Effects of multi-film covering in plastic greenhouses on the microclimate tea yield and quality of tea garden

doi:10.3969/j.issn.1000-2006.2014.03.012

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (03): 59-64.doi: 10.3969/j.issn.1000-2006.2014.03.012

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Effects of multi-film covering in plastic greenhouses on the microclimate tea yield and quality of tea garden

LIN Yongfeng¹, HU Yongguang¹, LI Pingping^1,2*

1. Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China;
2. College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China

Online:2014-05-15 Published:2014-05-15

Abstract

Abstract: This article aimed to determine the effect of different levels of coverage on microclimate, growth and quality of tea. The temperature, humidity, illumination of tea garden and photosynthetic characteristics, ingredients and yield of tea were measured. Four different treatments, i.e., outdoor cultivation(CK), double-film covering, triple-film covering and triple-film covering with electricity heating were included. The results showed that different level cover obviously enhanced the average temperature, ground temperature and relative humidity within the tea garden. Furthermore, the net photosynthetic rate of treatments in the sunny day was 2.46-2.84 times than that of CK. However, the intensity of illumination in the greenhouse decreased. In addition, the new shoots, hundred buds weight and budding density of tea also increased significantly. Therefore, the picking time of one-bud and one-leaf of treatments was 10-21 d earlier than that of CK, and the tea fresh leaf yield of three treatments increased by 80%, 96%, 176%, respectively. Biochemical analysis indicated that contents of tea polyphenol, amino acid, caffeine and water extracts of each treatment were significantly different. The tea phenol ammonia ratio of double-film covering reached fine-grade green-tea standards.

CLC Number:

S723.1⁺35

LIN Yongfeng, HU Yongguang, LI Pingping. Effects of multi-film covering in plastic greenhouses on the microclimate tea yield and quality of tea garden[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(03): 59-64.

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Effects of multi-film covering in plastic greenhouses on the microclimate tea yield and quality of tea garden

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