Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars
Many nitrogen-efficient (N-efficient) maize cultivars have been bred to meet increased food demand and allay urgent environmental concerns, but the effects of these cultivars on increasing N accumulation and reducing N loss in the maize system have not been reported. A two-year field pot experiment...
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2020-07-01
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Online Access: | http://dx.doi.org/10.1080/1343943X.2019.1710221 |
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doaj-83007cce9d644835b4dd8954f4a7c2952020-11-25T03:34:16ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082020-07-0123326026910.1080/1343943X.2019.17102211710221Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivarsQiang Li0Fanlei Kong1Yawei Wu2Dongju Feng3Yuan Jichao4Chongqing University of Arts and SciencesSichuan Agricultural UniversitySichuan Agricultural UniversitySichuan Agricultural UniversitySichuan Agricultural UniversityMany nitrogen-efficient (N-efficient) maize cultivars have been bred to meet increased food demand and allay urgent environmental concerns, but the effects of these cultivars on increasing N accumulation and reducing N loss in the maize system have not been reported. A two-year field pot experiment was conducted in Southwest China to evaluate the advantages of an N-efficient maize cultivar on N accumulation and N loss in 2014 and 2015. The results showed that the N-efficient maize cultivar ZH 311 had higher N uptake and accumulation ability than the N-inefficient maize cultivar XY 508, especially in the middle and late growth stages. ZH 311 maintained higher residual soil inorganic N in the appropriate growth stage, promoting soil N supply capability and enhancing N uptake while decreasing residual soil inorganic N at harvest and reducing the risk of N leaching. Higher nitrogen accumulation and residual soil inorganic N contributed to lower apparent N loss and apparent N loss efficiency for the N-efficient cultivar than for the N-inefficient cultivar. Moreover, N loss during the maize growth season mainly occurred before silking, and the N-efficient maize cultivar could effectively reduce N loss before silking because of its earlier N uptake ability. Overall, the selection of N-efficient maize cultivars is not only an important measure to enhance N use efficiency but also an important means to reduce the loss of N and environmental pollution, especially at low and medium N levels.http://dx.doi.org/10.1080/1343943X.2019.1710221maizen-efficient cultivarn accumulationsoil mineral nn loss |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qiang Li Fanlei Kong Yawei Wu Dongju Feng Yuan Jichao |
spellingShingle |
Qiang Li Fanlei Kong Yawei Wu Dongju Feng Yuan Jichao Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars Plant Production Science maize n-efficient cultivar n accumulation soil mineral n n loss |
author_facet |
Qiang Li Fanlei Kong Yawei Wu Dongju Feng Yuan Jichao |
author_sort |
Qiang Li |
title |
Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars |
title_short |
Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars |
title_full |
Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars |
title_fullStr |
Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars |
title_full_unstemmed |
Increasing nitrogen accumulation and reducing nitrogen loss with N-efficient maize cultivars |
title_sort |
increasing nitrogen accumulation and reducing nitrogen loss with n-efficient maize cultivars |
publisher |
Taylor & Francis Group |
series |
Plant Production Science |
issn |
1343-943X 1349-1008 |
publishDate |
2020-07-01 |
description |
Many nitrogen-efficient (N-efficient) maize cultivars have been bred to meet increased food demand and allay urgent environmental concerns, but the effects of these cultivars on increasing N accumulation and reducing N loss in the maize system have not been reported. A two-year field pot experiment was conducted in Southwest China to evaluate the advantages of an N-efficient maize cultivar on N accumulation and N loss in 2014 and 2015. The results showed that the N-efficient maize cultivar ZH 311 had higher N uptake and accumulation ability than the N-inefficient maize cultivar XY 508, especially in the middle and late growth stages. ZH 311 maintained higher residual soil inorganic N in the appropriate growth stage, promoting soil N supply capability and enhancing N uptake while decreasing residual soil inorganic N at harvest and reducing the risk of N leaching. Higher nitrogen accumulation and residual soil inorganic N contributed to lower apparent N loss and apparent N loss efficiency for the N-efficient cultivar than for the N-inefficient cultivar. Moreover, N loss during the maize growth season mainly occurred before silking, and the N-efficient maize cultivar could effectively reduce N loss before silking because of its earlier N uptake ability. Overall, the selection of N-efficient maize cultivars is not only an important measure to enhance N use efficiency but also an important means to reduce the loss of N and environmental pollution, especially at low and medium N levels. |
topic |
maize n-efficient cultivar n accumulation soil mineral n n loss |
url |
http://dx.doi.org/10.1080/1343943X.2019.1710221 |
work_keys_str_mv |
AT qiangli increasingnitrogenaccumulationandreducingnitrogenlosswithnefficientmaizecultivars AT fanleikong increasingnitrogenaccumulationandreducingnitrogenlosswithnefficientmaizecultivars AT yaweiwu increasingnitrogenaccumulationandreducingnitrogenlosswithnefficientmaizecultivars AT dongjufeng increasingnitrogenaccumulationandreducingnitrogenlosswithnefficientmaizecultivars AT yuanjichao increasingnitrogenaccumulationandreducingnitrogenlosswithnefficientmaizecultivars |
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1724559656886468608 |