Tillage practices effect on root distribution and water use efficiency of winter wheat under rain-fed condition in the North China Plain

Guan, Dahai; Zhang, Yushi; Al‐Kaisi, Mahdi; Wang, Qingyan; Zhang, Mingcai; Li, Zhaohu

doi:10.1016/j.still.2014.09.016

Cited by 174 publications

(122 citation statements)

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“…One example of this is the September 2015 rain events on the 6, 17, and 18th (10.2, 1.5, and 4.6 mm rainfall, respectively) that resulted in the largest difference in simulated E between CAF-NT and CAF-CT ( Figure 6B). The simulated daily T was only influenced by tillage practices during the winter wheat growing season and the difference between CAF-NT and CAF-CT was consistent with the finding in Guan et al (2015) where they concluded that ET (mostly T during MGS) under tilled conditions was greater than ET under no-till from seeding to flowering stages, but smaller at the ripening stage.…”

Section: Tillage Practice Effects On Annual Cropping Areasupporting

confidence: 82%

“…The similar modeled water budgets at the two sites suggested that tillage practices had insignificant effects on ET, which has also been found over different crop fields, such as winter wheat, spring garbanzo, canola, corns, and soybean (Borstlap and Entz, 1994;Tan et al, 2002;Liu et al, 2013;Zhang et al, 2013;Guan et al, 2015;Chi et al, 2016). Daily E differences between the two sites were a good indicator of how the different soil conditions affect the direct water losses from the soil surfaces.…”

Section: Tillage Practice Effects On Annual Cropping Areasupporting

confidence: 55%

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Carbon and Water Budgets in Multiple Wheat-Based Cropping Systems in the Inland Pacific Northwest US: Comparison of CropSyst Simulations with Eddy Covariance Measurements

et al. 2017

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Accurate carbon and water flux simulations for croplands are greatly dependent on high quality representation of management practices and meteorological conditions, which are key drivers of the surface-atmosphere exchange processes. Fourteen site-years of carbon and water fluxes were simulated using the CropSyst model over four agricultural sites in the inland Pacific Northwest (iPNW) US from October 1, 2011 to September 30, 2015. Model performance for field-scale net ecosystem exchange of CO 2 (NEE) and evapotranspiration (ET) was evaluated by comparing simulations with long-term eddy covariance measurements. The model captured the temporal variations of NEE and ET reasonably well with an overall r of 0.78 and 0.80, and a low RMSE of 1.82 g C m −2 d −1 and 0.84 mm d −1 for NEE and ET, respectively. The model slightly underestimated NEE and ET by 0.51 g C m −2 d −1 and 0.09 mm d −1 , respectively. ET simulations showed better agreement with eddy covariance measurements than NEE. The model performed much better for the sites with detailed initial conditions (e.g., SOC content) and management practice information (e.g., tillage type). The CropSyst results showed that the winter wheat fields could be annual net carbon sinks or close to neutral with the net ecosystem carbon balance (NECB) ranging from 92 to −17 g C m −2 , while the spring crop fields were net carbon sources or neutral with an annual NECB of −327 to −3 g C m −2 . Simulations for the paired tillage sites showed that the no-till site resulted in lower CO 2 emissions for the crop rotations of winter wheat-spring garbanzo, but had higher carbon loss into the atmosphere for spring canola compared to the conventional tillage site. Water budgets did not differ significantly between the two tillage systems. Winter wheat in the high-rainfall area had higher crop yields and water use efficiency but emitted larger amounts of CO 2 into the atmosphere than in the low-rainfall area. Based Chi et al.Agricultural Carbon and Water Budgets on model evaluations in this study, CropSyst appears promising as a tool to simulate field-scale carbon and water budgets and assess the effects of different management practices and local meteorological conditions for the wheat-based cropping systems in this region.

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Section: Tillage Practice Effects On Annual Cropping Areasupporting

confidence: 82%

Section: Tillage Practice Effects On Annual Cropping Areasupporting

confidence: 55%

Carbon and Water Budgets in Multiple Wheat-Based Cropping Systems in the Inland Pacific Northwest US: Comparison of CropSyst Simulations with Eddy Covariance Measurements

et al. 2017

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“…In the North China Plain, the rainfall during the entire growth stage in wheat is far below the actual water demand level (Cao et al, 2003), which results in large decline of the groundwater resource and reduction of the irrigation area of winter wheat during past 20 years (Jia, Liu, 2002). Therefore, it is critical to improve the water use efficiency (WUE) in winter wheat production on which to promote the sustainable agriculture in North China (Guan et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Physiological response of plants to polyethylene glycol (PEG-6000) by exogenous melatonin application in wheat

Zhang

Wang

et al. 2017

Zemdirbyste-Agriculture

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The regulation effect of melatonin on water use efficiency of leaf and potential mechanisms related to phytohormone of leaf/root were investigated using two wheat (Triticum aestivum L.) cultivars with contrasting drought tolerance: drought-tolerant 'Hengguan35' (HG35) and growing in irrigated fields 'Jimai22' (JM22). Four treatments, including normal water treatment (N), 20% polyethylene glycol (PEG) (P), P + 1 μM melatonin and P + 10 μM melatonin were conducted. Results indicated that exogenous melatonin could significantly improve net photosynthetic rate (Pn), instantaneous water use efficiency (WUE inst. ) and intrinsic water use efficiency (WUE intr. ) of cultivar 'Jimai22'. This was possibly related to increasing root auxin (IAA), zeatin riboside (ZR) content and inhibiting abscisic acid (ABA), hydrogen peroxide (H 2 O 2 ) and aminocyclopropane-1-carboxylic acid (ACC) production in leaf. However, for cultivar 'Hengguan35', 1 μM and 10 μM melatonin did not improve photosynthetic rate and chlorophyll content even took negative effect on that. This could be caused by high vapour pressure deficit (VPD) and high H 2 O 2 contents in leaf. Also, as a drought-tolerant cultivar, 'Hengguan35' possesses some physiological regulation itself such as increasing IAA and ZR content in root and leaf, inhibiting H 2 O 2 production in root. But ABA and ACC content in root was not inhibited, even increased with melatonin under drought treatment. ACC was a potential central player in the hormone cross-talks that regulated leaf and root growth and physiological function. These results suggest that the effect of exogenous melatonin application on drought-resistance in seedling was distinct owing to wheat cultivars with different drought sensitivity, and this was also involved in complicated mechanism of physiological regulation to keep water status. Suitable application of melatonin thus can be an effective way in improving plant drought tolerance in wheat.

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“…Penetration resistance relative to tillage practices has also been studied [17]- [20]. Guan et al [14] observed the effects of plow tillage, rotary tillage and no-till on root weight density. Finally, the effects of various tillage practices on organic content were observed by several researchers [8] [11] [21].…”

Section: Weedsmentioning

confidence: 99%

Primitive Geometry Tillage Modeling

Frink¹,

Flippo²,

Sharda³

2016

OJSS

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Tillage practices have a significant effect on soil properties. Understanding the specific effects due to geometric and speed parameters of the tillage implement is the key to selecting a tillage practice that is best for a field. This is the first step of many towards optimizing an efficient tillage implement given initial field conditions and desired final conditions. Simple, small-scale tests were performed on idealized implement geometries as a proof-of-concept for future large-scale tests. The results of these tests are presented here and in-depth analysis will be presented in future work.

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Tillage practices effect on root distribution and water use efficiency of winter wheat under rain-fed condition in the North China Plain

Cited by 174 publications

References 46 publications

Carbon and Water Budgets in Multiple Wheat-Based Cropping Systems in the Inland Pacific Northwest US: Comparison of CropSyst Simulations with Eddy Covariance Measurements

Carbon and Water Budgets in Multiple Wheat-Based Cropping Systems in the Inland Pacific Northwest US: Comparison of CropSyst Simulations with Eddy Covariance Measurements

Physiological response of plants to polyethylene glycol (PEG-6000) by exogenous melatonin application in wheat

Primitive Geometry Tillage Modeling

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