茶园不同修剪期小气候对保靖黄金茶的影响

Effects of microclimate in different pruning periods on Baojing golden tea

为了探究不同修剪期小气候对保靖黄金茶产量、品质和物候影响的变化规律,利用2016—2019年保靖县黄金村不同海拔高度立体小气候资料,用聚类和GIS地理分析法对茶叶产量和生化检测报告资料进行分析。结果表明,每年2次修剪期茶园温度和日照时数相近,降水量差异明显,达55.5 mm;每年2次修剪的茶叶外观质量和生化品质优于每年1次修剪茶叶;就对茶叶生化成分含量的影响而言,与夏季1次修剪相比,每年夏秋2次修剪氨基酸平均降低0.1个百分点,茶多酚平均增加1.8个百分点,蛋白质平均减少3.15个百分点,咖啡因平均增加2700 mg/kg;220 m与470 m高海拔相比,220 m低海拔秋茶1 m2发芽头多11个,千芽重要重27 g。茶园每年2次修剪比1次修剪优越,春茶产量高,提高了茶叶特优品质出产率。

To explore the variation law of yield,quality and phenology of Baojing Golden tea in different pruning influence periods,based on the three-dimensional microclimate data from 2016 to 2019 in Baojing county Golden village,the tea yield and biochemical detection data were analyzed by cluster analysis and GIS geographic analysis.The results showed that the microclimate temperature and sunshine hours of tea plantation during two seasons pruning were similar,and the precipitation difference was 55.5 mm.The appearance quality and biochemical quality of the tea cut twice a year were better than that of the tea once a year.Compared with the effect of two times pruning and one time pruning on biochemical composition,the amino acid content decreased by 0.1 percentage point on average,the tea polyphenols increased by 1.8 percentage point on average,and the protein content increased by 3.15 percentage point on average.The caffeine increased by 2700 mg/kg on arerage.The germination rate and 1000-bud weight of 220-meter low-altitude autumn tea were 11 buds in 1 m2 and 27 grams more than those of 470-meter high-altitude tea.Tea garden every year two times pruning was superior to one times pruning,and spring tea yield was high,which improved tea special excellent quality production rate.