Water and nutrient dynamics and tree growth

Sands, R.; Mulligan, D. R.

doi:10.1016/0378-1127(90)90129-y

Cited by 102 publications

(56 citation statements)

References 57 publications

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“…Fertilization is most effective when trees are not water-stressed, and irrigation is most effecttive when nutrients are not scarce (Sands and Mulligan, 1990). Therefore, understanding the mechanisms of plant tolerance to water and nutrient stress is a crucial environmental research topic (Wang et al, 2009a).…”

Section: Introductionmentioning

confidence: 99%

Growth and physiological responses to water and nutrient stress in oil palm

Sun¹,

Cao²,

Shao³

et al. 2011

Afr. J. Biotechnol.

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The research was conducted to detect changes in growth, physiology and nutrient concentration in response to two watering regimes (well-watered and water-stress conditions) and to two nutrient regimes (with or without fertilization) of oil palm. Under stress conditions, changes in plant growth, dry matter allocation, relative water content, leaf relative conductivity, leaf N, P and K concentration are usually observed. These characteristics and related parameters were determined and the experiment results are listed as follows: (1) fertilization promoted the growth of oil palm under well-watered conditions, while under water stress conditions its effects on growth was negative. The ratio of root/shoot was increased under water stress condition; (2) relative water content and chlorophyll a/b content were gradually decreased while leaf relative conductivity was increased quickly under water and nutrient stress conditions during the experiment. It is obvious that water stress had a greater influence than nutrient stress on these parameters; (3) water and nutrient stress decreased leaf nitrogen and phosphorus concentration but increased potassium concentration; the combination of water and nutrient stress made significant effects on nitrogen and phosphorus concentration, but no significant effects on potassium concentration. Moreover, deficiency of both water and nutrients in combination had the greatest impact on changes in these traits of oil palm.

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Section: Introductionmentioning

confidence: 99%

Growth and physiological responses to water and nutrient stress in oil palm

Sun¹,

Cao²,

Shao³

et al. 2011

Afr. J. Biotechnol.

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“…A eficiência das adubações é maior quando as plantas não encontram-se sob deficit hídrico (Sands & Mulligan, 1990); por sua vez, a irrigação é mais efetiva quando não há limitação nutricional no meio de cultivo. Quanto ao efeito dos atributos físicos, os que estão diretamente ligados à retenção de água no solo estiveram mais fortemente associados à produtividade do arroz.…”

Section: Resultsunclassified

Produtividade de arroz irrigado por aspersão em terras baixas em função da disponibilidade de água e de atributos do solo

Pinto

Parfitt

Timm

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar a influência da tensão de água e de atributos físicos e químicos do solo sobre a produtividade do arroz irrigado por aspersão, em terras baixas no Rio Grande do Sul. Na safra 2011/2012, foram avaliados os efeitos das tensões de água no solo de 20 e 40 kPa, durante todo o ciclo da cultura, bem como as de 40 e 20 kPa nas fases vegetativa e reprodutiva, respectivamente. Na safra 2012/2013, foram avaliadas as tensões de 10, 20 e 40 kPa, durante todo o ciclo da cultura, e as de 40 e 10 kPa nas fases vegetativa e reprodutiva, respectivamente. Em ambas as safras, utilizou-se a cultivar de arroz irrigado BRS Pampa. O gasto com água na irrigação por aspersão representou 48% do gasto com a irrigação por inundação. A produtividade do arroz correlacionou-se positivamente com a microporosidade e com os teores de fósforo e potássio disponíveis no solo; e negativamente com a macroporosidade e a saturação por alumínio. A avaliação conjunta da tensão de água e de atributos físicos e químicos do solo permite avaliar com mais propriedade a variabilidade na produtividade de arroz irrigado por aspersão em terras baixas no Rio Grande do Sul. A irrigação por aspersão possibilita melhor uso da água proveniente da precipitação pluvial, com efeitos positivos sobre a economia de água.Termos para indexação: Oryza sativa, economia de água, fertilidade do solo, física do solo, porosidade do solo, tensão de água no solo. Sprinkler-irrigated rice yield in lowlands as a function of water availability and soil attributesAbstract -The objective of this work was to determine the effect of soil water tension and physicochemical soil attributes on sprinkler-irrigated rice yield in lowlands of the state of Rio Grande do Sul, Brazil. In the 2011/2012 crop season, the effects of 20 and 40 kPa soil water tensions throughout the crop cycle were evaluated, as well as of 40 and 20 kPa during the vegetative and reproductive phases, respectively. In the 2012/2013 crop season, soil water tensions of 10, 20, and 40 kPa were evaluated throughout the entire crop cycle, and the tensions of 40 and 10 kPa were evaluated during the vegetative and reproductive phases, respectively. In both crop seasons, the irrigated rice cultivar BRS Pampa was used. Water costs with sprinkler irrigation represented 48% of that with flood irrigation. Rice yield was positively correlated with soil microporosity and phosphorus and potassium availability; and negatively correlated with macroporosity and aluminum saturation. The joint evaluation of soil water tension and soil physicochemical attributes allow a better evaluation of the variability of sprinkler-irrigated rice yield in the lowland areas of the state of Rio Grande do Sul. Sprinkler irrigation allows better use of rainwater, revealing positive effects on water economy.

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“…by a diminution in nutrient availability) which may have elicited an increased soil exploration by fine roots (Norby and Iversen 2006;Smith et al 2013a). Extensive root systems exploring large volumes of soils are associated with the plant ability to capture less mobile elements, such as P, but not necessarily with more mobile nutrients, such as N (Sands and Mulligan 1990). In addition, the allocation of resources to the root system is not necessarily associated with a benefited nutrition and it might exacerbate the limitation of nutrients by enhancing the sink effect of other compartments, such as ectomycorrhizas and mycelia (Cudlin et al 2007).…”

Section: Effect Of Co 2 and Admixture On Nutrient Relationsmentioning

confidence: 99%

Response of Fagus sylvatica and Picea abies to the interactive effect of neighbor identity and enhanced CO2 levels

Rolo

Andivia

Pokorný

2015

Trees

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Enhanced levels of CO 2 affected both the nutrition and morphology of both species. The effect of interspecific competition was dependent on the species identity but not on the CO 2 level. AbstractThe interest in adaptive forest strategies to overcome predicted scenarios of climate change is increasing worldwide. An example of these strategies is the introduction of native species into mono-specific plantations. However, to fully consider this option/strategy, a higher understanding of the responses of forest tree species to concurrent biotic and abiotic factors is needed. The aim of the present study was to assess nutritional and morphological adjustments of individuals of European beech (Fagus sylvatica L.) and Norway Spruce (Picea abies (L.) Karst) growing at enhanced levels of CO 2 and with different proportions of con-specific individuals in its vicinity.Individuals that grew at elevated CO 2 levels showed higher values of relative growth rate (RGR), total twig dry biomass and root biomass, and lower values of leaf area ratio, leaf N and Mg concentrations and soil nutrient concentrations. Individuals of Norway spruce growing in the vicinity of high proportions of European beech showed a reduction in the allocation of biomass to foliar tissue and lower values of RGR and root biomass. European beech, by contrast, showed a limited response to Norway spruce presence and higher capacity in the exploitation of space both above-and belowground. In conclusion, the lower response of European beech to both environmental factors suggests that the introduction of European beech into Norway spruce stands could be a feasible option in current forest transition strategies.

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Water and nutrient dynamics and tree growth

Cited by 102 publications

References 57 publications

Growth and physiological responses to water and nutrient stress in oil palm

Growth and physiological responses to water and nutrient stress in oil palm

Produtividade de arroz irrigado por aspersão em terras baixas em função da disponibilidade de água e de atributos do solo

Response of Fagus sylvatica and Picea abies to the interactive effect of neighbor identity and enhanced CO2 levels

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