控释肥与尿素配施对茶园土壤碱解氮含量和茶叶品质的影响  

Effect of Mixtures of Release-controlled Fertilizer and Urea on Soil Nitrogen Content in Tea Garden and Quality of Tea Leaves

作　　者：付乃峰[1] 洪永聪[1] 丁兆堂[1] 

机构地区：[1]青岛农业大学茶叶研究所,山东青岛266109

出　　处：《西北农业学报》2010年第4期106-109,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：山东省科技攻关计划项目资助(2006GG2209008)

摘　　要：采用大田试验,研究不同控释肥与尿素配施处理对茶园土壤碱解氮含量和茶叶品质的影响。结果表明,控释肥与尿素配施能显著增加0~20 cm和20~40 cm土层土壤碱解氮的含量,能有效提供茶树生长所需的大量碱解氮;在肥料施入后的6个阶段内,不同土层土壤碱解氮含量随时间变化均呈下降趋势,且出现迅速下降与缓慢降低两个阶段,84天后,土壤中碱解氮含量降至最低值。控释肥与尿素配施显著增加茶叶中氨基酸含量和咖啡碱含量,降低茶多酚含量和酚氨比,能有效提高绿茶品质,3种不同施肥处理中,以30%控释肥与70%尿素处理的效果最好。Different treatments of release-controlled fertilizer and urea were conducted in tea garden,and soil alkali-hydro nitrogen content and quality components in leaves were measured.The results indicated that the alkali-hydro nitrogen content in 0~20 cm and 20~40 cm soil increased significantly under the treatments of mixtures of releas-fertilizer controlled and urea fertilizer,and a mass of alkali-hydro nitrogen could be used effectively for tea plant growth;during the six periods after the fertilizers were delivered into field,alkali-hydro nitrogen content decreased,with a rapid downtrend from the 6th to 38th d,and slowly after the 38th d,and the content of alkali-hydro nitrogen reached minimum value near the 84th d.Mixtures of release-controlled fertilizer and urea fertilizer could increase amino acid content and caffeine content in tea leaves obviously,while reduce tea polyphenols content and the ratio of polyphenols to amino acid significantly.Finally,the quality of green tea could be improved.Among the three treatments,the mixture of 30% release-controlled fertilizer and 70% urea showed the best effect.

关 键 词：茶园 控释肥 尿素 碱解氮 茶叶品质 

分 类 号：S571.1[农业科学—茶叶生产加工]