Comparison of Ecological Stoichiometric Characteristics in Fresh Tea Leaves among Tea-Growing Regions of Wuyi Mountain

doi:10.11924/j.issn.1000-6850.casb2025-0003

Abstract

Abstract:

To distinguish the characteristics of fresh leaves of tea plants from the Zhengyan, Banyan and Zhoucha tea regions in Wuyi Mountain from an ecological stoichiometry perspective, the study was conducted at Wuyi Mountain National Park in July 12-31, 2021. We compared the carbon (C), nitrogen (N) and phosphorus (P) contents, stoichiometric ratios and the natural abundance of carbon isotopes (δ13C) of tea (Cinnamomum cassia) plants leaves. The results showed that prior to autumn fertilization, the N content of fresh tea leaves in the Zhengyan area (24.81 g/kg) was significantly higher than those in the Banyan (22.26 g/kg) and Zhoucha (22.31 g/kg) areas. The δ13C value of Zhengyan fresh tea leaves (-29.79‰) was markedly lower than those of Banyan (-29.09‰) and Zhoucha (-28.50‰) regions. Additionally, The N:P ratio in Zhengyan fresh tea leaves (16.04) significantly exceeded those of the Banyan (14.14) and Zhoucha (14.21) areas. So, we could draw conclusions as followed. (1) The N content, N:P ratio and δ13C values could effectively differentiate fresh tea leaves in the Zhengyan region from those of the other two regions. (2) Zhengyan tea plants exhibited slower growth rates, lower water use efficiency, and the growth was limited by phosphorus, whereas tea plants in the Banyan and Zhoucha regions demonstrated faster growth, higher water use efficiency, and the growth was co-limited by both N and P. These physiological and stoichiometric disparities might contribute to variations in tea quality among the three regions.

Key words: Wuyi Mountain, tea leaves, ecological stoichiometry, carbon (C), nitrogen (N), phosphorus (P)

WANG Jizhou, WANG Dongkun, XIE Wei, YIN Chuanhua, SHI Qiumei, LI Yanyan. Comparison of Ecological Stoichiometric Characteristics in Fresh Tea Leaves among Tea-Growing Regions of Wuyi Mountain[J]. Chinese Agricultural Science Bulletin, 2025, 41(20): 74-79.

Figures/Tables 6

References 47

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茶区分类	采样地点	海拔/m	经纬度
正岩	北斗峰、水帘洞口、青石岩(2)、水帘洞、牛栏坑、天心禅寺旁、倒水坑、鹰嘴岩、慧苑寺、流香涧、好汉坡、章堂涧、马头岩(2)、悟源涧	233.80~359.94	117°57'05"—117°58'26"E 27°39'97"—27°41'16"N
半岩	前兰(2)、乌龟山、梅子桥、樟树村、小武夷、武夷学院后山、燕子窠、一线天、白云寺、黄柏村太庙、官庄	209.54~283.99	117°55'47"—118°0'02"E 27°44'32"—27°36'45"N
洲茶	牛坪、观音岩、兴田镇(3)、五夫镇(2)、上梅码头(2)、洋庄乡浆溪村吴三地(2)、洋庄乡浆溪村长滩、黄柏村官埠头(2)、黄柏村江敦、下梅村清香涧茶厂附近	182.70~674.35	117°0'21"—118°13'0"E 27°29'91"—27°45'38"N

茶区分类	采样地点	海拔/m	经纬度
正岩	北斗峰、水帘洞口、青石岩(2)、水帘洞、牛栏坑、天心禅寺旁、倒水坑、鹰嘴岩、慧苑寺、流香涧、好汉坡、章堂涧、马头岩(2)、悟源涧	233.80~359.94	117°57'05"—117°58'26"E 27°39'97"—27°41'16"N
半岩	前兰(2)、乌龟山、梅子桥、樟树村、小武夷、武夷学院后山、燕子窠、一线天、白云寺、黄柏村太庙、官庄	209.54~283.99	117°55'47"—118°0'02"E 27°44'32"—27°36'45"N
洲茶	牛坪、观音岩、兴田镇(3)、五夫镇(2)、上梅码头(2)、洋庄乡浆溪村吴三地(2)、洋庄乡浆溪村长滩、黄柏村官埠头(2)、黄柏村江敦、下梅村清香涧茶厂附近	182.70~674.35	117°0'21"—118°13'0"E 27°29'91"—27°45'38"N

位置	SOC/(g/kg)	CV/%	N/(g/kg)	CV/%	P/(g/kg)	CV/%
正岩	14.40±4.37a	26.41	1.56±0.08a	21.75	3.29±0.19a	19.85
半岩	17.03±1.18a	38.5	1.55±0.15a	33.71	3.02±0.15b	17.2
洲茶	16.65±1.70a	30.75	1.17±0.14a	37.11	3.03±0.20ab	24.12

位置	SOC/(g/kg)	CV/%	N/(g/kg)	CV/%	P/(g/kg)	CV/%
正岩	14.40±4.37a	26.41	1.56±0.08a	21.75	3.29±0.19a	19.85
半岩	17.03±1.18a	38.5	1.55±0.15a	33.71	3.02±0.15b	17.2
洲茶	16.65±1.70a	30.75	1.17±0.14a	37.11	3.03±0.20ab	24.12

茶区	C/(g/kg)	δ¹³C/‰	N/(g/kg)	P/(g/kg)
正岩	48.12±0.40a	-29.79±0.87b	24.90±0.52a	1.56±0.04a
半岩	47.26±0.40a	-29.09±1.14ab	22.53±0.56b	1.60±0.03a
洲茶	47.08±0.33a	-28.50±1.03a	22.77±0.90b	1.62±0.06a