Application of Supplementary Light in Winter in Growth and Quality Improvement of Strawberry in Solar Greenhouse

doi:10.11924/j.issn.1000-6850.casb2024-0322

Abstract

Abstract:

In order to solve the negative influence of weak light in solar greenhouse on the yield and quality of strawberry in winter and spring in northern China, the supplementary light was set inside the greenhouse [supplementary light intensity was (20±3) μmol/(m²·s), supplementary light duration was 3 h/d, T1] for strawberries, and no supplementary light treatment was set as control (CK). The results showed that the supplementary light treatment significantly promoted the increase of plant height and photosynthetic pigment content in strawberry leaves, and the chlorophyll a content, chlorophyll b content, total chlorophyll content, and carotenoid content in strawberry leaves increased by 27.3%, 35.9%, 21.7%, and 19.4%, respectively. Absorption flux per reaction center (ABS/RC), trapped energy flux per RC (TR₀/RC) and dissipation energy flux per RC (DI₀/RC) decreased by 13.5%, 7.6%, and 20.0%, respectively, which indicated that the pigment unit of strawberry leaf antenna absorbed and captured less light energy, resulting in less light energy for electron transport. Compared with strawberry plants grown without supplementary light, the energy loss of photochemical reaction in strawberry leaves was significantly reduced by supplementary light. The contents of soluble protein, soluble sugar, and vitamin C in strawberry fruit treated with supplementary light increased by 56.1%, 6.8%, and 3.1%, respectively, compared with those treated without supplementary light. In terms of the influences of volatile substances, the nitrogen oxides, alkanes, sulphide, alcohols and aromatic compounds, alkanes and aliphatic groups increased by 15.3%, 16.2%, 10.6%, 6.8%, and 6.7%, respectively, compared with the no supplementary light treatment. In conclusion, solar greenhouse supplementary light treatment significantly promoted the growth of strawberry plants, the improvement of strawberry fruit quality and the accumulation of flavor substances.

Key words: strawberry, solar greenhouse, supplementary light treatment, chlorophyll fluorescence, PSII, yield, volatile substance, soluble solid

LI Zhixin, WANG Long, LI Xin, TAN Nengzhi, CHEN Jingliang, CHEN Yujia, YANG Yanjie, YAN Zhengnan, ZHANG Yuhan. Application of Supplementary Light in Winter in Growth and Quality Improvement of Strawberry in Solar Greenhouse[J]. Chinese Agricultural Science Bulletin, 2025, 41(4): 50-55.

Figures/Tables 7

References 32

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编号	传感器	敏感物质
S1	W1C	芳烃化合物
S2	W5S	氮氧化物
S3	W3C	氨和芳香族
S4	W6S	氢化物
S5	W5C	烯烃、芳香族、极性分子
S6	W1S	烷类
S7	W1W	硫化物
S8	W2S	醇和部分芳香族化合物
S9	W2W	芳烃化合物和硫化物
S10	W3S	烷类和脂肪族

编号	传感器	敏感物质
S1	W1C	芳烃化合物
S2	W5S	氮氧化物
S3	W3C	氨和芳香族
S4	W6S	氢化物
S5	W5C	烯烃、芳香族、极性分子
S6	W1S	烷类
S7	W1W	硫化物
S8	W2S	醇和部分芳香族化合物
S9	W2W	芳烃化合物和硫化物
S10	W3S	烷类和脂肪族

处理	株高/cm	单果重/g
CK	15.66±1.25b	17.77±1.98b
T1	21.56±2.68a	24.08±1.55a

处理	株高/cm	单果重/g
CK	15.66±1.25b	17.77±1.98b
T1	21.56±2.68a	24.08±1.55a

处理	叶绿素a含量/(mg/g)	叶绿素b含量/(mg/g)	总叶绿素含量/(mg/g)	类胡萝卜素含量/(mg/g)	SPAD
CK	1.76±0.04b	0.64±0.05b	2.35±0.07b	0.36±0.01b	47.47±2.93b
T1	2.24±0.12a	0.87±0.06a	2.86±0.29a	0.43±0.03a	54.40±3.44a