Estimation of water consumption and crop water productivity of winter wheat in North China Plain using remote sensing technology

Li, Hongjun; Zheng, Li; Lei, Yuping; Li, Chunqiang; Liu, Zhijun; Zhang, Shengwei

doi:10.1016/j.agwat.2008.05.003

Cited by 110 publications

(64 citation statements)

References 10 publications

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“…This result was consistent with previous studies [9,17]. NDVI measurement has been applied to diagnose nutrient (particularly N) status during the growth and development of many crops, including rice and wheat [18,19]. Also, one study found that yield could be predicted by NDVI measured at key stages [20].…”

Section: Discussionsupporting

confidence: 80%

Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages

Liu¹,

Li²,

Hu³

2014

Front. Agr. Sci. Eng.

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The effect of the urease inhibitor, N-(n-butyl) thiophosphoric triamide (NBPT) at a range of application rates on rice production was examined in a field experiment at Jinxian County, Jiangxi Province, China. The normalized difference vegetation index (NDVI) was measured at key growth stages in both early and late rice. The results showed that the grain yield increased significantly when urea was applied with NBPT, with the highest yield observed at 1.00% NBPT (wt/wt). NDVI differed with the growth stage of rice; it remained steady from the heading to the filling stage. Rice yield could be predicted from the NDVI taken at key rice growing stages, with R 2 ranging from 0.34 to 0.69 in early rice and 0.49 to 0.70 in late rice. The validation test showed that RMSE (t$hm -2 ) values were 0.77 and 0.87 in early and late rice, respectively. Therefore, it was feasible to estimate rice yield for different amounts of urease inhibitor using NDVI.

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Section: Discussionsupporting

confidence: 80%

Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages

Liu¹,

Li²,

Hu³

2014

Front. Agr. Sci. Eng.

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“…Estes estudos podem ser realizados através da determinação da evapotranspiração, da biomassa e da produtividade da água da bacia. Estes parâmetros podem ser determinados com precisão a partir de métodos indiretos, os quais estão baseados em medidas radiométricas obtidas a partir de sensores remotos (Allen et al, 2007, Bezerra et al, 2008, Li et al, 2008. Desta forma, tendo em vista o cenário de fragilidade hídrica e a carência de informações técnicas que possam subsidiar o planejamento do uso adequado da água, este trabalho teve por objetivo estimar a evapotranspiração, a biomassa e a produtividade da água da microbacia do córrego da Mula através do sensoriamento remoto.…”

Section: Introductionunclassified

Estacionalidade Da Evapotranspiração E Produtividade Da Água Na Microbacia Do Córrego Da Mula Em Santa Fé Do Sul – Sp

Nuñez

Hernández

Teixeira

2015

RBAI

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RESUMOA microbacia do córrego da Mula se apresenta como um sócio-ecossistema sensível, com talvegues assoreados, ausência de matas ciliares e nascentes desprotegidas. A capacidade de gerar e armazenar água pela microbacia é excedida pela demanda em períodos de seca, agravando-se em secas prolongadas. Sendo assim necessário avaliar o comportamento da água acima do solo na microbacia, realizado nas épocas seca e úmida dos anos 2013 e 2014.

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“…Problems are more serious in the northern part of the NCP, in which there is less natural precipitation; the groundwater table at the Luancheng Agricultural Ecosystem Experiment Station has decreased by more than 20 m within about 30 years (Chen et al, 2003;Hu and Cheng, 2011), and the groundwater depression cones in Beijing, Shijiazhuang and Cangzhou continue to expand (Jiang and Zhang, 2004;Sun et al, 2011). Of the agricultural crops in the NCP, winter wheat plays a key role in the development of severe water scarcity and in the over-exploitation of groundwater, because more than 70% of irrigation water (blue water) is consumed by winter wheat (Li et al, , 2008Sun et al, 2010). Recent studies have found large, spatially continuous areas in the northern part of the NCP in which winter wheat and summer maize are being replaced by spring crops; this has been termed "the spring corn planting belt phenomenon" (Feng et al, 2007;Huang et al, 2012;Wang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Impact of the changing area sown to winter wheat on crop water footprint in the North China Plain

Wang

Fischer

et al. 2015

Ecological Indicators

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a b s t r a c tThe serious water scarcity and groundwater over-exploitation problems of the North China Plain (NCP) have aroused worldwide concerns. Achieving a reduction in agricultural water use is critical, because agriculture is the largest water consumer in the NCP. New solutions to these problems may lie in changes in the area sown to winter wheat across the NCP. In this study, the water footprint (WF) was applied as an aggregative indicator to evaluate the impact of the changing area sown to winter wheat. A Chinese version of the AEZ model, the China-AEZ model, was used for the evaluation. The results showed: (1) Green water plays a more significant role in winter wheat production in the southern part of the NCP than in the north; about a half of the water requirements for winter wheat are met by green water in the southern part of the NCP, compared to only a third in the north. (2) As a result of the north-south shift in the area sown to winter wheat during the period 1998-2011, the WF, the green water footprint (WF green ) and the surface water footprint (WF s blue ) for winter wheat increased, respectively, by 459 × 10 6 m 3 yr −1

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Estimation of water consumption and crop water productivity of winter wheat in North China Plain using remote sensing technology

Cited by 110 publications

References 10 publications

Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages

Estimating the effect of urease inhibitor on rice yield based on NDVI at key growth stages

Estacionalidade Da Evapotranspiração E Produtividade Da Água Na Microbacia Do Córrego Da Mula Em Santa Fé Do Sul – Sp

Impact of the changing area sown to winter wheat on crop water footprint in the North China Plain

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