抑制剂NAM对盐渍土壤玉米产量和氮肥农学利用效率的影响  

Effects of Inhibitor NAM on Corn Yield and Agronomic Utilization Efficiency of Nitrogen Fertilizer in Saline-Alkali Soil

作　　者：国艳春 孙显旻 曾路生[1] 李旭霖[1] 宋祥云[1] 柳新伟[1] 崔德杰[1] Guo Yanchun;Sun Xianmin;Zeng Lusheng;Li Xulin;Song Xiangyun;Liu Xinwei;Cui Dejie(College of Resources and Environment,Qingdao Agricultural University,Shandong Qingdao 266109)

机构地区：[1]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《中国农学通报》2021年第5期43-48,共6页Chinese Agricultural Science Bulletin

基　　金：山东省重点研发计划“盐渍土快速改良与地力培肥产品的研发与应用”(2017CXGC0303)。

摘　　要：为了提高盐碱土壤中氮肥的利用率,降低硝化作用,减少氮素营养的流失,采用田间小区试验,试验处理设置为:不施肥为对照、常规施肥、常规施肥+NAM(长效复合肥添加剂)、常规施肥80%+NAM,研究了不同处理盐渍土壤养分离子及玉米产量的变化。结果表明,与常规施肥比较,常规施肥+NAM处理可提高土壤碱解氮、速效磷、速效钾和有机质等含量,降低土壤碱化度。增加了土壤CEC(Cation exchange capacty,阳离子交换量)及水溶性盐基离子K^(+)、Ca^(2+)与Mg^(2+)含量。pH变化不明显,电导率有一定下降。玉米产量提高了10.30%,氮肥农学利用效率提高了34.38%。常规施肥80%+NAM处理玉米产量与常规施肥相当,但具有更高的肥料偏生产力和氮肥农学利用效率,可推荐在生产实践中参考应用。To improve the utilization rate of nitrogen fertilizer in saline-alkali soil,reduce nitrification and reduce the loss of nitrogen nutrition,a field plot test was conducted.The test was set as:no fertilization as control,conventional fertilization,conventional fertilization+NAM(long-acting compound fertilizer additive),conventional fertilization 80%+NAM.The changes of saline soil nutrients and corn yield in different treatments were studied.The results indicated that compared with conventional fertilization,conventional fertilization+NAM treatment increased soil nutrient content such as alkaline nitrogen,available phosphorus,available potassium and organic matter,and reduced soil alkalinity;increased soil CEC(cation exchange capacity)and water-soluble base ions K^(+),Ca^(2+)and Mg^(2+).The soil pH did not change significantly,and the conductivity decreased to some extent.The yield of corn increased by 10.30%,and the agronomic utilization efficiency of nitrogen fertilizer increased by 34.38%.The corn yield of conventional fertilization 80%+NAM treatment is equivalent to that of conventional fertilization,however,it has higher partial fertilizer productivity and agronomic utilization efficiency of nitrogen fertilizer,and could be recommended for application in production.

关 键 词：抑制剂NAM 盐碱土壤 玉米 氮肥农学利用效率 

分 类 号：S513[农业科学—作物学]