作　　者： ; ; ;

机构地区： 青岛农业大学农学与植物保护学院茶叶研究所

出　　处： 《应用生态学报》 2011年第9期2291-2296,共6页

摘　　要： 以山东青岛2年生茶园为对象,设置对照(CK)、覆盖秸秆(T1)、覆盖地膜(T2)和覆盖秸秆+地膜(T3)4个处理,分析了不同覆盖模式对茶园土壤水分和养分以及茶树生长的影响.结果表明:地表覆盖可以保持茶园土壤水分,提高水分利用效率,其中T1、T3处理的茶树生长水分利用效率比CK提高43%～48%,产量水分利用效率提高7%～13%;T1和T3处理土壤有机质、碱解氮、硝态氮、铵态氮的含量显著增加,提高了土壤肥力;叶片硝酸还原酶活性增强,叶片中硝态氮的含量增加,有效地促进茶树生长,茶叶产量比CK增加12%～13%,使茶树新梢生长高峰提前.从茶树生长、茶叶产量、水分和养分利用率、环境安全和经济效益等因素考虑,覆盖秸秆是幼龄茶园地表覆盖的有效方式. Taking a 2-year old tea garden in Qingdao of Shandong Province as test object, this paper studied the effects of different mulching modes on the soil water and nutrient dynamics and tea plant growth. Four treatments were installed, i.e., no mulching （CK）, straw mulching （T1）, plastic film mulching （T2）, and straw plus plastic film mulching （T3）. Comparing with CK, mulching could keep the soil water content at a higher level, and enhance the water use efficiency. In treatments T1 and T3, the tea growth water use efficiency and yield water use efficiency increased by 43%-48% and 7%-13%, respectively, compared with CK. Also in treatments T1 and T3, the contents of soil organic matter, available-N, nitrate-N, and ammonium-N increased significantly, with the soil fertility improved, and the leaf nitrate-N content and nitrate reductase activity increased, which promoted the tea growth and yield （12%-13% higher than CK） and made the peak period of bud growth appeared earlier. Considering the tea growth and yield, water and nutrient use efficiency, environment safety and economic benefit, straw mulching could be an effective ground surface mulching mode for young tea garden.

关 键 词： 茶树 水分利用效率 硝态氮 铵态氮 硝酸还原酶

领　　域： [农业科学] [农业科学] [农业科学] [农业科学]