Integrated effect of transplanting date, cultivar and irrigation on yield, water saving and water productivity of rice (Oryza sativa L.) in Indian Punjab: Field and simulation study

Jalota, S.K.; Singh, Kulvir; Chahal, G.B.S.; Gupta, Rajeev Kumar; Chakraborty, Somsubhra; Sood, Anil K.; Ray, S. S.; Panigrahy, Sushma

doi:10.1016/j.agwat.2009.02.005

Cited by 62 publications

(38 citation statements)

References 20 publications

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“…This simple method of estimating the transplanting date can be useful because the acquisition of accurate information from farmers is often difficult. The transplanting date is occasionally closely related to the dry matter production of rice (Homma et al, 2007;Jalota et al, 2009), although the relation was not significant in this study (R 2 = 0.04).…”

Section: Discussioncontrasting

confidence: 41%

Evaluation of the dynamics of the leaf area index (LAI) of rice in farmer's fields in Vientiane Province, Lao PDR

Hirooka

Homma

Maki

et al. 2017

J. Agric. Meteorol.

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Rice is the most important crop in Lao People's Democratic Republic (Lao PDR). The improvement of its productivity is strongly recommended, but information about its growth characteristics in farmers' fields is limited. This study evaluated the dynamics of the leaf area index (LAI) and analyzed the relationship between the rice productivity and soil in farmers' fields in Vientiane province, Lao PDR. Because the LAI in the farmers' fields increased almost linearly, a straight-line regression was used for the analysis. The rice yield in the farmers' fields ranged from 63.8 g m -2 to 411.8 g m -2 and correlated with the LAI during the later growth stage. The variability in the LAI was explained by the LAI growth rate but rarely by the effective accumulated temperatures from the estimated transplanting date. The LAI growth rate was associated with the nitrogen and carbon content in the soil. These results suggest that the rice productivity in farmers' fields is governed by the soil fertility through LAI growth, and that LAI monitoring is an effective tool to evaluate the production.

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Section: Discussioncontrasting

confidence: 41%

Evaluation of the dynamics of the leaf area index (LAI) of rice in farmer's fields in Vientiane Province, Lao PDR

Hirooka

Homma

Maki

et al. 2017

J. Agric. Meteorol.

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“…In the intervening years, many authors have compared estimates of water productivity across time, location, and cultivars, partly with the goal of identifying opportunities for increasing agricultural production through improvements in water management (Zwart and Bastiaanssen 2004;Jalota et al 2009;Mahajan et al 2009;Faramarzi et al 2010;Brar et al 2012;Alauddin and Sharma 2013;Alauddin et al 2014;Silva et al 2014;Yadvinder-Singh et al 2014). Many of the authors report differences in calculated values of water productivity, yet often little intuition is provided regarding likely causes of the observed differences.…”

Section: Introductionmentioning

confidence: 99%

Water productivity and food security: considering more carefully the farm-level perspective

Wichelns¹

2015

Food Sec.

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With the increasing demands on water resources in many areas, many authors are calling for increases in water productivity in agriculture to ensure sufficient food production in the future. While compelling at first glance, the notion of increasing water productivity is not supported by an underlying economic rationale and is not necessarily consistent with the goals of individual farmers regarding net revenue or subsistence production. Water productivity, as defined in the literature, is a ratio describing the average amount of output or value associated with the amount of water applied or transpired in crop production. As such, the ratio is not a sufficient indicator of economic efficiency and cannot be relied on to determine desirable adjustments in regional water allocations or in farm-level irrigation strategies. I describe the shortcomings of water productivity as an indicator of optimal water use, with a focus on farm-level decisions regarding crop production and irrigation. I note also the importance of considering more carefully the full set of inputs that contribute to crop production, and the risk and uncertainty that influence farmlevel decisions. Water productivity does not address these inherent characteristics of agricultural production, which must be considered when evaluating policies and investments to enhance rural livelihoods and ensure food security.

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“…Estratégias visando à maior efi ciência de água em arroz estão sendo estudadas em diversas partes do mundo por diversos pesquisadores (TOESCHER et al, 1997;BOUMAN & TUONG, 2000;MACHADO et al, 2006;AHMAD et al, 2008;JALOTA et al, 2009;MAHAJAN et al, 2009;YAO et al, 2012). Entre as estratégias, está o uso de diferentes sistemas de irrigação (contínuo e intermitente), densidades de plantas, cultivares de diferentes ciclos (curto, médio e tardio), híbridas e convencionais, diferentes momentos de supressão da irrigação e épocas de semeadura do arroz.…”

Section: Introductionunclassified

Rendimento de grãos e eficiência no uso de água de arroz irrigado em função da época de semeadura

et al. 2013

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Integrated effect of transplanting date, cultivar and irrigation on yield, water saving and water productivity of rice (Oryza sativa L.) in Indian Punjab: Field and simulation study

Cited by 62 publications

References 20 publications

Evaluation of the dynamics of the leaf area index (LAI) of rice in farmer's fields in Vientiane Province, Lao PDR

Evaluation of the dynamics of the leaf area index (LAI) of rice in farmer's fields in Vientiane Province, Lao PDR

Water productivity and food security: considering more carefully the farm-level perspective

Rendimento de grãos e eficiência no uso de água de arroz irrigado em função da época de semeadura

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