滴灌施肥下水氮供应对夏玉米产量、硝态氮和水氮利用效率的影响

【目的】寻找滴灌夏玉米最佳施氮量。【方法】本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,即0、90、180、270 kg/hm2,分别以N0、N1、N2和N3表示。采用完全区组设计,共计8个处理,3次重复。研究了滴灌施肥条件下,灌水定额和氮肥互作对土壤水分消耗、NO3--N运移积累以及夏玉米产量和水氮利用效率的影响。【结果】灌水、氮肥及其交互作用均显著影响夏玉米地上部干物质量、籽粒产量和水氮利用效率。限水灌溉条件下,玉米拔节期—灌浆初期发生中轻度水分亏缺,对后期产量形成产生显著影响,但限水灌溉显著提高了土...

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Published inGuanʻgai paishui xuebao Vol. 38; no. 9; pp. 28 - 35
Main Authors NING Dongfeng, QIN Anzhen, LIU Zhandong, ZHANG, jiyang, LIU, Zhanjun, ZHAO, Ben, XIAO Junfu
Format Journal Article
LanguageChinese
Published Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 01.09.2019
中国农业科学院农田灌溉研究所/农业农村部作物需水与调控重点开放实验室,河南新乡,453002%西北农林科技大学资源与环境学院,陕西 杨凌,712100
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ISSN1672-3317
DOI10.13522/j.cnki.ggps.20190108

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Abstract 【目的】寻找滴灌夏玉米最佳施氮量。【方法】本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,即0、90、180、270 kg/hm2,分别以N0、N1、N2和N3表示。采用完全区组设计,共计8个处理,3次重复。研究了滴灌施肥条件下,灌水定额和氮肥互作对土壤水分消耗、NO3--N运移积累以及夏玉米产量和水氮利用效率的影响。【结果】灌水、氮肥及其交互作用均显著影响夏玉米地上部干物质量、籽粒产量和水氮利用效率。限水灌溉条件下,玉米拔节期—灌浆初期发生中轻度水分亏缺,对后期产量形成产生显著影响,但限水灌溉显著提高了土壤贮水的消耗量和水分利用效率。在2种灌溉水平下,施氮量与产量均成抛物线关系,充分灌溉条件下施氮量264.3 kg/hm2时为转折点,限水灌溉条件下施氮量176.9 kg/hm2为转折点。充分灌溉条件下,随着施氮量的增加氮肥农学利用率呈增加趋势;但在限水灌溉条件下,随着施氮量的增加氮肥农学利用率表现出降低的趋势。随着施氮量增加,各土层土壤硝态氮量显著增加,且60~100 cm土层硝态氮累积所占比例增加。与充分灌溉相比,限水灌溉作物吸氮量降低,各生育期土壤中硝态氮残留增加。【结论】玉米产量对氮素的响应与供水量相关,水分亏缺下,产生最大产量需要的氮素用量随之降低。因此,生产中应根据土壤含水率调整施氮量,以实现最高产量和水肥利用效率。
AbstractList 【目的】寻找滴灌夏玉米最佳施氮量。【方法】本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,即0、90、180、270 kg/hm2,分别以N0、N1、N2和N3表示。采用完全区组设计,共计8个处理,3次重复。研究了滴灌施肥条件下,灌水定额和氮肥互作对土壤水分消耗、NO3--N运移积累以及夏玉米产量和水氮利用效率的影响。【结果】灌水、氮肥及其交互作用均显著影响夏玉米地上部干物质量、籽粒产量和水氮利用效率。限水灌溉条件下,玉米拔节期—灌浆初期发生中轻度水分亏缺,对后期产量形成产生显著影响,但限水灌溉显著提高了土壤贮水的消耗量和水分利用效率。在2种灌溉水平下,施氮量与产量均成抛物线关系,充分灌溉条件下施氮量264.3 kg/hm2时为转折点,限水灌溉条件下施氮量176.9 kg/hm2为转折点。充分灌溉条件下,随着施氮量的增加氮肥农学利用率呈增加趋势;但在限水灌溉条件下,随着施氮量的增加氮肥农学利用率表现出降低的趋势。随着施氮量增加,各土层土壤硝态氮量显著增加,且60~100 cm土层硝态氮累积所占比例增加。与充分灌溉相比,限水灌溉作物吸氮量降低,各生育期土壤中硝态氮残留增加。【结论】玉米产量对氮素的响应与供水量相关,水分亏缺下,产生最大产量需要的氮素用量随之降低。因此,生产中应根据土壤含水率调整施氮量,以实现最高产量和水肥利用效率。
S152.7; [目的]寻找滴灌夏玉米最佳施氮量.[方法]本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,即0、90、180、270 kg/hm2,分别以N0、N1、N2和N3表示.采用完全区组设计,共计8个处理,3次重复.研究了滴灌施肥条件下,灌水定额和氮肥互作对土壤水分消耗、NO3--N运移积累以及夏玉米产量和水氮利用效率的影响.[结果]灌水、氮肥及其交互作用均显著影响夏玉米地上部干物质量、籽粒产量和水氮利用效率.限水灌溉条件下,玉米拔节期—灌浆初期发生中轻度水分亏缺,对后期产量形成产生显著影响,但限水灌溉显著提高了土壤贮水的消耗量和水分利用效率.在2种灌溉水平下,施氮量与产量均成抛物线关系,充分灌溉条件下施氮量264.3 kg/hm2时为转折点,限水灌溉条件下施氮量176.9 kg/hm2为转折点.充分灌溉条件下,随着施氮量的增加氮肥农学利用率呈增加趋势;但在限水灌溉条件下,随着施氮量的增加氮肥农学利用率表现出降低的趋势.随着施氮量增加,各土层土壤硝态氮量显著增加,且60~100 cm土层硝态氮累积所占比例增加.与充分灌溉相比,限水灌溉作物吸氮量降低,各生育期土壤中硝态氮残留增加.[结论]玉米产量对氮素的响应与供水量相关,水分亏缺下,产生最大产量需要的氮素用量随之降低.因此,生产中应根据土壤含水率调整施氮量,以实现最高产量和水肥利用效率.
Author ZHANG, jiyang
ZHAO, Ben
NING Dongfeng
QIN Anzhen
LIU Zhandong
LIU, Zhanjun
XIAO Junfu
AuthorAffiliation 中国农业科学院农田灌溉研究所/农业农村部作物需水与调控重点开放实验室,河南新乡,453002%西北农林科技大学资源与环境学院,陕西 杨凌,712100
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LIU Zhanjun
ZHAO Ben
NING Dongfeng
QIN Anzhen
LIU Zhandong
XIAO Junfu
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Keywords 水氮耦合
滴灌施肥
土壤硝态氮
夏玉米
水氮利用效率
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中国农业科学院农田灌溉研究所/农业农村部作物需水与调控重点开放实验室,河南新乡,453002%西北农林科技大学资源与环境学院,陕西 杨凌,712100
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Snippet 【目的】寻找滴灌夏玉米最佳施氮量。【方法】本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,...
S152.7; [目的]寻找滴灌夏玉米最佳施氮量.[方法]本试验在测坑-防雨棚设施条件下进行,试验设置2个灌水定额,分别为50 mm(WH为充分灌溉)25 mm(WL为限水灌溉);4个氮肥水平,...
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SubjectTerms Accumulation
Availability
Corn
Crop yield
Drip irrigation
Efficiency
Environmental impact
Fertigation
Fertilization
Fertilizer application
Fertilizers
Grain
Growing season
Irrigation
Irrigation effects
Irrigation efficiency
Irrigation water
Light water
Moisture content
Nitrogen
Soil layers
Soil profiles
Soil properties
Soil water
Soil water movement
Water consumption
Water content
Water deficit
Water use
Water use efficiency
Title 滴灌施肥下水氮供应对夏玉米产量、硝态氮和水氮利用效率的影响
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