Morphological plasticity of root growth under mild water stress increases water use efficiency without reducing yield in maize

Cai, Qingsheng; Sun, Zenghui; Zheng, Jiaming; Zhang, Yue; Liu, Yang; Liu, Feng; Chen, Feng; Zhe, Zhang; Yang, Ning; Evers, Jochem B.; Zhang, Lizhen

doi:10.5194/bg-14-3851-2017

Cited by 29 publications

(15 citation statements)

References 37 publications

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“…Similar to our results, it was reported that the yield WUE of dehydration-tolerant variety was higher than the dehydration susceptible variety and there was no varietal difference of WUE in wheat (Thapa et al, 2018). Also, the high yield WUE values of maize were also associated with their high grain yields, resulting from the high number of grains per plant (Cai et al, 2017;Nagore et al, 2017).…”

Section: Factors In Relation To Water Use Affecting Dehydration Tolersupporting

confidence: 90%

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Matsuura

2019

Plant Production Science

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The objectives of this study are to clarify the relative importance of sink and related factors of dry matter and water use pre-and post-heading in four millet species under severe water deficit. Panicum miliaceum, Panicum sumatrense, Setaria glauca., and S. italica were used. Water deficit (20% soil water content) was imposed from 25 d after sowing until harvest, with 40% soil water as a control. At the heading, half of the leaf area or all leaves on each plant were removed in both the control and the water deficit treatment (Source manipulation). Water deficit treatment markedly decreased the leaf water potential of all species from −2.02 MPa (S. italica) to −1.72MPa (P. miliaceum). The grain yields of water deficit treatment in S. italica, P. miliaceum, S. glauca and P. sumatrense decreased to 62, 48, 31, and 24% of the control, respectively. Four millet species were divided to dehydration-tolerant millet (S. italica and P. miliaceum) and dehydration-susceptible millet (S. glauca and P. sumatrense) by calculating drought susceptibility index. The interspecific difference in dehydration tolerance was accounted for by the number of grains per panicle and the harvest index. The source operation showed that the sink was more important than the source. In conclusion, under severe soil drying, it was considered that S. italica and P. miliaceum showed strong dehydration tolerance because they maintained the number of grains per panicle and did not reduce dry matter production and the partitioning of dry matter to the panicle after heading. Abbreviations: CLA0: all leaves were removed at heading in the control; CLA0.5: half of the leaf area per plant was removed at heading in the control; DAS: days after sowing; DLA0: all leaves were removed at heading in the dehydration treatment; DLA0.5: half of the leaf area was removed at heading in the dry treatment; DSI: drought susceptibility index; NSC: nonstructural carbohydrate; OA: osmotic adjustment; WUE: water use efficiency.

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Section: Factors In Relation To Water Use Affecting Dehydration Tolersupporting

confidence: 90%

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Matsuura

2019

Plant Production Science

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“…Peanut ranks second the most important grain legume food only after soybean (Maingi et al., 2001) and is one of the five most important oilseed products. In semi‐arid environment, such as Liaoning China, rainfed maize frequently suffers drought during growing season (Cai et al., 2017), and sole peanut causes wind erosion because of loosening surface soil at harvest time (Tan et al., 2015). Therefore, farmers grow maize and peanut as a strip intercrop, normally two rows maize intercropped with four rows peanut.…”

Section: Introductionmentioning

confidence: 99%

Does reduced intraspecific competition of the dominant species in intercrops allow for a higher population density?

Wang

Sun

Zhang

et al. 2021

Food and Energy Security

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Dominant species in intercropping experience less resource competition compared with its monoculture. This reduced competition for resources may allow cultivating the dominant species at an increased density in intercropping to obtain greater yield. However, experimental results are inconclusive when the optimal within row density in the sole crop is not well established. Here, we conducted a two‐year experiment to test the hypothesis that optimal within row plant density of dominant species in intercropping would be higher in the intercrop than in the sole crop. We tested three maize densities (3, 4.5, and 6 plants m−1) in both sole maize and two replacement designed intercrops. The row configurations of two intercrops are two rows maize intercropped with four rows peanut (M2P4) and four rows maize intercropped with four rows peanut (M4P4). Peanut was grown at the same plant density of 12 plants m−1 row in both sole crop and intercrops. The results indicated that increasing maize density from the optimal density in monoculture is not worthy of promotion to improve yield in intercropping, which denied our hypothesis. The land equivalent ratios (LER) in the dry year (2017) were higher than the wet year (2016). Maize yields per unit area of the whole intercropping system were highest with densities of 4.5 and 6 plants m−1 row, with no significant difference between these two densities. Maximum maize yields in sole cropping were obtained with maize densities of 6 plants m−1 row. Intercropping provided higher yields at low and intermediate sole crop maize densities, but not at high sole crop maize density. Average land equivalent ratios at 3, 4.5, and 6 plants m−1 of maize were 1.09, 1.04, and 0.95 in 2016, and 1.07, 1.10, and 1.02 in 2017. Our results suggest that intercropping performs better at conditions with less resources than adequate resources.

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“…Compared with other months, the simulation error of jujube and cotton during the middle and late stages of growth (August to September) increased abnormally during the three years. This may be due to the increased water absorption capacity of the root system caused by severe water stress [34,35], which affects the simulation accuracy. The determination and modification of water stress are involved in the dual crop coefficient method, which mainly depends on the soil water consumption coefficient p. For this purpose, based on the 2016 soil moisture content measurement, the soil water consumption coefficient p was calculated.…”

Section: Data Processing and Analysismentioning

confidence: 99%

Estimation of Evapotranspiration of a Jujube/Cotton Intercropping System in an Arid Area Based on the Dual Crop Coefficient Method

Pengrui

Ying-jie

2020

Agriculture

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An accurate estimation of crop evapotranspiration (ETc) in intercropping is critical for a theoretical basis for formulating an intercropping irrigation system of fruit trees and improving the soil moisture condition of orchards in arid regions of Southern Xinjiang. Herein, observational data such as soil moisture and plant physiological indicators were measured in jujube/cotton intercropping in the Aksu region from 2015 to 2017. The evapotranspiration of single-crop jujube and cotton was estimated using the modified dual crop coefficient method. Then, based on the proportion of intercropping crops, the soil water stress coefficient was introduced to estimate the evapotranspiration of the jujube/cotton intercropping. The results show that the model has good applicability to simulate single-crop jujube and cotton, and jujube/cotton intercropping. However, compared with single cropping, the accuracy of simulated daily evapotranspiration was decreased. In addition, adjusting the cotton irrigation amount caused the simulation accuracy to further decrease. From the perspective of interspecies complementarity and competition, cotton dominated the intercropping system and had better tolerance to external environmental changes than jujube trees. Intercropping had negative effects on jujube trees in general, and very obvious positive effects on cotton. Based on the 3-year crop yield, 5-year-old jujube trees are recommended for intercropping. During this time, the yield of cotton under the effect of interspecific complementation increased by 26.47%, and the yield of intercropping jujube was similar to that of single crop. As the jujube tree age increases, the effect of increasing cotton production gradually diminishes. The jujube trees also had a significant reduction in yield due to interspecific competition. Our research supports the dual crop coefficient method as appropriate to estimate crop ETc in intercropping and may be further used to improve irrigation scheduling for jujube/cotton intercropping.

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Morphological plasticity of root growth under mild water stress increases water use efficiency without reducing yield in maize

Cited by 29 publications

References 37 publications

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Factors related water and dry matter during pre- and post- heading in four millet species under severe water deficit

Does reduced intraspecific competition of the dominant species in intercrops allow for a higher population density?

Estimation of Evapotranspiration of a Jujube/Cotton Intercropping System in an Arid Area Based on the Dual Crop Coefficient Method

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