水肥一体化施磷对滴灌高产春玉米产量及肥料利用率的影响
文献类型: 中文期刊
作者: 沈东萍;;张国强;;王克如;;方梁;;王震;;周林立;;薛军;;谢瑞芝;;侯鹏;;明博;;李少昆
作者机构:
关键词: 春玉米;;水溶磷肥;;水肥一体化;;籽粒产量;;磷肥利用率
期刊名称:玉米科学
ISSN: 1005-0906
年卷期: 2021 年
页码:
收录情况: 北大核心(2020版) ; CSCD(2020-2021年度) ; 农林核心(2020版) ; 科技核心(2020版)
摘要: 磷肥的施用方式和施用量对提高作物的产量和磷肥利用效率有重要影响。研究常规一次性施肥和滴灌分次施肥以及不同磷肥用量对玉米生长及磷肥利用效率的影响,为进一步提高滴灌密植高产春玉米产量及肥料利用率提供理论依据。结果表明,在滴灌水肥一体化分次施磷模式下,磷肥用量在90 kg/hm2时玉米产量达到最大(16.66-17.29 t/hm2),比一次性基肥施入产量高8.3%-12.6%,经济效益平均提高11.0%;磷肥偏生产力和农学利用率比一次性基肥施入处理分别提高了44.4%-50%和59.5%-73.65%。总之,在滴灌水肥一体化条件下,在玉米开花前随水分次滴施水溶磷肥能有效提高玉米产量和磷肥利用率,同时能够减少磷肥用量,提高经济效益。
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