0011夏肥的施用时期及其氮素形态对茶树氮素吸收代谢的影响保科次雄用重氮标志的(~(15)NH_4)_2SO_4和Ca(~(15)NO_3)_2,以水培法研讨了二茶的氮素形态和施肥时期的影响。在短期中没有看到由于两种氮素形态的不同对生育上产生的影响,但施肥氮素的吸收量,氨态氮约为硝态氮的2.5倍,两种氮素形态至开叶期被吸收的占全吸收量的70—76％。施肥氮素进入二茶茶芽的比率,以氨态氮为高,在开叶前(前期) 0011 Effects of Summer Fertilization and Nitrogen Forms on Nitrogen Absorption and Metabolism of Tea Plants BAO Ke-xiong (College of Resources and Environmental Sciences, Southwest Jiaotong University, Xi’an 710058, China) Using the nitrogen (~ (15) NH_4) _2SO_4 and Ca (~ (15) NO_3) The effects of different nitrogen forms and fertilization periods on the two tea varieties were discussed. In the short term, we did not see the effect on the fertility due to the difference of the two nitrogen forms, but the nitrogen uptake was about 2.5 times that of the ammonia nitrogen, Absorbed 70-76% of total absorption. Fertilizer nitrogen into the ratio of two tea buds to ammonia nitrogen is high, before opening (early)