Physiological and Ecological Effect of Covering Tea Garden with Light Conversion Film During Low Temperature Period in Winter and Spring

doi:10.11924/j.issn.1000-6850.casb2022-0949

Abstract

Abstract:

The physiological and ecological effects of light conversion film in greenhouse tea garden in winter and spring were studied to provide basis for the application of light conversion film in greenhouse tea garden. Four treatments of common plastic film greenhouse tea garden, open-air tea garden (CK), light conversion plastic film greenhouse tea garden and light conversion plastic film greenhouse tea garden were applied with CO₂. The effects of different treatments on micro climate, tea tree development and tea quality were compared. During the film covering period, the average temperature in the shed from January to April was 3.49%-4.07% higher than CK, the average humidity was 0.03%-1.35% higher, and the light intensity was 4.71%-10.01% lower than CK. Compared with CK, the length of one bud and two leaves, weight of 100 buds, germination density and total yield of tea trees treated with light conversion film+ CO₂ increased by 12.62%, 7.30%, 13.74% and 14.75% respectively, among which the yield of spring tea and autumn tea increased by 8.77% and 24.42% respectively. The contents of amino acid, soluble sugar and tea polyphenol in fresh tea leaves treated with light conversion film + CO₂ increased significantly by 22.44%, 23.62% and 17.68% compared to CK, respectively, while the content of caffeine was significantly lower than that of CK. The average relative content of alcohols was higher, with the content of β-linalool and trans-3-hexenol significantly higher than CK. The tea garden covered with light conversion film and supplemented with CO₂ is conducive to carbon assimilation, which increases the total amount of amino acids, soluble sugar and tea polyphenols, promotes the sweet and mellow aroma of tea soup, and improves the thickness and sweetness.

Key words: light conversion film, tea, sensory quality, biochemical components, aroma components

LIU Jiayu, HU Haitao, LIU Xiaotang, CHEN Zhendong, LIANG Cheng’e, TANG Hao. Physiological and Ecological Effect of Covering Tea Garden with Light Conversion Film During Low Temperature Period in Winter and Spring[J]. Chinese Agricultural Science Bulletin, 2023, 39(34): 98-104.

Figures/Tables 8

References 26

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处理	1月	2月	3月	4月	5月	6月	7月	8月	9月
T₁	19.43	20.98	20.95	22.90	27.11	28.90	29.57	29.44	29.80
T₂	19.25	20.75	21.21	23.20	27.53	29.16	29.70	29.49	30.09
T₃	19.42	20.97	21.36	22.98	27.62	29.25	29.76	29.62	30.27
CK	18.20	19.23	21.20	22.79	26.89	28.79	29.82	29.67	30.54

处理	1月	2月	3月	4月	5月	6月	7月	8月	9月
T₁	19.43	20.98	20.95	22.90	27.11	28.90	29.57	29.44	29.80
T₂	19.25	20.75	21.21	23.20	27.53	29.16	29.70	29.49	30.09
T₃	19.42	20.97	21.36	22.98	27.62	29.25	29.76	29.62	30.27
CK	18.20	19.23	21.20	22.79	26.89	28.79	29.82	29.67	30.54

处理	1月	2月	3月	4月	5月	6月	7月	8月	9月
T₁	48.92	62.48	74.83	80.11	77.83	89.36	91.72	88.16	82.35
T₂	48.04	60.62	74.23	79.97	76.29	81.41	81.94	81.97	79.42
T₃	47.89	60.17	75.06	80.68	77.06	81.50	86.56	82.67	74.46
CK	47.83	56.76	72.60	85.59	82.16	91.39	86.98	85.60	72.59

处理	1月	2月	3月	4月	5月	6月	7月	8月	9月
T₁	48.92	62.48	74.83	80.11	77.83	89.36	91.72	88.16	82.35
T₂	48.04	60.62	74.23	79.97	76.29	81.41	81.94	81.97	79.42
T₃	47.89	60.17	75.06	80.68	77.06	81.50	86.56	82.67	74.46
CK	47.83	56.76	72.60	85.59	82.16	91.39	86.98	85.60	72.59

处理	1月	2月	3月	4月	5月	6月	7月	8月	9月
T₁	6575.28	7556.40	7196.34	7051.89	10753.33	10621.78	10440.71	11623.04	14542.12
T₂	6745.83	7687.86	7308.41	7292.67	10995.16	10840.56	10458.70	11636.13	14683.18
T₃	6908.89	8021.37	7614.09	7508.11	11205.48	10711.44	10686.77	11634.09	14747.42
CK	7105.83	8212.77	8316.67	7902.22	11220.22	11444.67	10869.14	11648.39	14891.06