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《Journal of Food Science and Technology》 2017-06
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Effects of Different Intercropping Patterns on Tea-Planted Soil and Tea Nutritional Quality

LIU Tengfei;DONG Minghui;ZHANG Li;GU Junrong;ZHANG Guoqin;QIAN Hui;Agro-product Quality Safety and Testing Technology Research Division,Jiangsu Taihu Area Institute of Agricultural Sciences;College of Education and Humanity,Suzhou Vocational University;  
To explore the effects of different intercropping patterns on tea-planted soils and tea nutritional qualities,both the main chemical characters of soils and nutritional components in fresh tea leaves were detected,which were sampled from the fruit-tea intercropping and pure tea gardens in the east Dongting( ED) and west Dongting( WD) mountain. The results showed that the fruit-tea intercrop effectively relieved soil acidification and improved the nutritive and mineral contents of the topsoil( 0-25 cm). The principal component analysis showed that the nutrient composition,mineral contents,and acid alkali of soil were the main factors that influenced the properties of tea-planted soil. It was found that the best soil nutrient status appeared in the loquat-tea intercropping plantation in WD,decreasingly followed by the pure tea plantation in WD,waxberry-tea intercrop in ED,the pure tea plantation in ED,and the loquattea intercrop in ED. Effects of fruit-tea intercropping patterns and tea-producing districts on nutritional qualities of fresh-leaves were different. In ED,the contents of free amino acids and tea polyphenols in fruit-tea intercropping plantations were slightly higher than those of pure tea plantation,while contents of catechin and caffeine were lower than those of pure tea plantation. In WD,the contents of tea polyphenol,catechin,and caffeine in fresh tea leaves from the waxberry-fruit intercropping plantation were lower than those of pure tea plantation. Moreover,the results indicated that the free amino acid content was negatively related to the contents of Fe and Zn in soil,and tea polyphenol was positively related to the alkaine nitrogen,organic matter,and Zn. Meanwhile,caffeine was positively related to electric conductivity,total nitrogen,effective phosphorus,alkaline nitrogen,Ca and Fe,but it was negatively related to the total potassium. Above all,it was clear that fruit-tea intercrop played significant roles in soil environment,and the study provided important evidences for quality improvement and production management of the Dongting Biluochun tea.
【Fund】: 江苏省农业科技自主创新基金项目(CX(14)2102)
【CateGory Index】: S344.2;S571.1
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