气候变化对茶园土壤质量和茶树营养元素含量的影响

Effects of Climate Change on Soil Quality and Plant Nutrition in Tea Gardens

随着大气温度和CO_2浓度不断升高,以及伴随而来的高温干旱和暴雨等极端天气不断增加,对茶园土壤的影响也会不断加剧。气候变化会导致茶园土壤有机质、有效养分含量降低,并改变茶树体内营养元素的平衡,特别是碳含量增高,而氮、钾、镁、硫、铁和锌等矿质营养元素含量降低,从而降低茶叶产量和品质。为此,采取减耕和免耕、修剪枝叶回园,增施有机肥,适当增施氮肥等矿质养分,以及加强茶园排灌系统建设等措施有利于应对气候挑战,促进茶叶生产持续健康发展。

With the increase of temperature and CO2 concentration,and more extreme weather events,such as high temperature,long spell of drought,and rainstorm,which have been adversely affecting soil quality and plant nutrition.The available data show that climate change reduces soil organic matter and available plant nutrient contents,changes the balance of plant nutrients,which would increase C,but decrease N,P,K,Mg,S,Fe and Zn contents,finally reduce tea production and quality.Reducing and/or no tillage,returning prunings back to soils,more organic fertilizer,appropriate chemical fertilizers,strengthening the construction of drainage and irrigation systems should be taken into consideration to cope with climate change for the sustainable tea production.