杨光合特性的影响

朱梦真1(), 韩路1(), 代雅琦2, 马晓燕1, 冯宇2, 张丹丹2   

  1. 1.塔里木大学 植物科学学院,新疆 阿拉尔 843300
    2.塔里木大学 生命科学学院,新疆 阿拉尔 843300
  • 收稿日期:2021-06-16 修回日期:2021-07-14 出版日期:2021-08-28 发布日期:2021-09-26
  • 通讯作者: 韩路
  • 作者简介:朱梦真(1997-),女,河南扶沟人,在读硕士,研究方向为资源利用。Email: 2817125321@qq.com
  • 基金资助:
    兵团区域创新计划(2018BB047)

Effects of Polyaspartic Acid Water-Retaining Agent on Photosynthetic Characteristics of Populus euphratica

ZHU Mengzhen1(), HAN Lu1(), DAI Yaqi2, MA Xiaoyan1, FENG Yu2, ZHANG Dandan2   

  1. 1. College of Plant Science,Tarim University,Alar,Xinjiang 843300,China
    2. College of Life Science,Tarim University,Alar,Xinjiang 843300,China
  • Received:2021-06-16 Revised:2021-07-14 Online:2021-08-28 Published:2021-09-26
  • Contact: HAN Lu

摘要:

水分是影响干旱区荒漠植被恢复和造林成败的关键因素。试验于2020年8月中旬在新疆维吾尔自治区阿拉尔市塔里木大学试验站进行,以塔里木荒漠生态关键种—胡杨2年生幼苗为试材,田间采用随机区组试验,研究根施不同用量聚天冬氨酸保水剂(PASA)对胡杨幼苗生长、光合气体交换和光合作用—光响应特性的影响。结果表明,根施PASA保水剂明显提高胡杨幼苗叶片和根际土壤含水量,其中根施10g/株处理下胡杨叶片与土壤含水量最高,分别高于CK(不施PASA)6.11%,483.54%。胡杨净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)日变化均呈“M”变化,瞬时水分利用效率(WUEinst)呈“L”变化,表现出明显的光合午休现象,而根施PASA胡杨Pn,Gs,Tr,WUEinst峰值,日均值均高于CK。根施PASA10g/株胡杨Pn,Gs,Tr,以及WUEinst、表观量子效率(AQY)、光饱和点(LSP)、最大净光合速率(Pnmax)和总生物量(TB)、气孔长度(SAL)均最高,分别高于CK 27.48%,50%,20.84%,18.99%,87.14%,88.90%,31.93%,230.54%,22.95%。明显提高了胡杨光合效率、生物量和瞬时水分利用效率,扩大了光照生态幅。因此,干旱区造林推荐PASA使用量为10g/株。

关键词: 极端干旱区, 保水剂, 胡杨, 光合作用, 生物量

Abstract:

Moisture is the key factor affecting the success or failure of desert vegetation restoration and afforestation in arid area.The experiment was carried out in mid-August 2020 at the experimental station of Tarim University in Alar City,Xinjiang Autonomous Region.Two-year-old seedlings of Populus euphratica,a key ecological species in the Tarim desert,were used as test materials,and a randomized block test was used in the field.This paper studied the effects of different dosages of polyaspartic acid water retention agent(PASA) on the growth,photosynthetic gas exchange and photosynthesis-light characteristics of Populus euphratica seedlings.The results showed that PASA significantly improved the leaf and soil water content of Populus euphratica,especially those treated with PASA 10g/plant were the highest,and the mean value of PASA 10g/plant were 6.11% and 483.54% higher than that of CK(without PASA) respectively.The diurnal variation of net photosynthetic rate(Pn),stomatal conductance(GS) and transpiration rate(Tr) showed an "M" variation,and instantaneous water use efficiency(WUEinst) showed an "L" variation,showing an obvious photosynthetic nap phenomenon.The peak values of Pn,GS and Tr were all higher than those of CK.Pn,Gs,Tr,WUEinst,apparent quantum efficiency(AQY),light saturation point(LSP),maximum net photosynthetic rate(Pnmax),total biomass(TB) and stomatal length(SAL) of Populus euphratica treated with PASA 10g/plant were 27.48%,50%,20.84%,18.99% 87.14%,88.90%,31.93%,230.54%,22.95% higher than those of CK respectively.The results showed that the photosynthetic efficiency,biomass and instantaneous water use efficiency of Populus euphratica were significantly improved,and the illumination ecological amplitude was expanded.Therefore,the recommended dosage of PASA for afforestation in arid area is 10g/plant.

Key words: extreme arid area, super absorbent polymers, Populus euphratica, photosynthesis, biomass

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