Effects of Interaction of Shading Height and Shading Rate on Tea Garden Environment and Matcha Quality

doi:10.7668/hbnxb.20194202

Abstract

Abstract:

To improve the production quality of matcha in tea gardens,the effects of interaction of shading height and shading rate on matcha chlorophyll content,quality components,tea garden environment,etc.were studied through a field experiment,10 treatments in total,including non-shading treatment (CK),shading heights (1.0,1.5,2.0 m)of main treatments and shading rates (40%,70%,100%)of subtreatments were set. Compared with the CK,the results showed that interaction of shading height and shading rate could improve the daily average temperature,daily maximum temperature,and daily minimum temperature of the surrounding environment of tea garden.Interaction of shading height and shading rate were beneficial to reducing illuminance on the surface of tea canopy,increasing the relative chlorophyll content (SPAD value)and significantly increasing the chlorophyll content.The interaction of shading height and shading rate significantly increased the content of water extract and ammonia,and significantly decreased the content of tea polyphenols,caffeine content,and phenol ammonia ratio in tea.Redundancy analysis of tea quality components and chlorophyll content with corresponding environmental factors showed that illuminance and minimum temperature were the main indicators that affected the quality components and chlorophyll content of tea.The interaction of a shading height of 1.5 m and a shading rate of 70% is conducive to the production of high-quality matcha.

Key words: Matcha, Shading height, Shading rate, Quality components, Environmental factors

WU Yan, LIANG Wanli, SUN Yongming, ZOU Leping, LIU Fang, ZHU Tong, HUANG Shangshu. Effects of Interaction of Shading Height and Shading Rate on Tea Garden Environment and Matcha Quality[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(S1): 237-244. doi: 10.7668/hbnxb.20194202.

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Figures/Tables 9

References 40

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主处理 Main treatments	副处理 Sub- treatments	表面照度Illuminance
主处理 Main treatments	副处理 Sub- treatments	05-15	05-19	05-23	05-27	06-02
CK		15 875.7±625.3a	42 153.3±1 637.6a	37 783.3±143.6a	57 406.7±433.6a	39 680.0±839.1a
H1	Z1	6 371.7±140.6b	23 163.3±426.7b	18 079.0±381.6c	20 483.0±369.2d	23 703.3±712.9b
	Z2	6 151.3±77.7b	18 719.3±807.1c	16 918.0±236.3d	20 133.3±576.6b	21 121.0±640.8c
	Z3	538.3±25.0g	3 560.0±649.1f	2 011.7±150.4g	2 039.7±217.8i	2 698.0±140.4e
H2	Z1	5 101.7±587.6c	13 826.3±689.7d	20 063.0±418.0b	25 283.3±594.3c	20 078.0±890.1c
	Z2	4 364.0±134.1d	13 443.0±746.6de	18 410.0±205.5c	15 484.0±278.4f	17 929.3±544.0d
	Z3	1 162.7±95.0f	1 620.3±212.3g	3 836.3±650.4f	5 503.3±85.9g	3 629.7±167.8e
H3	Z1	3 699.7±266.0e	12 520.7±430.2de	17 927.0±262.6c	17 908.3±756.1e	18 451.0±660.3d
	Z2	3 463.0±189.3e	12 251.3±454.7e	16 065.0±123.2e	15 703.3±341.6f	18 297.7±270.5d
	Z3	712.7±121.0fg	2 316.3±303.6fg	2 411.0±92.6g	2 915.0±250.8h	3 189.7±467.7e

主处理 Main treatments	副处理 Sub- treatments	表面照度Illuminance
主处理 Main treatments	副处理 Sub- treatments	05-15	05-19	05-23	05-27	06-02
CK		15 875.7±625.3a	42 153.3±1 637.6a	37 783.3±143.6a	57 406.7±433.6a	39 680.0±839.1a
H1	Z1	6 371.7±140.6b	23 163.3±426.7b	18 079.0±381.6c	20 483.0±369.2d	23 703.3±712.9b
	Z2	6 151.3±77.7b	18 719.3±807.1c	16 918.0±236.3d	20 133.3±576.6b	21 121.0±640.8c
	Z3	538.3±25.0g	3 560.0±649.1f	2 011.7±150.4g	2 039.7±217.8i	2 698.0±140.4e
H2	Z1	5 101.7±587.6c	13 826.3±689.7d	20 063.0±418.0b	25 283.3±594.3c	20 078.0±890.1c
	Z2	4 364.0±134.1d	13 443.0±746.6de	18 410.0±205.5c	15 484.0±278.4f	17 929.3±544.0d
	Z3	1 162.7±95.0f	1 620.3±212.3g	3 836.3±650.4f	5 503.3±85.9g	3 629.7±167.8e
H3	Z1	3 699.7±266.0e	12 520.7±430.2de	17 927.0±262.6c	17 908.3±756.1e	18 451.0±660.3d
	Z2	3 463.0±189.3e	12 251.3±454.7e	16 065.0±123.2e	15 703.3±341.6f	18 297.7±270.5d
	Z3	712.7±121.0fg	2 316.3±303.6fg	2 411.0±92.6g	2 915.0±250.8h	3 189.7±467.7e

主处理 Main treatments	副处理 Sub- treatments	SPAD值SPAD value
主处理 Main treatments	副处理 Sub- treatments	05-15	05-19	05-23	05-27	06-02
CK		27.2±0.8e	27.4±1.1de	30.6±0.8de	31.7±1.7d	37.1±2.3c
H1	Z1	35.4±1.2c	36.8±0.7c	35.9±0.5c	37.5±1.2e	37.6±0.8c
	Z2	38.0±2.9b	40.8±0.8c	36.4±1.1c	41.2±2.2d	41.3±2.6b
	Z3	41.3±0.9a	41.5±1.1b	40.3±1.1b	43.4±2.3c	48.0±2.4a
H2	Z1	31.9±0.9d	34.2±1.5e	29.3±1.6e	34.7±1.8d	36.7±2.0c
	Z2	32.6±0.9d	34.2±1.4de	30.9±0.4de	34.8±2.0cd	37.4±2.7c
	Z3	37.9±1.4b	39.7±1.4a	43.8±1.1a	40.9±2.4a	41.0±2.3b
H3	Z1	36.8±0.2bc	38.8±0.7c	36.1±3.3c	30.7±1.6d	31.9±1.3b
	Z2	37.5±1.4bc	38.3±2.0c	35.7±2.0c	39.4±0.9d	41.6±2.0d
	Z3	38.1±2.0b	40.3±0.7cd	33.1±1.2cd	39.4±1.1b	40.9±2.1b

主处理 Main treatments	副处理 Sub- treatments	SPAD值SPAD value
主处理 Main treatments	副处理 Sub- treatments	05-15	05-19	05-23	05-27	06-02
CK		27.2±0.8e	27.4±1.1de	30.6±0.8de	31.7±1.7d	37.1±2.3c
H1	Z1	35.4±1.2c	36.8±0.7c	35.9±0.5c	37.5±1.2e	37.6±0.8c
	Z2	38.0±2.9b	40.8±0.8c	36.4±1.1c	41.2±2.2d	41.3±2.6b
	Z3	41.3±0.9a	41.5±1.1b	40.3±1.1b	43.4±2.3c	48.0±2.4a
H2	Z1	31.9±0.9d	34.2±1.5e	29.3±1.6e	34.7±1.8d	36.7±2.0c
	Z2	32.6±0.9d	34.2±1.4de	30.9±0.4de	34.8±2.0cd	37.4±2.7c
	Z3	37.9±1.4b	39.7±1.4a	43.8±1.1a	40.9±2.4a	41.0±2.3b
H3	Z1	36.8±0.2bc	38.8±0.7c	36.1±3.3c	30.7±1.6d	31.9±1.3b
	Z2	37.5±1.4bc	38.3±2.0c	35.7±2.0c	39.4±0.9d	41.6±2.0d
	Z3	38.1±2.0b	40.3±0.7cd	33.1±1.2cd	39.4±1.1b	40.9±2.1b

主处理 Main treatments	副处理 Sub treatments	水浸出物/% Water extract	氨基酸/% Amino acid	茶多酚/% Tea polyphenol	咖啡碱/% Caffeine	酚氨比 TP/AA ratio
CK		16.07±0.70d	2.34±0.20f	34.57±0.80a	2.25±0.20bc	14.79±1.60a
H1	Z1	24.77±0.70b	2.42±0.20ef	32.03±1.40b	2.43±0.10abc	13.26±0.60b
	Z2	25.20±0.40ab	2.62±0.10d	21.43±0.60f	2.57±0.20ab	8.17±0.50de
	Z3	26.03±0.30a	2.92±0.10ab	13.67±0.90h	2.62±0.10a	4.69±0.30g
H2	Z1	17.57±0.30c	2.57±0.10de	26.30±0.50e	2.27±0.20c	10.25±0.30c
	Z2	17.67±0.30c	2.80±0.10bc	20.73±0.30f	2.45±0.10abc	7.40±0.30ef
	Z3	18.47±0.40c	3.98±0.10ab	20.67±0.30f	2.51±0.10bc	6.94±0.10f
H3	Z1	18.13±0.50c	2.94±0.10ab	24.73±0.60d	2.34±0.10bc	8.42±0.30de
	Z2	18.20±0.30c	2.67±0.20cd	23.33±0.50e	2.47±0.10abc	8.75±0.40de
	Z3	18.47±1.50c	2.50±0.050def	19.40±0.80g	2.51±0.10ab	7.76±0.10def

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