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大田条件下以不施氮肥(CK 1)、尿素基施(CK 2)和尿素基追比1∶1(CK 3)3个处理做对照,对施用3种包膜缓释肥(SRF 1、SRF 2和SRF 3)冬小麦产量、不同时期植株含氮量及肥料利用率进行比较。结果表明:与CK 2相比,3种包膜缓释肥料产量提高3.4%~20.2%,肥料利用率提高7.65%~15.45%,除苗期外其他时期冬小麦的植株含氮量也有所提高,但均比CK 3稍低;3种缓释相比较,SRF I和SRF 2各种指标均优于SRF 3。说明缓释肥一次性施用基本可以满足小麦整个生长期的需要。
Under field conditions, the three treatments of CK 1, CK 2 and CK 3 were compared. Three kinds of coated slow release fertilizers (SRF 1, SRF 2 and SRF 3) were compared in terms of winter wheat yield, plant nitrogen content and fertilizer use efficiency in different periods. The results showed that compared with CK 2, the yield of three kinds of coated slow-release fertilizers increased by 3.4% ~ 20.2% and the utilization rate of fertilizers increased by 7.65% ~ 15.45%. The nitrogen content of winter wheat at other times except seedling stage also increased, But both were slightly lower than that of CK 3. Compared with SRC, the indexes of SRF I and SRF 2 were better than those of SRF 3. Explain that the one-time application of slow-release fertilizer can basically meet the needs of wheat throughout the growing season.