Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat

ABSTRACT Water resource scarcity has been increasingly becoming a threat to wheat (Triticum aestivum L.) production in North China Plain. Thus, a water-saving irrigation strategy should be urgently developed. We conducted a 2-yr field experiment to examine the effects of supplemental irrigation (SI)...

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Autores principales:	Xu,Jikun, Yu,Zhenwen, Shi,Yu, Guo,Peiwu, Wang,Yuqiu
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2017
Materias:	Dry matter photosynthesis rate quota supplemental irrigation soil moisture testing supplemental irrigation Triticum aestivum.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400346
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spelling	oai:scielo:S0718-583920170004003462018-01-30Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheatXu,JikunYu,ZhenwenShi,YuGuo,PeiwuWang,Yuqiu Dry matter photosynthesis rate quota supplemental irrigation soil moisture testing supplemental irrigation Triticum aestivum. ABSTRACT Water resource scarcity has been increasingly becoming a threat to wheat (Triticum aestivum L.) production in North China Plain. Thus, a water-saving irrigation strategy should be urgently developed. We conducted a 2-yr field experiment to examine the effects of supplemental irrigation (SI) on the photosynthetic characteristics and water use efficiency (WUE) of wheat. This study employed two SI strategies: A quota SI using 60 mm water at jointing and anthesis stages (W1) and soil moisture testing SI (W2), which brings the target relative soil water content of 0-40 cm soil layer to 70% field capacity at jointing and anthesis stages. A non-irrigated treatment (W0) was used as control. Results showed that W2 significantly improved the water uptake in 80-160 cm soil layer compared with W1. Moreover, flag leaf photosynthetic rate, stomatal conductance, and transpiration 14-28 d after anthesis were highest in W2 successively followed by W1 and W0, and the difference was significant. Dry matter (DM) at maturity, DM accumulation post-anthesis and its contribution ratio to grain were significantly higher in W2 than in the other treatments. 13CO2 labeling results indicated that W2 promoted δ13C-photosynthate accumulation in grain. In 2012-2013 growing season, the grain yield increased by 56.05% and 5.74% and WUE increased by 26.17% and 6.34% in W2 compared with those in W0 and W1, respectively. In 2013-2014 growing season, the grain yield increased by 41.82% and 5.90% and WUE increased by 28.24% and 13.03% in W2 compared with those in W0 and W1, respectively. Therefore, W2 is a high-yield and water-saving treatment.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.77 n.4 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400346en10.4067/S0718-58392017000400346
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dry matter photosynthesis rate quota supplemental irrigation soil moisture testing supplemental irrigation Triticum aestivum.
spellingShingle	Dry matter photosynthesis rate quota supplemental irrigation soil moisture testing supplemental irrigation Triticum aestivum. Xu,Jikun Yu,Zhenwen Shi,Yu Guo,Peiwu Wang,Yuqiu Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
description	ABSTRACT Water resource scarcity has been increasingly becoming a threat to wheat (Triticum aestivum L.) production in North China Plain. Thus, a water-saving irrigation strategy should be urgently developed. We conducted a 2-yr field experiment to examine the effects of supplemental irrigation (SI) on the photosynthetic characteristics and water use efficiency (WUE) of wheat. This study employed two SI strategies: A quota SI using 60 mm water at jointing and anthesis stages (W1) and soil moisture testing SI (W2), which brings the target relative soil water content of 0-40 cm soil layer to 70% field capacity at jointing and anthesis stages. A non-irrigated treatment (W0) was used as control. Results showed that W2 significantly improved the water uptake in 80-160 cm soil layer compared with W1. Moreover, flag leaf photosynthetic rate, stomatal conductance, and transpiration 14-28 d after anthesis were highest in W2 successively followed by W1 and W0, and the difference was significant. Dry matter (DM) at maturity, DM accumulation post-anthesis and its contribution ratio to grain were significantly higher in W2 than in the other treatments. 13CO2 labeling results indicated that W2 promoted δ13C-photosynthate accumulation in grain. In 2012-2013 growing season, the grain yield increased by 56.05% and 5.74% and WUE increased by 26.17% and 6.34% in W2 compared with those in W0 and W1, respectively. In 2013-2014 growing season, the grain yield increased by 41.82% and 5.90% and WUE increased by 28.24% and 13.03% in W2 compared with those in W0 and W1, respectively. Therefore, W2 is a high-yield and water-saving treatment.
author	Xu,Jikun Yu,Zhenwen Shi,Yu Guo,Peiwu Wang,Yuqiu
author_facet	Xu,Jikun Yu,Zhenwen Shi,Yu Guo,Peiwu Wang,Yuqiu
author_sort	Xu,Jikun
title	Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
title_short	Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
title_full	Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
title_fullStr	Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
title_full_unstemmed	Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
title_sort	effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400346
work_keys_str_mv	AT xujikun effectofdifferentsupplementalirrigationstrategiesonphotosyntheticcharacteristicsandwateruseefficiencyofwheat AT yuzhenwen effectofdifferentsupplementalirrigationstrategiesonphotosyntheticcharacteristicsandwateruseefficiencyofwheat AT shiyu effectofdifferentsupplementalirrigationstrategiesonphotosyntheticcharacteristicsandwateruseefficiencyofwheat AT guopeiwu effectofdifferentsupplementalirrigationstrategiesonphotosyntheticcharacteristicsandwateruseefficiencyofwheat AT wangyuqiu effectofdifferentsupplementalirrigationstrategiesonphotosyntheticcharacteristicsandwateruseefficiencyofwheat
_version_	1714205372917481472

Effect of different supplemental irrigation strategies on photosynthetic characteristics and water use efficiency of wheat

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