Datum
2020-12-01Schlagwort
570 Biowissenschaften, Biologie 580 Pflanzen (Botanik) WestafrikaDüngungAmmoniumverbindungenNitrationPerlhirseWurzelWassernutzungMetadata
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Aufsatz
Ammonium fertilization increases pearl millet yield by promoting early root growth, higher tillering, and water use during grain filling in a low P Sahelian soil
Zusammenfassung
Background: Adaptation of pearl millet [Pennisetum glaucum (L.) R. Br.] to low soil phosphorus (P) at early seedling stages and efficient P fertilizer application are crucial for its survival in the West African Sahel. While addition of NH+4-N to P in the microdose technique has been reported to stimulate early growth of pearl millet, there is little information regarding root length (RL) at different timings.
Aims: Our study aimed at assessing the effects of added NH+4-N and NO−3-Nto P on (1) pearl millet agronomic traits such as root and shoot growth and (2) the water use dynamics during the cropping cycle.
Methods: Twenty‐four “RhizoTubes” filled with P‐deficient soil were used to grow pearl millet under three treatments: (T1) placed P addition alone at 0.4 g per seed hole, Pplaced, (T2) Pplaced + NH+4-N, and (T3) Pplaced + NO−3-N. At 2, 3, 4, and 5 weeks after sowing (WAS) we took non‐destructive measurements of RL. Water use (transpiration) was measured from 3.5 to 9 WAS.
Results: At early growth, roots in the topsoil of T2 were longer than T3 and T1 roots (at 4 WAS: 129.3 cm for T2, 87.5 cm for T3, and 93.3 cm for T1, p < 0.05). Total RL at 2 WAS correlated positively with seedling height and final grain yield. Fertilization with NH+4-N reduced the time to flowering and increased the number of tillers and grain yield, whereas addition of NO−3-N increased vegetative dry matter at harvest and water use efficiency.
Conclusions: Our findings suggest that fertilization with NH+4-N plays a critical root stimulating role at early growth stages, seemingly by increasing lateral root initiation, which carries through to a larger water use during grain filling and higher grain yield.
Aims: Our study aimed at assessing the effects of added NH+4-N and NO−3-Nto P on (1) pearl millet agronomic traits such as root and shoot growth and (2) the water use dynamics during the cropping cycle.
Methods: Twenty‐four “RhizoTubes” filled with P‐deficient soil were used to grow pearl millet under three treatments: (T1) placed P addition alone at 0.4 g per seed hole, Pplaced, (T2) Pplaced + NH+4-N, and (T3) Pplaced + NO−3-N. At 2, 3, 4, and 5 weeks after sowing (WAS) we took non‐destructive measurements of RL. Water use (transpiration) was measured from 3.5 to 9 WAS.
Results: At early growth, roots in the topsoil of T2 were longer than T3 and T1 roots (at 4 WAS: 129.3 cm for T2, 87.5 cm for T3, and 93.3 cm for T1, p < 0.05). Total RL at 2 WAS correlated positively with seedling height and final grain yield. Fertilization with NH+4-N reduced the time to flowering and increased the number of tillers and grain yield, whereas addition of NO−3-N increased vegetative dry matter at harvest and water use efficiency.
Conclusions: Our findings suggest that fertilization with NH+4-N plays a critical root stimulating role at early growth stages, seemingly by increasing lateral root initiation, which carries through to a larger water use during grain filling and higher grain yield.
Zitierform
In: Journal of Plant Nutrition and Soil Science (JPNSS) Volume 184 / Issue 1 (2020-12-01) , S. 123-131 ; EISSN 1522-2624Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202102193323,
author={Beggi, Francesca and Vadez, Vincent and Bürkert, Andreas},
title={Ammonium fertilization increases pearl millet yield by promoting early root growth, higher tillering, and water use during grain filling in a low P Sahelian soil},
journal={Journal of Plant Nutrition and Soil Science (JPNSS)},
year={2020}
}
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2021-03-18T09:40:30Z 2021-03-18T09:40:30Z 2020-12-01 doi:10.17170/kobra-202102193323 http://hdl.handle.net/123456789/12648 Gefördert im Rahmen des Projekts DEAL eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ammonium versus nitrate fertilization pearl millet root length Rhizo Tubes West Africa 570 580 Ammonium fertilization increases pearl millet yield by promoting early root growth, higher tillering, and water use during grain filling in a low P Sahelian soil Aufsatz Background: Adaptation of pearl millet [Pennisetum glaucum (L.) R. Br.] to low soil phosphorus (P) at early seedling stages and efficient P fertilizer application are crucial for its survival in the West African Sahel. While addition of NH+4-N to P in the microdose technique has been reported to stimulate early growth of pearl millet, there is little information regarding root length (RL) at different timings. Aims: Our study aimed at assessing the effects of added NH+4-N and NO−3-Nto P on (1) pearl millet agronomic traits such as root and shoot growth and (2) the water use dynamics during the cropping cycle. Methods: Twenty‐four “RhizoTubes” filled with P‐deficient soil were used to grow pearl millet under three treatments: (T1) placed P addition alone at 0.4 g per seed hole, Pplaced, (T2) Pplaced + NH+4-N, and (T3) Pplaced + NO−3-N. At 2, 3, 4, and 5 weeks after sowing (WAS) we took non‐destructive measurements of RL. Water use (transpiration) was measured from 3.5 to 9 WAS. Results: At early growth, roots in the topsoil of T2 were longer than T3 and T1 roots (at 4 WAS: 129.3 cm for T2, 87.5 cm for T3, and 93.3 cm for T1, p < 0.05). Total RL at 2 WAS correlated positively with seedling height and final grain yield. Fertilization with NH+4-N reduced the time to flowering and increased the number of tillers and grain yield, whereas addition of NO−3-N increased vegetative dry matter at harvest and water use efficiency. Conclusions: Our findings suggest that fertilization with NH+4-N plays a critical root stimulating role at early growth stages, seemingly by increasing lateral root initiation, which carries through to a larger water use during grain filling and higher grain yield. open access Beggi, Francesca Vadez, Vincent Bürkert, Andreas doi:10.1002/jpln.202000347 Westafrika Düngung Ammoniumverbindungen Nitration Perlhirse Wurzel Wassernutzung publishedVersion EISSN 1522-2624 Issue 1 Journal of Plant Nutrition and Soil Science (JPNSS) 123-131 Volume 184 false
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