关键词: 冬枣, 袋控缓释肥, 氮素利用率, 产量, 品质

Abstract: Bag controlled release fertilizer was a new type fertilizer which changed the idea of spraying high molecular materials to fertilizer particles according to the big individual volume characteristics of fruit trees. Experiments about effect of fertilizer being bag2controlled release on nitrogen utilization rate, growth and
fruiting were done using Zhanhua Winter Date ( Zizyphus jujuba Mill. var. inerm is Rehd. ) as materials, the results showed that: Soil available nutrients concentration of fertilizer being bag controlled release application treatments (BCRT) wasmore steadier than that of fertilizer being spread application treatments (ST) ;Nutilization rate forBCRT treeswas 2.8 and 1.5 times as high as that for fertilizer being sp read app lication in one time treatments and in four times treatments trees respectively; Trees of BCRT were healthier but generated less jujube shoot than trees of ST due to steady nutrients concentration in soil; At the same application amount level chlorophyll content and Pn of BCRT treeswere steadier and higher than those of ST; BCRT significantly increased yield and fruit quality.

Key words: Zizyphus jujuba Mill. var. inermis Rehd., Bag-controlled release fertilizer, N utilization rate, Yield, Quality