Determinants of the accuracy of using carbon isotopes in estimating water use efficiency of selected cereal and legume crops: A global perspective

被引:4
作者
Mutanda, Maltase [1 ,2 ]
Chaplot, Vincent [2 ,3 ]
Shimelis, Hussein [2 ]
Shamuyarira, Kwame W. [2 ]
Figlan, Sandiswa [1 ]
机构
[1] Univ South Africa, Dept Agr & Anim Hlth, ZA-1709 Florida, South Africa
[2] Univ KwaZulu Natal, Sch Agr Earth & Environm Sci, Pietermaritzburg, South Africa
[3] Inst Rech Developement IRD, Lab Oceanog & Climate Expt & Numer Approaches LOCE, UMR 7159, IRD,C NRS,UPMC,MNHN,IPSL, Paris, France
来源
FOOD AND ENERGY SECURITY | 2024年 / 13卷 / 01期
关键词
carbon isotopic ratio; cereal crops; estimated water use efficiency; legume crops observed water use efficiency; GAS-EXCHANGE; SPRING WHEAT; DISCRIMINATION; SOIL; NITROGEN; DROUGHT; YIELD; RICE; ENVIRONMENTS; PRODUCTIVITY;
D O I
10.1002/fes3.522
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Field assessments of crop water use efficiency (WUE) are resource-consuming since they require simultaneous assessment of the total amount of water assimilated by crops for biomass and/or grain production. Alternative methods exist, such as estimating the carbon isotopic ratio (C-13/C-12) of the crop's leaf, aboveground biomass, or grain samples. There is limited information on the determinants of the accuracy of carbon isotopes in estimating water use efficiency between crop types and environments. Therefore, this study aimed to evaluate the extent to which the estimation of the C-13/C-12 ratio in crop parts constitutes an accurate proxy of WUE, globally. Data on observed WUE (WUEobs) were collated involving 518 experiments conducted worldwide on major cereals and legumes and compared with WUE estimates (WUEest) from carbon isotopes. The mean WUEobs among all experiments was 3.4 g L-1 and the mean absolute error (MAE) was 0.5 g L-1 or 14.7% of WUEobs, corresponding to accurate predictions at p < 0.05. However, the percentage mean absolute error of observed water use efficiency (%MAE) estimated from grains was 3.6 +/- 11.5%, which was lower than the %MAE from aboveground biomass collected at harvest (3 +/- 22.8%). In addition, the %MAE increased from 1.1 +/- 5.1% for soybean, 1.6 +/- 7.2% for maize, 1.2 +/- 8.6% for rice, 1.8 +/- 12.1% for groundnut, 2.1 +/- 14.3% for cowpea, 2.3 +/- 16.2% for bush bean, 1.8 +/- 19.9% for wheat, 2.2 +/- 21.4% for barley to 6.3 +/- 39.3% for oat, with only the latter corresponding to significant errors. WUEest were, in all cases, unbiased but slightly overestimated from 0.8% (maize) to 15.4% (oat). The accuracy in estimating WUE significantly decreased with the increase in soil clay content, with sand, showing a positive correlation of 0.3 with %MAE, but negatively correlated with the silt content (r = -0.4). Furthermore, a multivariate analysis pointed out a tendency for prediction errors and bias to increase with the decrease in WUEobs and air temperature. Using carbon isotopes for estimating crop WUE thus appeared reliable for all crops and world environments, provided grain samples are considered. The technique tended to perform better under high WUE conditions, such as those generally found in maize and soybean cropping systems. The identified factors that affect the accuracy of using carbon isotopes in measuring WUE provide valuable insights for water resource management and sustainable crop production. These findings contribute to the ongoing discourse on water conservation strategies in agriculture, offering a basis for decision-making in crop improvement programs. Implementing the recommended practices from this study can potentially improve yield gains and promote resilient and sustainable agricultural systems in the changing environmental circumstances. Further research should investigate the mechanisms that cause low accuracy of the isotopic technique using aboveground biomass and under arid and cool environments.
引用
收藏
页数:19
相关论文
共 86 条
[1]  
Akhter J, 2010, PAK J BOT, V42, P3887
[2]  
Akhter J., 2012, Greater agronomic water use efficiency in wheat and rice using carbon isotope discrimination, P105
[3]   Relationship of carbon isotope discrimination to water use efficiency and productivity of barley under field and greenhouse conditions [J].
Anyia, A. O. ;
Slaski, J. J. ;
Nyachiro, J. M. ;
Archambault, D. J. ;
Juskiw, P. .
JOURNAL OF AGRONOMY AND CROP SCIENCE, 2007, 193 (05) :313-323
[4]   Infiltration efficiency and subsurface water processes of a sustainable drainage system and consequences to flood management [J].
Archer, Nicole A. L. ;
Bell, Rachel A. ;
Butcher, Andrew S. ;
Bricker, Stephanie H. .
JOURNAL OF FLOOD RISK MANAGEMENT, 2020, 13 (03)
[5]   Carbon isotope discrimination as indicator of water-use efficiency of spring wheat as affected by salinity and gypsum addition [J].
Arslan, A ;
Zapata, F ;
Kumarasinghe, KS .
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 1999, 30 (19-20) :2681-2693
[6]   Carbon isotope composition, water use efficiency, and drought sensitivity are controlled by a common genomic segment in maize [J].
Avramova, Viktoriya ;
Meziane, Adel ;
Bauer, Eva ;
Blankenagel, Sonja ;
Eggels, Stella ;
Gresset, Sebastian ;
Grill, Erwin ;
Niculaes, Claudiu ;
Ouzunova, Milena ;
Poppenberger, Brigitte ;
Presterl, Thomas ;
Rozhon, Wilfried ;
Welcker, Claude ;
Yang, Zhenyu ;
Tardieu, Francois ;
Schoen, Chris-Carolin .
THEORETICAL AND APPLIED GENETICS, 2019, 132 (01) :53-63
[7]  
Briggs LJ., 1913, Bureau of Plant Industry Bulletin, P282, DOI DOI 10.5962/BHL.TITLE.119193
[8]   Tillage effects on the soil water balance and the use of water by oats and wheat in a Mediterranean climate [J].
Brunel-Saldias, Nidia ;
Seguel, Oscar ;
Ovalle, Carlos ;
Acevedo, Edmundo ;
Martinez, Ingrid .
SOIL & TILLAGE RESEARCH, 2018, 184 :68-77
[9]  
Cai J., 1992, Doctoral Dissertation
[10]   Biochar can increase nitrogen use efficiency of Malus hupehensis by modulating nitrate reduction of soil and root [J].
Cao, Hui ;
Ning, Liufang ;
Xun, Mi ;
Feng, Feng ;
Li, Ping ;
Yue, Songqing ;
Song, Jianfei ;
Zhang, Weiwei ;
Yang, Hongqiang .
APPLIED SOIL ECOLOGY, 2019, 135 :25-32