摘要
旨在明确腐殖酸添加量对尿素肥效的影响,为腐殖酸尿素在华北石灰性土壤冬小麦增产中的作用提供支持资料。田间条件下,通过施用不同用量腐殖酸添加剂尿素(I-VI型,腐殖酸添加量1%~6%),与普通尿素处理作对比,比较其对改善氮素吸收和冬小麦产量持续提高的影响。试验结果表明:腐殖酸尿素添加量与冬小麦产量和氮吸收密切相关。施氮量相同时,IV型腐殖酸尿素能够显著增加冬小麦产量并促进氮素向籽粒中运移,腐殖酸尿素显著提高穗粒数(I和II型腐殖酸尿素)和千粒重(II、V和VI型腐殖酸尿素)等产量构成因素;III型腐殖酸尿素显著提高冬小麦氮吸收率,但均对锰吸收、土壤有机质含量、出苗数、分蘖数、有效蘖数和穗数等无显著促进作用。由此可见,腐殖酸尿素肥效与腐殖酸添加剂量密切相关,4%腐殖酸作为尿素添加剂时能显著增加高产冬小麦产量和构成因素,3%腐殖酸作为尿素中添加剂时显著提高氮吸收率。
The objectives are to verify the effect of humic acid addition on urea fertilizer efficiency,and to provide evidences to increase yield of winter wheat by humic acid-urea in limy soils in the North China Plain.Compared with common urea application,the effect of different humic acid-urea(type I-VI,with 1%-6%humic acid concentration)on nitrogen uptake and yield increase of winter wheat was studied in field.The results showed that humic acid-urea addition amounts were closely correlated with winter wheat yield and nitrogen uptake.With the same nitrogen application amount,IV type humic acid-urea significantly increased yield of winter wheat and promoted nitrogen transferring to wheat grain.Meanwhile,humic acid-urea improved yield component,including number of grains per ear(type I and II humic acid-urea)and 1000-grain weight(type II,V and VI humic acid-urea).Type III humic acid-urea significantly enhanced nitrogen uptake efficiency,but there was not significant promotion for manganese uptake,soil organic matter content,emergence number,tiller number,head-producing tiller number and ear number.Therefore,fertilizer effect of humic acid-urea was closely correlated with humic acid application amounts.4%humic acid application in urea could significantly improve yield and the components of winter wheat yield,and 3%humic acid application could significantly enhance nitrogen uptake efficiency.
作者
刘盛林
董晓霞
孙泽强
崔双双
Liu Shenglin;Dong Xiaoxia;Sun Zeqiang;Cui Shuangshuang(Scientific Observing and Experimental Station of Arable Land Conservation(Shandong),Ministry of Agriculture,Institute of Agricultural Resources and Environment,Shandong Academy of Agricultural Sciences,Jinan 250100)
出处
《中国农学通报》
2020年第14期16-21,共6页
Chinese Agricultural Science Bulletin
基金
公益性行业(农业)科研专项“旱地两熟区耕地培肥与合理农作制”课题(201503121-06)
山东省自然基金“黄河三角洲盐渍化农田磷库活化提高磷生物有效性途径研究”课题(ZR2017YL012)
山东省重点研发计划“滨海盐碱地生态保育与地力提升关键技术研究与示范”课题(2017CXGC0311)。
关键词
腐殖酸尿素
冬小麦
产量
氮吸收效率
humic acid-urea
winter wheat
yield
nitrogen uptake efficiency
