Nitrogen fertilization improved water-use efficiency of winter wheat through increasing water use during vegetative rather than grain filling

Wang, Lin Lin; Palta, Jairo A.; Chen, Wei; Chen, Yinglong; Deng, Xin

doi:10.1016/j.agwat.2017.11.010

Cited by 102 publications

(63 citation statements)

References 57 publications

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“…The volumetric moisture content for the 0-5 and 5-10 cm soil depths was calculated by weight moisture content multiplied by corresponding soil bulk density. Evapotranspiration (ET) was calculated using the following equation [9]:…”

Section: Soil Water Content Evapotranspiration and Evaporationmentioning

confidence: 99%

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Conservation Tillage Increases Water Use Efficiency of Spring Wheat by Optimizing Water Transfer in a Semi-Arid Environment

et al. 2019

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Water availability is a major constraint for crop production in semiarid environments. The impact of tillage practices on water potential gradient, water transfer resistance, yield, and water use efficiency (WUEg) of spring wheat was determined on the western Loess Plateau. Six tillage practices implemented in 2001 and their effects were determined in 2016 and 2017 including conventional tillage with no straw (T), no-till with straw cover (NTS), no-till with no straw (NT), conventional tillage with straw incorporated (TS), conventional tillage with plastic mulch (TP), and no-till with plastic mulch (NTP). No-till with straw cover, TP, and NTP significantly improved soil water potential at the seedling stage by 42, 47, and 57%, respectively; root water potential at the seedling stage by 34, 35, and 51%, respectively; leaf water potential at the seedling stage by 37, 48, and 42%, respectively; tillering stage by 21, 24, and 30%, respectively; jointing stage by 28, 32, and 36%, respectively; and flowering stage by 10, 26, and 16%, respectively, compared to T. These treatments also significantly reduced the soil–leaf water potential gradient at the 0–10 cm soil depth at the seedling stage by 35, 48, and 35%, respectively, and at the 30–50 cm soil depth at flowering by 62, 46, and 65%, respectively, compared to T. Thus, NTS, TP, and NTP reduced soil–leaf water transfer resistance and enhanced transpiration. Compared to T, the NTS, TP, and NTP practices increased biomass yield by 18, 36, and 40%; grain yield by 28, 22, and 24%; and WUEg by 24, 26, and 24%, respectively. These results demonstrate that no-till with straw mulch and plastic mulching with either no-till or conventional tillage decrease the soil–leaf water potential gradient and soil–leaf water transfer resistance and enhance sustainable intensification of wheat production in semi-arid areas.

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Section: Soil Water Content Evapotranspiration and Evaporationmentioning

confidence: 99%

“…All straw and chaff from stubble incorporated treatments were returned to the original plots immediately after threshing. Water use efficiency was calculated using following equations [9]:…”

Section: Yield and Water Use Efficiencymentioning

confidence: 99%

Conservation Tillage Increases Water Use Efficiency of Spring Wheat by Optimizing Water Transfer in a Semi-Arid Environment

et al. 2019

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“…Lu et al (2014) reported that straw mulching decreased yield and nitrogen (N) use in northeastern China. However, studies have demonstrated that plastic film mulching (FM) technology is one of the most effective measures due to the advantages of improving the topsoil temperature, especially in the early spring (Mo et al, 2018; Zhao et al, 2012), raising rainfall utilization and soil moisture content, decreasing the soil evaporation (Li et al, 2016; Wang et al, 2018), and generally improving yield and quality (Chen et al, 2015a, 2015b; Luis et al, 2011) in the arid and semiarid Loess Plateau since the 1970s (Dong et al, 2009; Li et al, 2000).…”

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confidence: 99%

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

et al. 2019

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Controlled‐release urea is considered to enhance crop yields while reducing labor costs from fertilizer dressing, but the impacts can range widely depending on water availability in soil. Therefore, we conducted a 3‐yr field study to evaluate the potential role of controlled‐release urea in improving productivity and resource use efficiency of maize in semiarid areas in China. Treatments were established as two mulching modes (plastic film mulching [FM] and no mulching [NM]) and three nitrogen application modes (no nitrogen fertilizer [CK], a 1:2 ratio of controlled‐release urea to common urea [CRU], and common urea only [U]). Higher temperature and soil water content under FM treatments significantly accelerated maize growth and development, as indicated in terms of a larger leaf area index before silking, greater biomass accumulation, and greater grain yield. More robust plants with controlled‐release urea under mulching can better absorb and utilize deep soil water to increase water use efficiency (WUE). Mean shoot biomass, grain yield, and WUE during the three experimental years were 35.3, 19.0, and 12.4% higher in mulching with CRU treatments than in NM with controlled‐release urea treatments, respectively. Significant interactions existed for yield and WUE among surface mulching (SM), nitrogen fertilizer (NF), and sampling year (Y) in the three experimental years, except for SM × NF for WUE. These results demonstrate that a mixture of controlled‐release urea and U at an appropriate ratio under SM can provide a better water/temperature/nitrogen conditions for maize growth to realize relatively high yield with labor and time savings in semiarid farmland. Core Ideas Film mulching benefits topsoil temperature, soil moisture, and utilization of deeper soil water. Combining controlled‐release urea (CRU) and urea increased yield and resource use. Combing CRU and urea under plastic film increased yield and WUE. One‐time application of CRU + urea at an appropriate ratio will satisfy spring maize in dryland farming systems.

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“…The SWUL of grasslands was higher than that of cropland before the 170th day, mainly because the crops was sown later (about the 110th to 130th day). In the medium and late stage of the growing season, agricultural measures such as irrigation and fertilization might improve the SWUL of cropland (Wang et al, 2018;Zhang et al, 2018a).…”

Section: Discussionmentioning

confidence: 99%

Spatio-Temporal Variations of Soil Water Use in the Growing Season in Northeast China Using Modis Data

Chang¹,

Huang²,

Li³

et al. 2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Water use efficiency is known as an important indicator of carbon and water cycle and reflects the transformation capacity of vegetation water and nutrients into biomass. In this study, we presented a new indicator of water use efficiency, soil water use level (SWUL), derived from satellite remote sensing based gross primary production and the Visible and Shortwave Infrared Drought Index (VSDI). SWUL based on MODIS data was calculated for the growing season of 2014 in Northeast China, and the spatial pattern and the variation trend were analyzed. Results showed that the highest SWUL was observed in forestland with the value of 36.65. In cropland and grassland, the average SWUL were 26.18 and 29.29, respectively. SWUL showed an increased trend in the first half period of the growing season and peaked around the 200th day. After the 220th day, SWUL presented a decreasing trend. Compared to the soil water use efficiency (SWUE), SWUL might depict the water use status at finer spatial resolution. The new indicator SWUL can help promote understanding the water use efficiency for regions of higher spatial heterogeneity.

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Nitrogen fertilization improved water-use efficiency of winter wheat through increasing water use during vegetative rather than grain filling

Cited by 102 publications

References 57 publications

Conservation Tillage Increases Water Use Efficiency of Spring Wheat by Optimizing Water Transfer in a Semi-Arid Environment

Conservation Tillage Increases Water Use Efficiency of Spring Wheat by Optimizing Water Transfer in a Semi-Arid Environment

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

Spatio-Temporal Variations of Soil Water Use in the Growing Season in Northeast China Using Modis Data

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