Which crop and which drop, and the scope for improvement of water productivity

Bessembinder, Janette; Leffelaar, P.A.; Dhindwal, A. S.; Ponsioen, Tommie

doi:10.1016/j.agwat.2004.10.004

Cited by 76 publications

(33 citation statements)

References 17 publications

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“…While water shortage is an increasing problem in many parts of the world (Wallace 2000;Zhou and Tol 2004;Bessembinder et al 2005), inefficient use of fertilizer can cause a serious non-point source pollution to ground water and other surface water bodies (Kellogg et al 1994;Lehrsch et al 2000). Agronomic strategies are required that lead to co-optimal utilization of both water and nutrition.…”

mentioning

confidence: 99%

Combined effects of partial root drying and patchy fertilizer placement on nutrient acquisition and growth of oilseed rape

2007

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Partial rootzone drying (PRD) is widely investigated as an effective irrigation technique, resulting in higher water use efficiency and yield for plants growing under mild water deficit. Nutrition is another important factor affecting plant yield, but nutrient acquisition has only rarely been considered in conjunction with PRD. Here we investigate the interaction between water and fertilizer supply in a pot experiment with oilseed rape (Brassica napus L.). Eight treatments were set up for the experiment, a factorial combination of four watering regimes (100% control watering at both sides of the plants; 50% control watering at both sides of the plants; 50% fixed watering applied only to one side of the plants; 50% alternate watering applied alternately to both sides of the plant) and two fertilizer placement levels (uniform over the entire pot, and patchy supplied to one side). For the 50% watering treatments, the total amount of water supplied to the plants was the same, only the pattern of application differed between treatments. Also the total fertilizer applied was the same for all treatments. Oilseed rape roots foraged effectively for water and nutrients resulting in relatively small differences in nutrient uptake and above-ground growth among the water-deficit treatments. Placing fertilizer at one side of the plants increased nutrient uptake, but there were differences between the water treatments and interactions with water uptake. Alternate watering resulted in the highest growth, as a result of the largest nitrogen and phosphorus uptake with the smallest root investment among the three water deficit treatments. Fixed watering resulted in poorest performance when fertilizer was uniformly spread throughout the pot, because the plants were unable to acquire the nutrients on the dry side. Our results show that PRD can be well combined with patchy fertilizer supply, but that reduced nutrient uptake may be expected when nutrients are supplied in parts of the soil volume that remain too dry.

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confidence: 99%

Combined effects of partial root drying and patchy fertilizer placement on nutrient acquisition and growth of oilseed rape

2007

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“…The focus of such research is to use the least amount of water to produce the greatest amount of food, which is essential for reducing the extent of agricultural water shortages, easing the pressure on the environment and ensuring food security (Bessembinder et al 2005;Xu et al 2008). With the advancement of such studies, an increasing number of scholars have conducted substantial improvements to research methods that have been widely applied to agricultural water resources systems, such as the use of genetic algorithms in complex systems (Zhao 2003;Fu et al 2012), systems dynamics (Gies et al 2014), set pair analyses (Guo et al 2014) and control theory (Fu et al 2013).…”

Section: Introductionmentioning

confidence: 98%

Regional food security risk assessment under the coordinated development of water resources

Cheng

et al. 2015

Nat Hazards

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Agricultural water use plays an important role in maintaining food security. The present paper utilizes an agent-based model of the complex adaptive systems (CAS) theory for the dynamic simulation of four water resource utilization plans and was able to forecast the per capita food share, per capita income and water security rate under three climatic conditions in Heilongjiang Province, China, in 2020. The forecasts were performed under the broad principle of coordinated regional development and based on Heilongjiang's food production, water resources and population data 2003-2010. The measured data for Heilongjiang Province in 2011 were used to perform joint risk analyses of the forecast results. The results showed that the comprehensive plan combining technological innovation and policy control provides the best method of achieving food security under the three climatic conditions. However, compared to maintaining the status quo, this combination plan decreases by approximately 8 % under the three climatic conditions, but the per capita share of food and the rate of water security increase to over 10 and 20 %, respectively. Therefore, to further reduce the pressure on water resources in Heilongjiang Province and to lessen the impact of climate on food production, advanced technology and policy regulations should be increasingly integrated into various industries to ensure the sustainable supply of regional water resources for food production.

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“…The ratio of harvestable product and evapotranspiration is one of the most widely used definitions of WP. Bessembinder et al (2005) show a number of factors which may affect these WP values by 10 -25%:…”

Section: Introductionmentioning

confidence: 99%

Assessing Options to Increase Water Productivity in Irrigated River Basins Using Remote Sensing and Modelling Tools

Dam

Singh

Bessembinder

et al. 2006

International Journal of Water Resources Development

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Which crop and which drop, and the scope for improvement of water productivity

Cited by 76 publications

References 17 publications

Combined effects of partial root drying and patchy fertilizer placement on nutrient acquisition and growth of oilseed rape

Combined effects of partial root drying and patchy fertilizer placement on nutrient acquisition and growth of oilseed rape

Regional food security risk assessment under the coordinated development of water resources

Assessing Options to Increase Water Productivity in Irrigated River Basins Using Remote Sensing and Modelling Tools

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