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Water-use efficiency of dryland wheat in response to mulching and tillage practices on the Loess Plateau.

Wang LF, Shangguan ZP - Sci Rep (2015)

Bottom Line: The sequence of water use efficiency (WUE) effect sizes was similar to that of wheat yield for the practices.Wheat yields were more sensitive to soil water at planting covered by plastic film, wheat straw, liquid film, water-permeable plastic film and sand compared to NT, ST and RT.RFM and RT increased the yields of wheat by 18 and 15%, respectively, and corresponding for WUE by 20.11 and 12.50%.

View Article: PubMed Central - PubMed

Affiliation: 1] State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China [2] Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China.

ABSTRACT
Mulching and tillage are widely considered to be major practices for improving soil and water conservation where water is scarce. This paper studied the effects of FM (flat mulching), RFM (ridge-furrow mulching), SM (straw mulching), MTMC (mulching with two materials combined), MOM (mulching with other materials), NT (no-tillage) ST (subsoiling tillage) and RT (rotational tillage) on wheat yield based on a synthesis of 85 recent publications (including 2795 observations at 24 sites) in the Loess Plateau, China. This synthesis suggests that wheat yield was in the range of 259-7898 kg ha(-1) for FM and RFM. The sequence of water use efficiency (WUE) effect sizes was similar to that of wheat yield for the practices. Wheat yields were more sensitive to soil water at planting covered by plastic film, wheat straw, liquid film, water-permeable plastic film and sand compared to NT, ST and RT. RFM and RT increased the yields of wheat by 18 and 15%, respectively, and corresponding for WUE by 20.11 and 12.50%. This synthesis demonstrates that RFM was better for avoiding the risk of reduced production due to lack of precipitation; however, under conditions of better soil moisture, RT and MTMC were also economic.

No MeSH data available.


Related in: MedlinePlus

Relationships of yield, water-use efficiency (WUE), and evapotranspiration (ET) of wheat under three different tillage practices on the Loess Plateau.a: relationship between ET and grain yield; b: relationship between ET and WUE; c: relationship between grain yield and WUE. The relationships are shown by the regression equations and regression lines.
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f5: Relationships of yield, water-use efficiency (WUE), and evapotranspiration (ET) of wheat under three different tillage practices on the Loess Plateau.a: relationship between ET and grain yield; b: relationship between ET and WUE; c: relationship between grain yield and WUE. The relationships are shown by the regression equations and regression lines.

Mentions: In the Loess Plateau, the relationships between grain yield and seasonal ET under different mulching and tillage practices were best described by two quadratic functions obtained by regression analysis after pooling all data sets (Y = −0.020x2 + 24.779x − 2005.200, Fig. 4a; Y = −0.040×2 + 33.016x − 2786.110, Fig. 5a). Grain yield decreased when ET exceeded a certain critical value, approximately 619 mm under the different mulching practices and 413 mm under the different tillage practices in the present study. Wheat required a minimum ET of 112 mm for any grain yield under the five mulching practices (Fig. 4a). Regression analysis also produced parabolic relationships between WUE and ET under different mulching and tillage practices (P < 0.0001). WUE reached a maximum at an ET of 355 mm under the different mulching practices and 283 mm under the different tillage practices, and then greatly decreased (Figs 4b and 5b). The relationship between WUE and yield was shown in Fig. 4c and Fig. 5c. WUE increased linearly as yield increased in the Loess Plateau. In this region, a yield increase of 1 kg ha−1 led to an increase in WUE of 0.002 kg ha−1 mm−1 under the different mulching and tillage practices (R2 = 0.6159, P < 0.0001 and R2 = 0.5226, P < 0.0001, respectively). The results indicate that a higher WUE is generally achieved under higher yields.


Water-use efficiency of dryland wheat in response to mulching and tillage practices on the Loess Plateau.

Wang LF, Shangguan ZP - Sci Rep (2015)

Relationships of yield, water-use efficiency (WUE), and evapotranspiration (ET) of wheat under three different tillage practices on the Loess Plateau.a: relationship between ET and grain yield; b: relationship between ET and WUE; c: relationship between grain yield and WUE. The relationships are shown by the regression equations and regression lines.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507400&req=5

f5: Relationships of yield, water-use efficiency (WUE), and evapotranspiration (ET) of wheat under three different tillage practices on the Loess Plateau.a: relationship between ET and grain yield; b: relationship between ET and WUE; c: relationship between grain yield and WUE. The relationships are shown by the regression equations and regression lines.
Mentions: In the Loess Plateau, the relationships between grain yield and seasonal ET under different mulching and tillage practices were best described by two quadratic functions obtained by regression analysis after pooling all data sets (Y = −0.020x2 + 24.779x − 2005.200, Fig. 4a; Y = −0.040×2 + 33.016x − 2786.110, Fig. 5a). Grain yield decreased when ET exceeded a certain critical value, approximately 619 mm under the different mulching practices and 413 mm under the different tillage practices in the present study. Wheat required a minimum ET of 112 mm for any grain yield under the five mulching practices (Fig. 4a). Regression analysis also produced parabolic relationships between WUE and ET under different mulching and tillage practices (P < 0.0001). WUE reached a maximum at an ET of 355 mm under the different mulching practices and 283 mm under the different tillage practices, and then greatly decreased (Figs 4b and 5b). The relationship between WUE and yield was shown in Fig. 4c and Fig. 5c. WUE increased linearly as yield increased in the Loess Plateau. In this region, a yield increase of 1 kg ha−1 led to an increase in WUE of 0.002 kg ha−1 mm−1 under the different mulching and tillage practices (R2 = 0.6159, P < 0.0001 and R2 = 0.5226, P < 0.0001, respectively). The results indicate that a higher WUE is generally achieved under higher yields.

Bottom Line: The sequence of water use efficiency (WUE) effect sizes was similar to that of wheat yield for the practices.Wheat yields were more sensitive to soil water at planting covered by plastic film, wheat straw, liquid film, water-permeable plastic film and sand compared to NT, ST and RT.RFM and RT increased the yields of wheat by 18 and 15%, respectively, and corresponding for WUE by 20.11 and 12.50%.

View Article: PubMed Central - PubMed

Affiliation: 1] State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China [2] Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China.

ABSTRACT
Mulching and tillage are widely considered to be major practices for improving soil and water conservation where water is scarce. This paper studied the effects of FM (flat mulching), RFM (ridge-furrow mulching), SM (straw mulching), MTMC (mulching with two materials combined), MOM (mulching with other materials), NT (no-tillage) ST (subsoiling tillage) and RT (rotational tillage) on wheat yield based on a synthesis of 85 recent publications (including 2795 observations at 24 sites) in the Loess Plateau, China. This synthesis suggests that wheat yield was in the range of 259-7898 kg ha(-1) for FM and RFM. The sequence of water use efficiency (WUE) effect sizes was similar to that of wheat yield for the practices. Wheat yields were more sensitive to soil water at planting covered by plastic film, wheat straw, liquid film, water-permeable plastic film and sand compared to NT, ST and RT. RFM and RT increased the yields of wheat by 18 and 15%, respectively, and corresponding for WUE by 20.11 and 12.50%. This synthesis demonstrates that RFM was better for avoiding the risk of reduced production due to lack of precipitation; however, under conditions of better soil moisture, RT and MTMC were also economic.

No MeSH data available.


Related in: MedlinePlus