Effects of High Light Duration and Frequencies on Growth and Nutrient Element Contents of Hydroponic Lettuce Cultivated Under LED Red and Blue Light

Ming-jie SHAO; Wen-ke LIU; Cheng-bo ZHOU; Qi WANG; Bao-shi LI

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

Spectroscopy and Spectral Analysis, Volume. 41, Issue 9, 2853(2021)

Effects of High Light Duration and Frequencies on Growth and Nutrient Element Contents of Hydroponic Lettuce Cultivated Under LED Red and Blue Light

Ming-jie SHAO^*, Wen-ke LIU^{1; 2; *;}, Cheng-bo ZHOU^{1; 2;}, Qi WANG^{1; 2;}, and Bao-shi LI^{1; 2;}

Author Affiliations

1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China

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Figures & Tables(8)

Fig. 1. Light supply modes of experiment 2

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Table 1. Light supply modes of experiment 1

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Table 1. Light supply modes of experiment 1

处理	光强/(μmol·m^-2·s^-1)		光照时间
处理	基础光	强光	基础光	强光
CK	150	-	6:00—22:00	-
HL0.5	150	500	6:00—13: 45; 14:15—22:00	13:45—14:15
HL1	150	500	6:00—13: 30; 14:30—22:00	13: 30—14:30
HL2	150	500	6:00—13:00; 15:00—22:00	13:00—15:00
HL4	150	500	6:00—12:00; 16:00—22:00	12:00—16:00

Table 2. Effects of high light duration on the growth of lettuce

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Table 2. Effects of high light duration on the growth of lettuce

处理	鲜重/g		干重/g		叶面积/ cm²	比叶重/ (g·dm^-2)	根冠比
处理	地上部	地下部	地上部	地下部	叶面积/ cm²	比叶重/ (g·dm^-2)	根冠比
CK	19.8bc	4.34b	1.34a	0.24b	584bc	2.0b	0.22b
HL0.5	18.9c	5.33a	1.29a	0.28ab	518cd	2.0b	0.29a
HL1	23.0a	4.38b	1.42a	0.25b	659 a	2.0b	0.19b
HL2	22.1ab	5.36a	1.51a	0.26ab	636ab	2.0b	0.24ab
HL4	17.9c	5.36a	1.27a	0.32a	470 d	2.2a	0.30a

Table 3. Effects of high light duration on the nutrient contents of lettuce

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Table 3. Effects of high light duration on the nutrient contents of lettuce

处理	N/ (g·100 g^-1)	C/ (g·100 g^-1)	P/ (g·100 g^-1)	K/ (g·100 g^-1)	Ca/ (g·100 g^-1)	Mg/ (g·100 g^-1)	Fe/ (mg·kg^-1)	Mn/ (mg·kg^-1)	Cu/ (mg·kg^-1)	Zn/ (mg·kg^-1)
CK	5.27 ab	43.78 a	1.08 a	6.91 a	1.21 b	0.24 a	134.50 ab	132.25 b	18.33 a	45.75 a
HL0.5	5.35 a	43.80 a	1.13 a	7.11 a	1.38 a	0.26 a	130.00 b	169.25 a	10.07 b	44.27 a
HL1	5.36 a	43.62 ab	1.10 a	7.51 a	1.24 b	0.25 a	151.50 a	136.25 b	11.85 ab	41.08 ab
HL2	5.17 b	44.07 a	1.06 a	7.08 a	1.21 b	0.25 a	106.25 c	142.00 ab	6.83 b	31.25 b
HL4	5.33 a	43.02 b	1.12 a	7.56 a	1.28 ab	0.25 a	118.13bc	144.75 ab	8.26 b	38.58 ab

Table 4. Effects of high light duration on nutrient accumulations of lettuce

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Table 4. Effects of high light duration on nutrient accumulations of lettuce

处理	N/mg	C/mg	P/mg	K/mg	Ca/mg	Mg/mg	Fe/μg	Mn/μg	Cu/μg	Zn/μg
CK	68.19 a	567.03 b	13.90 a	89.29 a	15.61 a	3.07 a	173.59 b	170.15 b	23.74 a	59.05 a
HL0.5	73.10 a	598.51 ab	15.46 a	97.62 a	18.90 a	3.56 a	177.74 b	230.91 a	12.82 b	57.88 a
HL1	78.27 a	636.66 ab	16.07 a	109.25 a	18.14 a	3.66 a	222.12 a	199.70 ab	17.51 ab	60.20 a
HL2	81.16 a	692.72 a	16.69 a	112.05 a	18.98 a	3.85 a	166.98 b	223.16 a	10.74 b	49.00 a
HL4	72.58 a	586.09 ab	15.18 a	102.67 a	17.40 a	3.40 a	160.73 b	195.02 ab	11.31 b	52.76 a

Table 5. Effects of alternating frequencies of high light on the growth of lettuce

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Table 5. Effects of alternating frequencies of high light on the growth of lettuce

处理	鲜重/g		干重/g		叶面积/ cm²	比叶重/ (g·dm^-2)	根冠比
处理	地上部	地下部	地上部	地下部	叶面积/ cm²	比叶重/ (g·dm^-2)	根冠比
CK	13.8 a	2.6a	0.78a	0.11a	376ab	3.67a	0.19b
A1	13.3ab	2.4a	0.74a	0.10a	382 a	3.47a	0.18b
A3	14.1 a	2.5a	0.77a	0.11a	398 a	3.54a	0.18b
A6	11.5 b	2.9a	0.66a	0.12a	331 b	3.48a	0.26a
A12	14.7 a	2.6a	0.62a	0.11a	421 a	3.49a	0.17b

Table 6. Effects of alternating frequencies of high light on the nutrient contents of lettuce

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Table 6. Effects of alternating frequencies of high light on the nutrient contents of lettuce

处理	N/ (g·100 g^-1)	C/ (g·100 g^-1)	P/ (g·100 g^-1)	K/ (g·100 g^-1)	Ca/ (g·100 g^-1)	Mg/ (g·100 g^-1)	Fe/ (mg·kg^-1)	Mn/ (mg·kg^-1)	Cu/ (mg·kg^-1)	Zn/ (mg·kg^-1)
NL	5.25 b	43.70 c	1.16 a	6.83 a	1.22 a	0.26 a	117.00 b	125.25 b	12.79 a	36.30 a
A1	5.42 ab	46.09 ab	1.25 a	6.16 a	1.09 ab	0.26 a	119.25 b	143.50 ab	5.18 a	28.68 a
A3	5.54 a	46.23 a	1.22 a	6.26 a	1.11 ab	0.27 a	141.75 a	142.50 ab	9.54 a	35.98 a
A6	5.42 ab	45.27 b	1.26 a	6.52 a	1.03 b	0.26 a	133.25 ab	164.25 a	6.15 a	32.58 a
A12	5.31 ab	45.16 b	1.11 a	6.30 a	1.02 b	0.25 a	115.68 b	128.75 b	9.21 a	31.65 a

Table 7. Effects of alternating frequencies of high light on nutrient accumulations of lettuce

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Table 7. Effects of alternating frequencies of high light on nutrient accumulations of lettuce

处理	N/mg	C/mg	P/mg	K/mg	Ca/mg	Mg/mg	Fe/μg	Mn/μg	Cu/μg	Zn/μg
NL	40.29 a	335.04 a	8.79 a	52.24 a	9.45 a	1.98 a	90.05 a	96.48 a	10.38 a	28.29 a
A1	44.09 a	372.21 a	10.20 a	49.42 a	8.92 a	2.07 a	100.88 a	123.22 a	4.54 a	24.55 a
A3	40.09 a	339.75 a	8.66 a	45.19 a	8.01 a	1.94 a	100.76 a	100.84 a	6.64 a	25.39 a
A6	37.72 a	315.11 a	8.71 a	45.31 a	7.13 a	1.76 a	92.96 a	115.72 a	4.30 a	22.70 a
A12	41.04 a	349.14 a	8.57 a	48.76 a	7.88 a	1.93 a	89.37 a	99.43 a	7.13 a	24.41 a

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Ming-jie SHAO, Wen-ke LIU, Cheng-bo ZHOU, Qi WANG, Bao-shi LI. Effects of High Light Duration and Frequencies on Growth and Nutrient Element Contents of Hydroponic Lettuce Cultivated Under LED Red and Blue Light[J]. Spectroscopy and Spectral Analysis, 2021, 41(9): 2853

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Paper Information

Category: Research Articles

Received: Apr. 26, 2020

Accepted: --

Published Online: Oct. 29, 2021

The Author Email: Ming-jie SHAO (shao_ranz@163.com)

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

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