Journal of Agricultural Science and Technology ›› 2022, Vol. 24 ›› Issue (6): 156-165.DOI: 10.13304/j.nykjdb.2021.0200

• BIO-MANUFACTURING & RESOURCE AND ECOLOGY • Previous Articles    

Effects of Mixed Applying of Controlled-release Urea and Conventional Urea on Yield,Water and Nitrogen Utilization of Maize in Dryland

Yi DANG(), Jianjun ZHANG(), Gang ZHAO, Tinglu FAN, Lei WANG, Shangzhong LI, Gang ZHOU   

  1. Key Laboratory of Efficiency Water Utilization of Dryland Farming of Gansu Province Dryland Agriculture Institute,Gansu Academy of Agricultural Science,Lanzhou 730070,China
  • Received:2021-03-11 Accepted:2021-07-07 Online:2022-06-15 Published:2022-06-21
  • Contact: Jianjun ZHANG

控释尿素和普通尿素配施对旱地玉米产量和水氮利用效率的影响

党翼(), 张建军(), 赵刚, 樊廷录, 王磊, 李尚中, 周刚   

  1. 甘肃省农业科学院旱地农业研究所,甘肃省旱作区水资源高效利用重点实验室,兰州 730070
  • 通讯作者: 张建军
  • 作者简介:党翼 E-mail:22126670@qq.com
  • 基金资助:
    甘肃省农业科学院院列项目(2019GAAS28);国家自然科学基金项目(41561067);国家重点研发计划项目(2018YFD0100206);国家现代农业产业技术体系项目(CARS02-55)

Abstract:

To evaluate the impact of mixed applying between controlled-release urea and conventional urea on maize growth, yield and use efficiency of water and nitrogen in dryland, taking Xianyu 335 as material, and 3 mixed applying of conventional and controlled-release urea were set according to the ratio of 7∶3 (T1), 5∶5 (T2), 3∶7 (T3), and no nitrogen fertilizer (CK1), conventional urea only (CK2) and controlled-release urea only (CK3) were as controls. The changes of SPAD value, dry matter accumulation, water consumption, yield and use efficiency of water and fertilizer were determined. The results showed that T3 treatment had high SPAD value and dry matter accumulation during the whole growth period, which balanced the water consumption process and supply of nitrogen nutrients with the nitrogen use efficiency 38.8%. The yield and water use efficiency of T3 treatment were 13 354.5 kg·hm-2 and 33.60 kg·hm-2·mm-1, respectively, which increased by 14.6%~30.1% and 6.8%~15.4% than other nitrogen treatments. And the grain number per spike and 100-grain weight of T3 treatment were 642.2 and 30.8 g, respectively, which increased by 2.0%~6.0% and 3.9%~12.0% than other nitrogen treatments. Therefore, the combination of 70% controlled release urea and 30% conventional urea could improve the growth of spring maize in dryland, and promote yield and water and fertilizer utilization.

Key words: mixture of controlled release nitrogen and urea, yield, water and fertilizer utilization efficiency, growth index

摘要:

为研究控释尿素与普通尿素配施对旱地玉米生长发育、水氮利用效率及产量性状的影响,以先玉335为试验材料,设置不施氮(CK1)、全施普通尿素(CK2)、全施控释尿素(CK3)和普通尿素与控释尿素按照7∶3(T1)、5∶5(T2)、3∶7(T3)比例配施,分析不同处理玉米叶片SPAD值、干物质积累、阶段耗水量、水氮利用效率及产量性状变化。结果表明,T3处理的SPAD值和全生育期干物质积累量较高,均衡了玉米生育期耗水进程,通过协调全生育期氮素养分的均衡供应达到以水促肥的效果,氮肥利用率为38.8%;同时,T3处理的旱地玉米产量和水分利用效率较高,分别为13 354.5 kg·hm-2和33.60 kg·hm-2·mm-1,较其他施氮处理增加14.6%~30.1%和6.8%~15.4%;分析各产量构成因素表明,T3处理的穗粒数和百粒重显著提高,分别为642.2粒和30.8 g,较其他施氮处理增加2.0%~6.0%和3.9%~12.0%。由此表明,70%控释尿素+30%普通尿素配施更有利于促进春玉米生长发育,实现高产和水氮高效利用。

关键词: 控释氮肥和尿素配比, 产量, 水肥利用效率, 生长发育指标

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