等养分条件下缓/控释肥料替代部分速效化肥对中稻生产效益的影响

Effects of Slow Controlled-release Fertilizer Replace Part of Chemical Fertilizer on Middle Rice under the Same N, P and K Input

以杂交稻Y两优1号为试验材料,通过红壤性稻田和潮沙泥田的田间试验,在施用等量氮、磷、钾养分条件下,比较了不施肥(CK)、常规施肥(CF)、一次性基施100%缓/控释肥料(100%CRF)和一次性基施80%缓/控释肥料(80%CRF)对中稻产量、氮素利用效率和经济效益的影响。结果表明,100%CRF、80%CRF处理水稻产量均高于CF处理,增幅为5.17%~6.48%,但处理间差异不显著;与CF处理相比,100%CRF、80%CRF处理显著提高了水稻的氮素吸收利用率和农学利用率,增幅平均分别为16.2%~24.6%和18.0%~20.2%(P<0.05);而氮肥的生理利用率和偏生产力各施肥处理间差异不显著;100%CRF、80%CRF处理均显著提高了水稻的净收益,与CF处理相比增幅为5.87%~6.19%(P<0.05)。

Hybrid rice Y liangyou 1 was used as experimental material, four treatments including no fertilizer （CK）, conventional fer- tilization （CF）, slow/controlled release fertilizer all used as basal fertilizer （100% CRF）and 80% slow/controlled release fertilizer used as basal fertilizer （80% CRF）with equal application of nitrogen, phosphorus and potassium were designed to study the effects of different treatments on yield, nitrogen use efficiency and economic benefits of rice in red soil paddy field and sand and mud field. The results showed that rice yield of the 100% CRF and 80% CRF treatments were higher than CF treatment, increased by 5.17% - 6.48%, but there was no significant difference between the treatments. Compared with CF treatment, the nitrogen recovery efficiency and nitrogen agronomic efficiency of 100% CRF and 80% CRF treatments were significantly increased by 16.2%-24.6% and 8.0%- 20.2% （P〈0.05）, respectively; the nitrogen physiological utilization efficiency and partial factor productivity had no significant difference between different fertilizer treatments, the net income of 100% CRF and 80% CRF treatments were increased by 5.87%~5.87% （P 〈 0.05）.