Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

The frequent occurrence of drought–flood abrupt alternation (DFAA) in Huaibei Plain has shown a great impact on local rice production. Pot experiments were performed in 2016–2018 to investigate the effects of co-occurring drought and flooding stresses on dry weight (DW), grain yield, nitrogen (N), p...

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Autores principales:	Jie Huang, Fengyan Wu, Tiesong Hu, Luguang Liu, Jing Wang, Xin Wang, Changmei Liang, Jia Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	drought flood root growth N, P and K grain yield Agriculture S
Acceso en línea:	https://doaj.org/article/ecef3a181efb43a98c60a997761049f0
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spelling	oai:doaj.org-article:ecef3a181efb43a98c60a997761049f02021-11-25T16:02:42ZInteractive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice10.3390/agronomy111121032073-4395https://doaj.org/article/ecef3a181efb43a98c60a997761049f02021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2103https://doaj.org/toc/2073-4395The frequent occurrence of drought–flood abrupt alternation (DFAA) in Huaibei Plain has shown a great impact on local rice production. Pot experiments were performed in 2016–2018 to investigate the effects of co-occurring drought and flooding stresses on dry weight (DW), grain yield, nitrogen (N), phosphorus (P) and potassium (K) uptake and use efficiencies (NUE, PUE and KUE) in rice. The results showed that DFAA changed the accumulation of biomass and nutrients among different organs in rice. Compared with control, DFAA significantly reduced the grain yield (−29.8%) and root DW (−30.0%), but increased the DW in stem and leaf (10.2% and 9.7%). The root/shoot ratio and morphological size of the root system in DFAA-treated plants was smaller than those of drought alone and flooding alone. Under DFAA stresses, the specific absorption rate of N, P and K increased significantly (47.9%, 31.8% and 32.8%, respectively), while NUE, PUE and KUE decreased significantly (−27.9%, −10.8% and −19.7%, respectively). The decrease of nutrient use efficiencies was mainly due to the redundant growth of branches and leaves, and the key factor limiting grain yield under DFAA conditions was the effective utilization of N. Compared with the earlier drought, the subsequent flooding might have more influence on rice growth, nutrient utilization and yield formation, but the interaction of the two weakened the cumulative effect of drought and flooding. These findings provide a scientific basis for establishing a nutrient and water management system of rice cultivation under transient soil moisture conditions.Jie HuangFengyan WuTiesong HuLuguang LiuJing WangXin WangChangmei LiangJia LiuMDPI AGarticledroughtfloodroot growthN, P and Kgrain yieldAgricultureSENAgronomy, Vol 11, Iss 2103, p 2103 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drought flood root growth N, P and K grain yield Agriculture S
spellingShingle	drought flood root growth N, P and K grain yield Agriculture S Jie Huang Fengyan Wu Tiesong Hu Luguang Liu Jing Wang Xin Wang Changmei Liang Jia Liu Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
description	The frequent occurrence of drought–flood abrupt alternation (DFAA) in Huaibei Plain has shown a great impact on local rice production. Pot experiments were performed in 2016–2018 to investigate the effects of co-occurring drought and flooding stresses on dry weight (DW), grain yield, nitrogen (N), phosphorus (P) and potassium (K) uptake and use efficiencies (NUE, PUE and KUE) in rice. The results showed that DFAA changed the accumulation of biomass and nutrients among different organs in rice. Compared with control, DFAA significantly reduced the grain yield (−29.8%) and root DW (−30.0%), but increased the DW in stem and leaf (10.2% and 9.7%). The root/shoot ratio and morphological size of the root system in DFAA-treated plants was smaller than those of drought alone and flooding alone. Under DFAA stresses, the specific absorption rate of N, P and K increased significantly (47.9%, 31.8% and 32.8%, respectively), while NUE, PUE and KUE decreased significantly (−27.9%, −10.8% and −19.7%, respectively). The decrease of nutrient use efficiencies was mainly due to the redundant growth of branches and leaves, and the key factor limiting grain yield under DFAA conditions was the effective utilization of N. Compared with the earlier drought, the subsequent flooding might have more influence on rice growth, nutrient utilization and yield formation, but the interaction of the two weakened the cumulative effect of drought and flooding. These findings provide a scientific basis for establishing a nutrient and water management system of rice cultivation under transient soil moisture conditions.
format	article
author	Jie Huang Fengyan Wu Tiesong Hu Luguang Liu Jing Wang Xin Wang Changmei Liang Jia Liu
author_facet	Jie Huang Fengyan Wu Tiesong Hu Luguang Liu Jing Wang Xin Wang Changmei Liang Jia Liu
author_sort	Jie Huang
title	Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
title_short	Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
title_full	Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
title_fullStr	Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
title_full_unstemmed	Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice
title_sort	interactive effects of drought–flood abrupt alternation on morpho-agronomic and nutrient use traits in rice
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ecef3a181efb43a98c60a997761049f0
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Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

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