Effect of irrigation and nitrogen on yield and yield components of two rapeseed cultivars

Jaloud, A. A.; Hussian, G; Karimulla, Shaik; Hamidi, A.

doi:10.1016/0378-3774(95)01207-9

Cited by 21 publications

(8 citation statements)

References 12 publications

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“…Cultivation of short-duration and less waterdemanding crops is important not only to improve the economy but also to utilize the available land and water resources more effectively. Oilseed crops can be grown under a wide range of soil, water and climatic conditions (Al-Jaloud et al 1996). Providing the optimum water supply to crops has a direct impact on crop yield and may also improve fertilizer efficiency (Meinke et al 1997;Banedjschafie et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Optimizing water, nitrogen and crop density in canola cultivation using response surface methodology and central composite design

Koocheki

Mahallati

Moradi

et al. 2014

Soil Science and Plant Nutrition

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Optimisation of water and nitrogen use is an effective management tool to conserve resources and reduce environmental pollutions. Response surface methodology (RSM) is defined as a collection of mathematical and statistical methods that are used to develop, to improve or to optimize a product or process. In order to determine optimum levels of water, nitrogen and planting density of canola (Brassica napus L.), a 2-year experiment (2010-2011) was carried out by central composite design as RSM at the research station of Ferdowsi University of Mashhad. The treatments were designed based on low and high levels of irrigation (1500 and 4000 m 3 ha −1 ), nitrogen (0 and 400 kg N ha −1 ) and density (50 and 150 plant m −2 ) as independent variables. Furthermore, seed yield, nitrogen losses, nitrogen use efficiency (NUE) and water use efficiency (WUE) were measured as response variables in a full quadratic polynomial model. Optimum levels of irrigation, nitrogen and planting density were suggested to achieve the target range of dependent variables based on three scenarios: economic, environmental and eco-environmental. The results showed that increasing irrigation and fertilizer led to an increase in seed yield and nitrogen losses, whereas increasing canola density resulted in an increase in seed yield but a decrease in nitrogen losses. The optimum levels of water, fertilizer and density based on environmental scenario were 1802 m 3 ha −1 , 11 kg N ha −1 and 122 plant m −2 , respectively. To achieve optimum conditions under the economic scenario, it is necessary to use 3411 m 3 water ha −1 , 178 kg N ha −1 and 119 plant m −2 . Amounts of 2347 m 3 water ha −1 , 92 kg N ha −1 and 114 plant m −2 were found to be the optimum conditions for the eco-environmental scenario. In general, it seems that resource use based on the eco-environmental scenario may be the most favorable cropping strategy for canola production.

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Section: Introductionmentioning

confidence: 99%

Optimizing water, nitrogen and crop density in canola cultivation using response surface methodology and central composite design

Koocheki

Mahallati

Moradi

et al. 2014

Soil Science and Plant Nutrition

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“…Canola seed yield and seed oil content generally increase with the amount of water received (Al‐Jaloud et al, 1996; Canola Council of Canada, 2008a). Although canola is commonly grown in most parts of the world under rain‐fed farming systems, production of canola under irrigation has been a common practice in some parts of the world, such as Australia since 1970 (McCaffery, 2004) and the cooler, drier parts of Montana (Bauder, 2006).…”

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confidence: 99%

Water Stress Effects on Winter Canola Growth and Yield

2010

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Canola (Brassica napus L.) is seen as a dryland crop in many parts of the world. In South Africa, there is growing interest in producing canola under irrigation because of its profitability and beneficial disease control characteristics in a rotation system. The objectives of this study were to identify the growth stage most sensitive to water stress and to determine the effect of water stress on crop growth, phenology, seed and oil yield, water use, and seed oil content. A well watered control was compared with treatments stressed during one of the following stages: vegetative, flowering, or seed filling in replicated field studies during 2002 and 2003 at Pretoria, South Africa. Water stress imposed during flowering delayed maturity by 114 growing degree days. In contrast, water stress imposed during seed fill resulted in 127 growing degree days earlier maturity. The well watered control gave the highest value for leaf area index of 8, water use of 709 mm, seed yield of 3831 kg ha−1, and seed oil content of 398 g kg−1 Canola stressed at flowering gave the lowest values for seed yield of 1361 kg ha−1, seed oil content of 340 g kg−1, and water use of 332 mm. Dry matter production per unit water use at seed filling was only a third of its value during the vegetative and flowering stages. Canola seed and oil yield are most sensitive to water stress at flowering and less sensitive during the vegetative and seed‐filling stages.

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“…It can be grown under a wide variety of soil, water and climatic conditions (Al-Jaloud et al 1996). Many aspects of plant physiological and morphological characteristics and productivity of oilseed rape have been studied under different irrigation, fertilizer and field management (Mandal et al 2006;Rathke and Diepenbrock, 2006;Buttar et al 2006), including water stress (Jensen et al 1996;Mogensen et al 1997;Maisiri et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Root foraging and yield components underlying limited effects of Partial Root-zone Drying on oilseed rape, a crop with an indeterminate growth habit

et al. 2009

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We report on two experiments with oilseed rape (Brassica napus L.) to test if partial root-zone drying techniques improve yield in a crop in which vegetative and reproductive growth overlap (indeterminate growth habit), and to investigate what plant morphological responses contribute to the yield that is realized. Deficit irrigation resulted in smaller plants with smaller yields but larger seeds compared to treatments with shallow groundwater (first experiment) and with fully watered conditions (second experiment). Different partial root-zone drying treatments (water supply patterns) under deficit irrigation, however, had little effect on plant growth and yield components (number of branches, branch lengths, number of pods, etc.). Our results suggest that partial root-zone drying doesn't work well with oilseed rape. Detailed measurements of soil water contents and root distribution indicate that roots were extremely plastic, effectively foraging for water, and these root responses may have overwhelmed physiological effects of partial root drying on the shoot. Furthermore, in crops with indeterminate growth with a short vegetative growth phase, partial root-zone drying may be ineffective in enhancing the major yield components. Further reasons for the lack of success are discussed.

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Effect of irrigation and nitrogen on yield and yield components of two rapeseed cultivars

Cited by 21 publications

References 12 publications

Optimizing water, nitrogen and crop density in canola cultivation using response surface methodology and central composite design

Optimizing water, nitrogen and crop density in canola cultivation using response surface methodology and central composite design

Water Stress Effects on Winter Canola Growth and Yield

Root foraging and yield components underlying limited effects of Partial Root-zone Drying on oilseed rape, a crop with an indeterminate growth habit

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