Effects of Phosphorus and Water Supply on Yield, Transpirational Water‐Use Efficiency, and Carbon Isotope Discrimination of Pearl Millet

Ck, Hira; Payne, William A.; Sattelmacher, B.

doi:10.2135/cropsci2000.401120x

Cited by 80 publications

(44 citation statements)

References 31 publications

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“…Cheng et al (2004) have also found that as the N supply increases, the amounts of N in both free amino acids and proteins increase whereas the C/N ratio decreases. Water stress together with fertilization increased WUE (i.e., ␦ 13 C) in poplars, this result is consistent with previous studies (Brück et al, 2000;Welander and Ottosson, 2000;Li et al, 2003;Kondo et al, 2004) stating that WUE is significantly lower in well-watered treatments than in waterstressed treatments, but it increases with an increasing nutrient supply. As for the value of ␦ 13 C, the species effect was not significant.…”

Section: Tablesupporting

confidence: 92%

The effects of water, nutrient availability and their interaction on the growth, morphology and physiology of two poplar species

Yin

Pang

Chen

2009

Environmental and Experimental Botany

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Section: Tablesupporting

confidence: 92%

The effects of water, nutrient availability and their interaction on the growth, morphology and physiology of two poplar species

Yin

Pang

Chen

2009

Environmental and Experimental Botany

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“…The positive effects of nutrients on plant growth under drought conditions can be explained by their physiological functions. For example, such positive effects of N and P are attributed to an increase in photosynthesis [15], stomatal conductance and water-use efficiency [11] and higher cell membrane stability and osmotic adjustment [16]. Nitrogen fertilization, particularly using nitrate [12], regulates water flux through plants by N-flux-linked signalling mechanisms [39][40][41].…”

Section: Discussionmentioning

confidence: 99%

“…Thus, nutrient supply strongly affects crop productivity under drought conditions, but this is also very complex [8][9][10]. The positive effects of N and P on plant growth under drought conditions are attributed to an increase in water-use efficiency, stomatal conductance [11][12][13][14], photosynthesis and ATPase activity [5,15], as well as higher cell membrane stability and improved osmotic adjustment [16,17]. However, K increases a plant s drought tolerance through its functions in…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Studer

Schmidhalter

2017

Agriculture

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Abstract:Global climate change is likely to increase the risk of frequent drought. Maize, as the principal global cereal, is particularly impacted by drought. Nutrient supply may improve plant drought tolerance for better plant establishment during seedling growth stages. Thus, this study investigated the interactive effects of drought and the application of the nutrients N, P and K either individually or in combination. The maize seedlings were harvested between 12 and 20 days after sowing, and the leaf area, shoot fresh and dry weight and root dry weight were determined, and shoot water content and root/shoot dry weight ratio were calculated. Among the N, P and K fertilization treatments applied individually or in combination, the results showed that there was generally a positive effect of combined NPK and/or NP nutrient supply on shoot growth such as leaf area, shoot fresh and dry weight at day 20 after sowing under both well-watered and drought conditions compared with no nutrient supply. Compared with the effect of N and P nutrient supply, it seems that K was not limiting to plant growth due to the mineralogical characteristics of the illitic-chloritic silt loam used, which provided sufficient K, even though soil tests showed a low K nutrient status. Interestingly, the root/shoot ratio remained high and constant under drought regardless of NPK application, while it decreased with NPK applications in the well-watered treatment. This suggests that the higher root/shoot ratios with N, NP, PK and NPK under drought could be exploited as a strategy for stress tolerance in crop plants.

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“…On the other hand, Dalal et al (1998), Singh and Sale (1998), Bruck et al (2000), and Angus et al (2001) reported increased water use and biomass production in response to enhanced plant nutrition. Bruck et al (2000) reported that pearl millet [(Pennisetum glaucum (L.)], a C 4 plant, had an increased shoot dry matter production in response to high water and phosphate supplies.…”

Section: Plant Nutritionmentioning

confidence: 99%

“…Bruck et al (2000) reported that pearl millet [(Pennisetum glaucum (L.)], a C 4 plant, had an increased shoot dry matter production in response to high water and phosphate supplies. Similar increases in water uptake and WUE with increasing dry matter production were reported by Singh and Sale (1998) for white clover, a C 3 plant, in response to increased water and phosphorus supply (also see Table 4).…”

Section: Plant Nutritionmentioning

confidence: 99%

Maximising the use of soil water by herbaceous species in the high rainfall zone of southern Australia: a review

Singh¹,

Bird²,

Saul³

2003

Aust. J. Agric. Res.

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Abstract. The planting of deep-rooted pasture species, herbaceous shrubs, and trees has been widely recommended to reduce deep drainage and recharge to the groundwater in the high rainfall zone (HRZ). However, in more recent years, the value of perennial pastures to reduce recharge has been questioned in areas with >600 mm annual rainfall. Currently, pastures dominated by annual species with relatively low productivity occur across much of the HRZ where deep drainage is most likely contributing to recharge. This review outlines our current understanding of water use by various herbaceous species, and indicates ways in which their water use may be increased in the HRZ of southern Australia.To reduce deep drainage in the HRZ, the soil water deficit must be increased prior to the opening autumn rains. This will allow a greater storage of water before any potential deep drainage occurs. There are two ways that this can be achieved with the use of herbaceous species. Firstly, change to or encourage species that use more water annually. Although plants with deeper root systems including lucerne have the ability to dry the soil to depth, a combination of winter-and summer-active species, rotational grazing, and pasture spelling would extend the active growing season and soil water use of annual and perennial species. A second option is to increase the productivity of the pasture, as there is a direct link between growth and water use. For example, improving pasture productivity by 50%, say from 8 to 12 t dry matter/ha, could use (transpire) approximately 160 mm more water annually by a C 3 species, irrespective of evaporation from the soil surface or evaporative demand factors. This is supported by strong correlations between plant dry mass and water use among a wide range of C 3 and C 4 plants of diverse growth form and habitat. This relationship appears to have been overlooked in recent studies of various components of the soil water balance model, possibly due to limited and unreliable estimates of evapotranspiration (ET). An improved relationship between 'estimated' ET and measured dry matter production should improve the capability of the soil water balance model to predict deep drainage, which is primarily dependent on the ET. Ways to increase pasture productivity and soil water use include regular applications of fertiliser and lime, and better management of waterlogged and acidic soils in the HRZ. Summer-active native species may also be useful on soils where the persistence of other deep-rooted perennials is poor; however, little is known about their productivity and persistence when heavily grazed.We believe that the relationship between water use and pasture production needs to be reassessed to improve the predictability of the soil water balance approach and recommend further research in both the field and under controlled conditions to determine the potential for increased water use in the HRZ of southern Australia by combinations of plant species and greater pasture productivity.A R 0 2 0 8 3 W a t e r u ...

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Effects of Phosphorus and Water Supply on Yield, Transpirational Water‐Use Efficiency, and Carbon Isotope Discrimination of Pearl Millet

Cited by 80 publications

References 31 publications

The effects of water, nutrient availability and their interaction on the growth, morphology and physiology of two poplar species

The effects of water, nutrient availability and their interaction on the growth, morphology and physiology of two poplar species

Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Maximising the use of soil water by herbaceous species in the high rainfall zone of southern Australia: a review

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