LED红蓝组合光谱下强光照射时长及频率对生菜生长及营养元素吸收的影响

doi:10.3964/j.issn.1000-0593(2021)09-2853-06

Abstract
References
Related Citation (15)

Download: PDF (2008 KB)
Export: BibTeX | EndNote (RIS)

Abstract As the largest band of light absorption of plant photosynthetic pigment, the red and blue spectrum is the main function spectrum of plant photosynthesis, and red-blue LED has become the mainstream light source of plant factories. The response of plants to red-blue light and its mechanism needs to be explored. In this study, effects of high light duration and alternating frequencies of high light supplied with red-blue LEDs on growth and nutrient element content as well as accumulation of hydroponic lettuce were conducted using ICP-AES analysis technology in an artificial plant factory. Five treatments were set up in experiment 1: high light (500 μmol·m^-2·s^-1) was irradiated for 0 h (CK), 0.5 h (HL0.5), 1 h (HL1), 2 h (HL2) and 4 h (HL4) in the middle of the light period (150 μmol·m^-2·s^-1), respectively. In experiment 2, set up one conventional treatment (NL, 170 μmol·m^-2·s^-1) and four alternate light treatments, in which 1 h high light was separated into four different alternating frequencies: one time (A1), three times (A3), six times (A6) and twelve times (A12). The light quality (4R∶1B), photoperiod (16/8 h), and treatment days (20 days) were the same in the two experiments. The results showed that the biomass production and the accumulation of nutrients of lettuce such as N，C，P，K，Ca，Mg increased first and then decreased with the increase of high light duration. Compared with the CK, the root dry and fresh weight, and specific leaf weight of lettuce grown under HL4, increased significantly, and the leaf area decreased significantly. The dry weight of lettuce and the accumulation of N，C，P，K，Ca and Mg were the highest under HL2. Compared with NL treatment, A6 significantly reduced the fresh weight and increased the root shoot ratio of lettuce, but there was no significant difference among other treatments. The alternating light treatments significantly increased the C element content of lettuce, but the alternating frequencies of high light had no significant effect on the biomass production and the accumulation of nutrient elements. In conclusion, applying a short-term continuous high light irradiation in the middle of the light period can effectively improve the accumulation of nutrients and biomass production in lettuce and is more suitable for lettuce cultivation in plant factories.

Key words：ICP-AES; High light irradiation; Hydroponic lettuce; Nutrient absorption

Received: 2020-04-26 Accepted: 2020-08-19

ZTFLH:

O657.3

Corresponding Authors: LIU Wen-ke E-mail: liuwenke@caas.cn

Cite this article:

URL:

https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2021)09-2853-06 OR https://www.gpxygpfx.com/EN/Y2021/V41/I09/2853

[1] Kozai T. Proceedings of the Japan Academy，2013，89（10）：447.
[2] Hu M，Chen Y，Huang L. International Journal of Production Economics，2014，152：49.
[3] Pfündel E，Baake E. Photosynthesis Research，1990，26（1）：19.
[4] Massa G D，Kim H H，Wheeler R M，et al. Hortscience，2008，43：1951.
[5] Li Q，Kubota C. Environmental and Experimental Botany，2009，67（1）：59.
[6] Chen X，Yang Q，Song W，et al. Scientia Horticulturae，2017，3：4.
[7] Kuno Y，Shimizu H，Nakashima H，et al. Environment Control in Biology，2017，55（3）：129.
[8] Jshi T，Kimura K，Matsuda R，et al. Scientia Horticulturae，2016，98：27.
[9] Fu W，Li P，Wu Y，et al. Horticultural Science，2012，39（3）：129.
[10] Oh M M，Carey E E，Rajashekar C B. Plant Physiology and Biochemistry，2009，47（7）：578.
[11] Pérez-López U，Sgherri C，Miranda-Apodaca J，et al. Plant Physiology and Biochemistry，2018，123：233.
[12] WANG Hong，JIN Ji-yun（汪洪，金继运）. Plant Nutrition and Fertilizer Science（植物营养与肥料学报），2006, 12(5): 738.
[13] Cakmak I，Marschner H. Plant Physiology，1992，98: 1222.
[14] SUN Ke-xiang，YANG Sha，GUO Feng，et al（孙克香，杨莎，郭峰，等）. Plant Physiology Journal（植物生理学报），2015，51 (3)：280.
[15] The State Forestry Administration of the People’s Republic of China（中华人民共和国国家林业局）. Determination of Forest Soil Nitrogen（森林土壤氮的测定）. Beijing: China Standards Press（北京：中国标准出版社）.
[16] Li T，Heuvelink E，van Noort F，et al. Scientia Horticulturae，2014，179：306.
[17] Marcelis L F，Heuvelink E，Goudriaan J. Scientia Horticulturae，1998，74（1-2）：83.
[18] Cakmak I, Kirkby E A. Physiologia Plantarum, 2008, 133; 692.
[19] Mancinelli A L，Rabino I. The Botanical Review，1978，44（2）：129.