摘要
采用田间小区试验方法,研究了树脂包膜尿素(CRU)和保水剂(SAP)配施对冬小麦产量、氮素利用及经济效益的影响。试验采用裂区设计,两裂区分别为施用SAP(120 kg hm-2)和不施用SAP,施肥裂区设对照(N0,不施氮)、普通尿素(U,施氮180kg hm-2)和包膜尿素(CRU,施氮180 kg hm-2,包膜尿素和普通尿素各占70%和30%)3个氮肥处理;共6个处理。结果表明:相同SAP用量下,等氮量的CRU一次基施较尿素分次追施处理平均增产4.9%,氮素利用率提高9.4%。施用SAP显著提高了土壤最大持水量。相同施氮条件下,施用SAP处理较不施SAP处理冬小麦穗数和穗粒数显著增加,籽粒增产9.6%~12.1%。CRU与SAP配合施用优于SAP或CRU单独施用。CRU配施120 kg hm-2SAP处理冬小麦产量和氮素利用效率最高,较CRU或SAP单施处理处理增产4.9%~53.3%;氮素利用效率提高8.6%~35.6%。因此,保水剂和包膜尿素配施可协同增效,显著提高冬小麦产量及氮素利用效率。
The combined effects of super-absorbent polymers(SAP)and controlled-release urea(CRU)on the yields and water use efficiency(WUE)as well as nitrogen use efficiency(NUE)of winterwheat were studied in a field experiment.The results showed that:(1)The yield and NUE in the CRU treatments were 4.9%and 9.4%higher than those in the urea(U)treatment;(2)The addition of SAP significantly increased the soil saturation water content and decreased the evaporation rate compared to the no SAP application.The yield and WUE of winter wheat with SAP application was enhanced by 9.6%-12.1%and 12.0%-14.7%,respectively,compared without SAP application;(3)The synergy effect of CRU combined with SAP was better than the single application for CRU or SAP.The CRU combined with 120 kg hm-2 SAP increased the wheat yield,NUE and WUE by 5.0%-53.3%,8.6%-35.6%and6.1%-58.7%compared with the other treatments,respectively.Therefore,application of CRU in combination with SAP exhibited a favorable synergistic effect on the growth,NUE and WUE for winter wheat.
作者
魏蓉
田晓飞
翟胜
褚鹏飞
郭新送
杨伟鹏
范震
WEI Rong;TIAN Xiao-fei;ZHAI Sheng;CHU Peng-fei;GUO Xin-song;YANG Wei-peng;FAN Zhen(School of Environment and Planning,Liaocheng University,Liaocheng 252000,China;School of Agriculture,Liaocheng University,Liaocheng 252000,China;Key Laboratory of Humic Acid Fertilizer,Ministry of Agriculture,Shandong Agricultural University Fertilizer Science Tech.Co.Ltd.,Taian 271000,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2020年第4期936-942,共7页
Chinese Journal of Soil Science
基金
国家自然科学基金(41807092)
山东省高等学校科学技术计划(J18KA173)
聊城大学博士基金(318051839)资助
关键词
包膜尿素
保水剂
冬小麦
产量
利用率
Controlled release urea
Super absorbent polymer
Winter wheat
Yield
Use efficiency
