Supported by the Natural Science Foundation of Fujian Province in China (No. 2017J01602) and the Modern Agricultural Talents Support Project of Ministry of Agriculture and Rural Affairs of China
[Objective] Wuyi rock tea is a kind of traditional brand high-quality oolong tea. However, its quality varies from region to region significantly. This regional difference is mainly attributed to two major factors. One is soil parent material that affects soil nutrient supply, and the other is climate that determines temperature, light intensity, humidity, etc. To date, the focus of this study is to find out the determinants of quality formation of Wuyi rock tea. The purpose of this study was to explore difference in mineral nutrition of Wuyi rock teas from different planting areas, so as to better understand contributions of the nutrients to the quality of Wuyi rock tea.[Method] In this study, tea leaf samples and soil samples were collected from 112 tea gardens in the Wuyi Mountain. The tea gardens were distributed in three planting areas, i.e. Zhengyan, Banyan and Zhou, producing teas, high, medium and low in quality, respectively. The tea leaf samples were analyzed for contents of 12 mineral elements(N, P, K, Ca, Mg, Fe, Mn, Cu, Zn, B, Mo, Ni)and the soil samples were for 5 soil fertility parameters(pH, Alkaline nitrogen, Available phosphorus, Available potassium and Organic matter).[Result] Principal component analysis shows that the tea leaf samples varied evidently in content of mineral elements with the planting area. Random forest analysis shows that among all the mineral nutrients in the tea leaf samples tested, phosphorus, copper and nitrogen differed the most significantly from region to region. Furthermore, in terms of concentrations of the three elements the teas followed a decreasing order of Zhou tea > Banyan tea > Zhengyan tea, while in terms of tea quality, they followed an increasing order of Zhou tea < Banyan tea < Zhengyan tea, which indicates the lower the concentrations of phosphorus, copper and nitrogen, the higher the tea quality. Pearson correlation analysis shows that the 5 soil fertility parameters did not have much correlations with the three nutrient elements in the tea leaves, suggesting that contents of the nutrients in Wuyi rock tea are affected by comprehensive environmental factors, rather than solely determined by soil nutrient status.[Conclusion] To sum up, this study demonstrates that content of phosphorus, copper and nitrogen in tea leaves is somewhat negatively related to quality of Wuyi rock tea, which serve as reference for soil nutrient management of tea gardens.
薛俊鹏,卓座品,刘扬,周志,黄泓晶,许锐能,郭子龙,孙丽莉,陈志长,廖红.武夷岩茶中矿质养分的地域性差异及影响因素[J].土壤学报,2022,59(2):528-535. DOI:10.11766/trxb202008170341 XUE Junpeng, ZHUO Zuopin, LIU Yang, ZHOU Zhi, HUANG Hongjing, XU Ruineng, GUO Zilong, SUN Lili, CHEN Zhichang, LIAO Hong. Variation of Wuyi Rock Tea in Mineral Nutrition with Region and Its Affecting Factors[J]. Acta Pedologica Sinica,2022,59(2):528-535.复制
Imeungwa mkono na Shirika la Sayansi ya Asili la Mkoa wa Fujian nchini China (No. "Wuyi Rock Tea ni aina ya chai ya jadi ya ubora wa juu ya ""Oolong"" ya bidhaa." Hata hivyo, ubora wake hutofautiana sana kutoka eneo moja hadi lingine. Tofauti hiyo ya kikanda husababishwa hasa na mambo mawili makuu. Moja ni udongo mzazi nyenzo ambayo huathiri udongo virutubisho ugavi, na nyingine ni hali ya hewa ambayo huamua joto, mwanga nguvu, unyevu, na kadhalika. Hadi sasa, lengo la utafiti huu ni kupata determinants ya ubora wa malezi ya Wuyi mwamba chai. Utafiti huu ulilenga kuchunguza tofauti katika lishe ya madini ya chai ya mwamba wa Wuyi kutoka maeneo tofauti ya kupanda, ili kuelewa vizuri michango ya virutubisho kwa ubora wa chai ya mwamba wa Wuyi. Katika utafiti huu, sampuli za majani ya chai na sampuli za udongo zilikusanywa kutoka bustani 112 za chai katika Mlima Wuyi. Bustani za chai ziligawanywa katika maeneo matatu ya kupanda, yaani. Zhengyan, Banyan na Zhou, kuzalisha chai, ya ubora wa juu, wa kati na wa chini, kwa mtiririko huo. Kwa mfano, sampuli za majani ya chai zilipimwa kwa ajili ya maudhui ya madini 12 (N, P, K, Ca, Mg, Fe, Mn, Cu, Zn, B, Mo, Ni) na sampuli za udongo zilipimwa kwa ajili ya vipimo vitano vya uzazi wa udongo (pH, Alkaline Nitrogen, Phosphorus, Potassium na Organic). [Matokeo] Uchambuzi wa sehemu kuu inaonyesha kwamba sampuli ya majani ya chai tofauti dhahiri katika maudhui ya madini ya madini na eneo la kupanda. Uchunguzi wa msitu unaonyesha kwamba kati ya virutubisho vyote vya madini katika sampuli za majani ya chai zilizochunguzwa, phosphorus, shaba na nitrojeni zilitofautiana sana kutoka mkoa hadi mkoa. Kwa kuongezea, kwa suala la viwango vya vitu vitatu, chai zilifuata utaratibu wa kupungua wa chai ya Zhou, chai ya Banyan, na chai ya Zhengyan, wakati kwa suala la ubora wa chai, zilifuata utaratibu wa kuongezeka wa chai ya Zhou, chai ya Banyan, na chai ya Zhengyan, ambayo inaonyesha kuwa kiwango cha chini cha fosforasi, shaba na nitrojeni, ni bora zaidi. Uchambuzi wa Pearson unaonyesha kwamba vigezo vitano vya uzazi wa udongo havikuwa na uhusiano mkubwa na vitu vitatu vya virutubisho katika majani ya chai, ikidokeza kwamba maudhui ya virutubisho katika chai ya mwamba wa Wuyi huathiriwa na sababu za mazingira kamili, badala ya kuamuliwa tu na hali ya virutubisho vya udongo. Kwa muhtasari, utafiti huu unaonyesha kuwa yaliyomo ya fosforasi, shaba na nitrojeni katika majani ya chai yana uhusiano hasi na ubora wa chai ya mwamba wa Wuyi, ambayo hutumika kama kumbukumbu ya usimamizi wa virutubisho vya udongo wa bustani za chai. Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano: Mfano "Hii ni pamoja na: ""Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang, Zhu Yuanzhang." Tofauti ya Wuyi Rock Tea katika Chakula cha Madini na Mkoa na Sababu Zake za Kuathiri [J]. Acta Pedologica Sinica, 2022-59 (528-535), na