Effects of Planting Density and Soil Moisture on Flag Leaf Photosynthetic Characteristics and Dry Matter Accumulation and Distribution in Wheat

Luo, Lan-Ping; Yu, Zhen-Wen; Wang, Dong; Zhang, Yongli; Yu, Shen

doi:10.3724/sp.j.1006.2011.01049

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…A 3 year study 21 in a semi‐arid region showed that NT significantly increased SWC at a depth of 0–90 cm, while the lowest SWC was observed with conventional tillage (CT). Increased SWC improves the chlorophyll content 1 and photosynthesis of leaves, 22,23 which correspondingly enhances grain filling 24 . Increased chlorophyll delays leaf senescence and increases the assimilation rate 25 .…”

Section: Introductionmentioning

confidence: 99%

Conservation tillage improves the yield of summer maize by regulating soil water, photosynthesis and inferior kernel grain filling on the semiarid Loess Plateau, China

Wang

Sun

et al. 2021

J Sci Food Agric

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BACKGROUND Poor inferior kernel grain filling is a challenge that limits summer maize yield. The effect and mechanism of conservation tillage on improving grain filling of inferior kernel in semi‐arid rained areas remain uncertain and there has been little research on tillage management integrated with straw mulching to improve soil water content and photosynthesis in the Loess Plateau region. A 2 year (2019–2020) field experiment was established to study the impact of tillage practices on soil water content and summer maize root system morphology, photosynthetic capacity, inferior kernel grain filling, and grain yield. Treatments included reduced tillage (RT), no tillage (NT), and conventional tillage (CT). RESULTS Under RT and NT, the final 100‐kernel weight and maximum and mean grain filling rates were higher than CT. Reduced tillage and NT increased soil water content at the jointing stage, silking stage and grain filling stage in comparison with CT. They increased root system morphology and dry matter accumulation, net photosynthetic rate, transpiration efficiency, and stomatal conductance in comparison with CT, and they also decreased intercellular CO2 concentration, and they increased chlorophyll content and above‐ground dry matter accumulation in comparison with CT. Reduced tillage and NT increased evapotranspiration of maize, and ultimately, increased grain yield by 17% and 14%, respectively, in comparison with CT. CONCLUSION Conservation tillage could promote summer maize photosynthetic capacity and grain filling of inferior kernels by regulating soil water content and root system morphology. © 2021 Society of Chemical Industry.

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Section: Introductionmentioning

confidence: 99%

Conservation tillage improves the yield of summer maize by regulating soil water, photosynthesis and inferior kernel grain filling on the semiarid Loess Plateau, China

Wang

Sun

et al. 2021

J Sci Food Agric

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“…Soil water content is the key element that controls the leaf gas exchange, dry matter contents (DMC), grain yield/shoot biomass per plant and water use efficiency (Qiu et al, 2008). By improving the soil water content elevated photosynthetic characteristics and more grain filling can be achieved with higher grain yield of winter wheat (Lou et al, 2011;Xue et al, 2006). Research studies showed that water stress during wheat anthesis reduce down the photosynthetic values and senescence of flag leaf (Wu et al, 2014;Yang et al, 2000).…”

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confidence: 99%

Physiological Manipulation and Yield Response of Wheat Grown with Split Root System under Deficit Irrigation

Iqbal¹,

Andersen²,

Raza³

et al. 2019

PJAR

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W heat is an imperative grain crop and a staple food of many countries around the globe. Water scarcity during the anthesis stage of wheat reduces the grain production. Due to low rainfall and ever rising temperature, the risk of drought at anthesis or post anthesis stages of wheat is alarming in semi arid areas of the world. Drought stress at anthesis stage causes the abortion of wheat grains (Rajala et al., 2009) and also affects the process of grain filling. It results in grain shrinkage (dried-up) and responsible for reduction in grain yield (Dias de Oliverira et al., 2013;Mitchell et al., 2013). Water is the key element in determining the wheat yield when it is used at anthesis or post anthesis stage (Manschadi et al., 2006). Threats of drought for agricultural production areAbstract | Water shortage is the main limitation for agricultural production in many parts of the world. Drought or unavailability of water may seriously limit plant growth as well as yield. A pot experiment was carried out to evaluate the effects of various irrigation strategies i.e. Full (FI), deficit (DI) and partial rootzone drying (PRD) on physiological, water relations, water use efficiency (WUE), and yield related attributes of wheat. These irrigation treatments were started at anthesis stage and maintained for 30 days. For FI and DI, 100 and 50% of evapotranspiration (ET) was replaced by irrigating the entire pot surface every 4-5 days. For PRD, root system was split into two equal halves and during each irrigation event, only one-half of the root system was irrigated with the same amount of water as applied to DI, and subsequently, irrigation was switched to the second half. PRD irrigation significantly improved WUE (both photosynthetic and intrinsic) and instantaneous carboxylation efficiency of Rubisco than FI and DI. Higher Abscisic acid (ABA) production under PRD reduced stomatal conductance, net photosynthesis and transpiration rate. Magnitude of osmotic adjustment (i.e. leaf water, osmotic and tugor potential) was lowest and highest under FI, DI and PRD, respectively. However, PRD had lower shoot biomass and grain yield per plant as compared to FI but higher than the DI. Despite improving the WUE, PRD tended to compromise the yield of wheat crop but PRD is recommended instead of DI. Results imply that PRD treatment can be an option under water shortage; however, its suitability and efficacy should further be tested under field conditions.

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Effects of water stress on photosynthetic characteristics, dry matter translocation and WUE in two winter wheat genotypes

Liu

Mei

Yan

et al. 2016

Agricultural Water Management

168

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Effects of Planting Density and Soil Moisture on Flag Leaf Photosynthetic Characteristics and Dry Matter Accumulation and Distribution in Wheat

Cited by 4 publications

References 11 publications

Conservation tillage improves the yield of summer maize by regulating soil water, photosynthesis and inferior kernel grain filling on the semiarid Loess Plateau, China

Conservation tillage improves the yield of summer maize by regulating soil water, photosynthesis and inferior kernel grain filling on the semiarid Loess Plateau, China

Physiological Manipulation and Yield Response of Wheat Grown with Split Root System under Deficit Irrigation

Effects of water stress on photosynthetic characteristics, dry matter translocation and WUE in two winter wheat genotypes

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