Modeling root growth and the soil–plant–atmosphere continuum of cotton crops

Coelho, Maurício Bernardes; Villalobos, Francisco J.; Mateos, Luciano

doi:10.1016/s0378-3774(02)00165-8

Cited by 27 publications

(8 citation statements)

References 29 publications

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“…In our previous study, N and P absorption decreased significantly after shading, and the effects of shading after flowering were greater than those of shading before flowering (Cui et al, 2013a,b). Most roots were observed in the upper 30 cm of the soil and root biomass decreased with increasing soil depth (Table 3); this result is similar to that of Coelho (Coelho, Villalobos, & Mateos, 2003), who also reported that root biomass decreased as soil depth increased. Most of the roots accumulated in the top 30 cm, which is about 90% of the total root dry weight.…”

Section: Grain Yield and Yield Componentssupporting

confidence: 85%

Grain yield and root characteristics of summer maize (Zea maysL.) under shade stress conditions

Gao

Shi

Dong

et al. 2017

J Agronomy Crop Science

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Low light is a major adversity affecting yield and quality of summer maize in the Huang‐Huai‐Hai region of China. We conducted a field experiment to explore the effects of shading on root development and yield formation in two summer maize hybrids (Zea mays L.), Denghai605 (DH605) and Zhengdan958 (ZD958). The experiment consisted of four treatments (CK: ambient sunlight, S1: shading from tasselling to physiological maturity stage, S2: shading from six‐leaf to tasselling stage, S3: shading from seeding to physiological maturity stage). Shading had a strong impact on the development of roots in the upper soil layer. Shading significantly decreased the root dry weight, root/shoot ratio, root length density, root absorption area and active absorption area. The results showed that treatments in a diminishing sequence of effects on root from S3, S1, S2 to CK. Overall, shading decreased the root morphologic and activity indices, and decreased yield in summer maize. During an average of 2 years, yields of ZD958 in S3, S2 and S1 decreased by 85%, 24% and 55%, yields of DH605 in S3, S2 and S1 decreased by 87%, 26% and 67%, in compare to CK. The results will be useful for hybrid selection and improving cultural practices for enhancing the maize shading resistance in Huang‐Huai‐Hai region.

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Section: Grain Yield and Yield Componentssupporting

confidence: 85%

Grain yield and root characteristics of summer maize (Zea maysL.) under shade stress conditions

Gao

Shi

Dong

et al. 2017

J Agronomy Crop Science

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“…The SPAC principle has been used and verified extensively in earlier research [58][59][60][61]. Recently, Gao et al (2015) [62] testified that the SPAC principle is not only suitable for arid and semiarid areas but also for the relatively humid karst rocky desertification area in the southwest of China.…”

Section: Theoretical Basismentioning

confidence: 99%

Conversion of Blue Water into Green Water for Improving Utilization Ratio of Water Resources in Degraded Karst Areas

Chen

Yang

Zhao

et al. 2016

Water

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Vegetation deterioration and soil loss are the main causes of more precipitation leakages and surface water shortages in degraded karst areas. In order to improve the utilization of water resources in such regions, water storage engineering has been considered; however, site selection and cost associated with the special karstic geological structure have made this difficult. According to the principle of the Soil Plant Atmosphere Continuum, increasing both vegetation cover and soil thickness would change water cycle process, resulting in a transformation from leaked blue water (liquid form) into green water (gas or saturated water form) for terrestrial plant ecosystems, thereby improving the utilization of water resources. Using the Soil Vegetation Atmosphere Transfer model and the geographical distributed approach, this study simulated the conversion from leaked blue water (leakage) into green water in the environs of Guiyang, a typical degraded karst area. The primary results were as follows: (1) Green water in the area accounted for <50% of precipitation, well below the world average of 65%; (2) Vegetation growth played an important role in converting leakage into green water; however, once it increased to 56%, its contribution to reducing leakage decreased sharply; (3) Increasing soil thickness by 20 cm converted the leakage considerably. The order of leakage reduction under different precipitation scenarios was dry year > normal year > rainy year. Thus, increased soil thickness was shown effective in improving the utilization ratio of water resources and in raising the amount of plant ecological water use; (4) The transformation of blue water into green water, which avoids constructions of hydraulic engineering, could provide an alternative solution for the improvement of the utilization of water resources in degraded karst area. Although there are inevitable uncertainties in simulation process, it has important significance for overcoming similar problems.

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“…However, at Day 55 water consumption was lower than the crop evapotranspiration. The results can be related to a soil-water balance model that describes the relationship between the water consumption and crop evapotranspiration to (Blizzard and Boyer 1980;Liu et al 1998;Coelho et al 2003).…”

Section: Potential Evapotranspiration and Water Consumptionmentioning

confidence: 99%

Capillary flow responses in a soil–plant system for modified subsurface precision irrigation

et al. 2013

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Water movement in a soil-plant system was evaluated based on capillary flow in a modified subsurface irrigation system that incorporates a plant-water measuring device. Water from a reservoir tank located underneath the plant pot was supplied to the root zone through a fibrous medium. Evapotranspiration was measured from the water uptake and evaluations were performed based on soil moisture distribution and mass balance. Potential evapotranspiration was used as a reference for the plant-water uptake. Data were obtained from a test plant provided with the modified subsurface irrigation system. The plant was grown in a phytotron under controlled air temperature and humidity, and a comparison was made for different levels of soil moisture condition. The experimental results confirmed the operational efficiency of the modified subsurface irrigation system for precision irrigation.

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Modeling root growth and the soil–plant–atmosphere continuum of cotton crops

Cited by 27 publications

References 29 publications

Grain yield and root characteristics of summer maize (Zea maysL.) under shade stress conditions

Grain yield and root characteristics of summer maize (Zea maysL.) under shade stress conditions

Conversion of Blue Water into Green Water for Improving Utilization Ratio of Water Resources in Degraded Karst Areas

Capillary flow responses in a soil–plant system for modified subsurface precision irrigation

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