Salinity and waterlogging as constraints to saltland pasture production: A review

Bennett, Sarita Jane; Barrett-Lennard, E.G.; Colmer, Timothy D.

doi:10.1016/j.agee.2008.10.013

Cited by 149 publications

(110 citation statements)

References 79 publications

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“…This enables more soil resource uptake since water enters the soil profile predominantly from the soil surface in most ecosystems, and nutrient concentrations are commonly higher in the upper soil layers (Schenk, 2008). Most earlier studies focused on one-dimensional or root depth distribution (Bennett et al, 2009;Macinnis-Ng et al, 2010), 2 N concentration or soil properties (Zhou & Shangguan, 2007;February and Higgins, 2010;Gwenzi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The distribution of fine root length density for six artificial afforestation tree species in Loess Plateau of Northwest China

Jian

Fang

2015

For. syst.

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Aim of the study: Data about the distribution of fine root length density (FRLD) is important to understand the ecophysiology of vegetation. This is particularly true when models are applied to describe ecohydrology and vegetation function. However, there is yet limited knowledge of root distributions in semi－arid regions. The aim of this study is to investigate the distribution of fine roots for six typical afforestation tree species in Loess Plateau and its relationships with soil environmental factors.Area of study: Loess Plateau (NW of China).Material and methods: We quantified the fine root length density distribution of six typical afforestation tree species by soil core method, and the soil properties also were investigated.Main results: More than 50% of fine root length was concentrated at depths between 0 and 40 cm in vertical direction. In horizontal direction, most of fine roots concentrated near the trunk. Results showed a significant negative correlation between vertical distribution of FRLD and soil water content, a positive correlation between FRLD and organic matter and total N is significant, and a negative correlation with bulk density. No relationships were found with total C and particle size distribution in any soil layer for the six tree species. Stepwise multiple linear regression confirmed that changes in different soil properties significantly affected the variation in FRLD for each tree species, total N had strong and positive relationships with FRLD.Research highlights: These measurements provide valuable data for modelling of ecosystem water use and productivity.Keywords: Anjiapo catchment; Core method; Root distribution; Soil moisture; Soil properties.

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Section: Introductionmentioning

confidence: 99%

The distribution of fine root length density for six artificial afforestation tree species in Loess Plateau of Northwest China

Jian

Fang

2015

For. syst.

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“…As a result, there is increasing interest in the development of productive uses for salt-affected agricultural land (Rozema and Flowers, 2008;Bennett et al, 2009). Much research has concentrated on the development of salttolerant crop and pasture plants for human consumption or livestock production (Glenn et al, 1991;Rogers et al 2005;Al-Shorepy et al, 2010;Norman et al, 2012;Pearlstein et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

Lymbery

Kay

Doupé

et al. 2013

Science of The Total Environment

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Dryland salinity is a major problem affecting food production from agricultural land in Australia and throughout the world. Although there is much interest in using saline groundwater to grow marine fish on salt-affected farmland, the disposal of nutrient enriched, saline aquaculture effluent is a major environmental problem. We investigated the potential of the salt-tolerant NyPa Forage plant (Distichlis spicata L. Greene var. yensen-4a) to trap nutrients from saline aquaculture effluent and subsequently to provide a fodder crop for livestock. Sub-surface flow wetlands containing NyPa Forage were constructed and their efficacy in removing total nitrogen, ammonia, nitrite/nitrate, total phosphorus and orthophosphate was monitored under different levels of nutrients and salinity. The wetlands removed 60 -90% of total nitrogen loads and at least 85% of ammonia, nitrite/nitrate, total phosphorus and orthophosphate loads, with greater efficiency at high nutrient and low salinity levels. The above-ground yield, sodium, crude protein (CP) and in vitro dry matter digestibility (DMD) of NyPa Forage plants were measured after fertilisation with different nutrient levels and cropping at different frequencies. Yield of plants increased with increased nutrient, while nutritive value was greater when nutrients were applied but did not differ among nutrient levels. Yield was not affected by cropping frequency, but nutritive value was greatest when plants were cropped at intervals of 21 or 42 days. At optimum nutrient addition and cropping levels, the plants had a mean CP content of 16.7 % and an in vitro DMD of 67.6 %, equivalent to an energy value of 9.5 MJ kg -1 . Assuming an equivalent fibre content and voluntary food intake as grass hay, and no accumulation of other toxic minerals, these nutritive values would be sufficient for maintenance or moderate liveweight gains in dry adult sheep or cattle. Keywords:salinity; inland saline aquaculture; effluent; constructed wetlands; saltland pasture; agri-aquaculture 3 IntroductionSecondary salinisation, in which human activities lead to high concentrations of ions (principally sodium and chloride) in the landscape, is a major environmental problem affecting freshwater and soil in many arid and semi-arid areas of the world (Ghassemi et al., 1995;Rozema and Flowers, 2008). Secondary salinisation occurs because of rising water tables, as a result of irrigation (irrigation salinity) or land clearing (dryland salinity). It is a particular problem in economically less-developed countries (e.g. India, Tunisia, Morocco, Peru and Bolivia) although more-developed regions, such as Australia, may also be badly affected (Rozema and Flowers, 2008). In Australia, the widespread clearing of native vegetation has resulted in approximately 5.7 M ha of agricultural land being adversely affected by dryland salinity, and this figure may grow to 17 M ha by 2050 (National Land and Water Resources Audit, 2001).The salinisation of agricultural land in arid regions is largely irreversible because ...

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“…O uso dos solos degradados pela salinização na agricultura não pode ser negligenciado sendo necessário desenvolver técnicas ambiental e economicamente viáveis para sua remediação possibilitando seu retorno ao uso agrícola produtivo (Qadir et al, 2007;Bennett et al, 2009).Diante da necessidade de produção agrícola e dos altos investimentos exigidos pelo processo convencional de recuperação, a fitorremediação surge como uma alternativa de baixo custo para recuperação de solos salinos, não agressiva ao ambiente, podendo propiciar a reabilitação de tais solos (Leal et al, 2008). A Atriplex nummularia Lindl.…”

Section: Introductionunclassified

Dinâmica de íons em solo salino-sódico sob fitorremediação com Atriplex nummularia e aplicação de gesso

Santos

Freire

Almeida

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMODesenvolveu-se este trabalho em um Cambissolo salino sódico do Perímetro Irrigado Cachoeira II, Serra Talhada, PE, com o objetivo de avaliar a dinâmica de cátions e ânions básicos em um solo salino sódico submetido a fitorremediação com Atriplex nummularia e correção com aplicação de gesso. Realizaram-se amostragens semestrais com quatro coletas de solo (0, 6, 12 e 18 meses). O delineamento experimental utilizado foi de blocos ao acaso avaliando-se quatro tratamentos: controle (sem nenhum manejo do solo), correção química com gesso (sem cultivo) e dois com cultivo de Atriplex nummularia Lindl (espaçamentos 1 x 1 m e 2 x 2 m), com quatro repetições. Os resultados das análises do solo revelaram a contribuição da aplicação de gesso, especialmente do cultivo de plantas de atriplex na redução dos teores de sais no solo.Palavras-chave: solos afetados por sais, erva-sal, corretivo químico Dynamics of ions in saline-sodic soil under phytoremediation with Atriplex nummularia and gypsum applications ABSTRACT The study was conducted in a saline-sodic Inceptisol from the Cachoeira II Irrigation Perimeter, Serra Talhada (PE), with the objective of evaluating the dynamics of basic cations and anions in a saline-sodic soil subjected to phytoremediation with Atriplex nummularia and correction with application of gypsum. Samples were taken every six months, at four times (0, 6, 12 and 18 months). The experimental design was in randomized blocks, the four treatments evaluated were: control (without any management practice), chemical correction with gypsum (no crop) and two Atriplex nummularia cultivation (1 x 1 m and 2 x 2 m plant spacing), with four replications. The results of soil analysis revealed the contribution of gypsum application and especially the cultivation of Atriplex plants in reducing the levels of salts in the soil.

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Salinity and waterlogging as constraints to saltland pasture production: A review

Cited by 149 publications

References 79 publications

The distribution of fine root length density for six artificial afforestation tree species in Loess Plateau of Northwest China

The distribution of fine root length density for six artificial afforestation tree species in Loess Plateau of Northwest China

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

Dinâmica de íons em solo salino-sódico sob fitorremediação com Atriplex nummularia e aplicação de gesso

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