Chlorophyll Dynamics in Rice (<i>Oryza sativa</i>) Before and After Flowering Based on SPAD (Chlorophyll) Meter Monitoring and its Relation with Grain Yield

Ramesh, K.; Chandrasekaran, B.; Balasubramanian, T. N.; Bangarusamy, U.; Sivasamy, R.; Sankaran, N.

doi:10.1046/j.1439-037x.2002.00532.x

Cited by 65 publications

(36 citation statements)

References 4 publications

(2 reference statements)

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“…O valor crítico estimado do índice SPAD ao longo do ciclo está abaixo do encontrado, 70,6, por Westerveld et al (2004), que foi determinado no estádio de início do aparecimento das cabeças do cultivar Atlantis. Os valores de níveis críticos com o medidor portátil SPAD-502 são variáveis, precisando ser ajustados para cada situação, como deficiência de nutrientes e condições ambientais (Spaner et al, 2005), variedade (Hoel, 2003) e estádio de crescimento da cultura (Ramesh et al, 2002).…”

Section: Resultsunclassified

Evolução das características da planta associadas à nutrição nitrogenada de repolho

Moreira

Vidigal²

2011

Rev. Ceres

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Plant parameters associated with adequate nutritional nitrogen status of cabbageCorrect management of cabbage fertilization can be achieved by synchronizing the plant demand with N supply during the crop cycle. The objective of this study was to evaluate the evolution of nutritional parameters intensity of green color (SPAD index) taken on the fourth fully expanded leaf, N content, stem length, number of leaves, and fresh and dry matter weights to diagnose nitrogen status of cabbage and determine the critical value of each parameter at different assessment times. At 50, 64 and 78 days after sowing, the intensity of green color (SPAD index) measured on the fourth leaf, stem length, number of leaves, fresh and dry matter weights and N content in the leaf dry matter were determined. Five N rates (0, 75, 150, 300 and 450 kg ha -1 ) were evaluated. Treatments were arranged in a randomized block design with four replications. Last harvest of cabbage heads was at 103 days after sowing. Optimal values of variables over cabbage cycle depended on N rates and time of evaluation. Optimal SPAD values were 60.8, 58.4 and 53.5 at 50, 64 and 78 days after sowing respectively. Optimal values of N content were 62.9, 60.3 and 59.0 in the leaves, 48.6, 40.6 and 40.3 in the stem and 39.9, 36.9 and 20.1 in the roots.

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Section: Resultsunclassified

Evolução das características da planta associadas à nutrição nitrogenada de repolho

Moreira

Vidigal²

2011

Rev. Ceres

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“…These methods have been widely adopted in crop production and research to monitor plant N status. For example, great potential for saving N by managing fertilizer N by using LCC was reported in rice [42], while others found that the SPAD meter and NDVI measurements were superior to LCC in rice because biomass was a factor in the SPAD meter and NDVI measurements, but LCC reading was not closely related to biomass [43,44]. For other crops, like Chrysanthemum, it was indicated that NDVI values exhibited higher correlation with leaf N than SPAD and atLEAF readings [30], which was presumably due to the small leaves making it difficult to accurately determine which part of the leaf was being sensed for SPAD and atLEAF sensors.…”

Section: Discussionmentioning

confidence: 99%

Rice Leaf Lateral Asymmetry in the Relationship between SPAD and Area-Based Nitrogen Concentration

et al. 2017

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Rice leaves display lateral asymmetry around the midrib, and the narrow side exhibits higher leaf area-based nitrogen concentration (Na) and soil plant analysis development (SPAD) values than the wider side. However, the difference in the relationship between the SPAD of each side and Na of the corresponding lateral half, and the optimal position along the leaf blade for SPAD measurements are not known. In this study, the relationship between SPAD and Na of both sides of the top three leaves was determined with 17 rice varieties grown over three growing seasons in two locations. The relationship between SPAD and Na displayed leaf lateral asymmetry, in which the wide side reflected a higher coefficient of determination than the narrow side. The ability to estimate Na of the whole leaf was slightly improved by averaging SPAD values across the leaf sides and measured points for the top two leaves. Apparently, it was more accurate and easier to measure SPAD readings on the wide side than the narrow side of rice leaf blade with respect to estimating plant N status. Due to the relatively poor relationship of the upper leaf, and the structural limit for SPAD measurements of the base, this study suggests that the most suitable and representative position for SPAD meter measurement on the leaf blade of rice is the lower-middle part from the leaf apex on the wide side.

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“…On the other hand, SPAD values of flag leaf are one index closely related with N content of leaf. Many reports found photosynthesis and grain yield could be affected by the SPAD value of flag leaf at grain filling stage (Ramesh et al, 2002;Jiang et al, 2012;Huang et , and it was reported that the reasonable SPAD value could improve yield, but it varied in different rice varieties. In this study, the SPAD value of flag leaf was about 27-34 at grain filling stage in early rice, and 32-36 in late rice.…”

Section: Discussionmentioning

confidence: 99%

“…In previous studies, it was found that normalized difference vegetation index (NDVI), SPAD and LCC have been used successfully to assess grain yield through building their relationships with N content of leaf or plant population. At different growth stages, Ramesh et al (2002) found that the SPAD values at 79 days after rice sowing correlated well with the grain yield. And LCC has been used successfully to guide fertilizer N application in rice, wheat and maize.…”

Section: Introductionmentioning

confidence: 91%

“…Recently, tools such as leaf color chart (LCC), soil plant analysis development (SPAD) and GreenSeeker optical sensor have become available for the site-specific nitrogen (N) management strategies and prediction of yield potential during rice growth season (Ramesh et al, 2002;Li et al, 2009;Thind et al, 2011;Gnyp et al, 2014). In previous studies, it was found that normalized difference vegetation index (NDVI), SPAD and LCC have been used successfully to assess grain yield through building their relationships with N content of leaf or plant population.…”

Section: Introductionmentioning

confidence: 99%

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Estimating Grain Yield Based on BSW and SPAD at Grain Filling Stage in Double Rice Cropping System of China

Liu¹,

Li²,

PaoLan³

et al. 2016

IJAB

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It may be good to estimate rice yield based on root bleeding snap weight (BSW) and leaf soil plant analysis development (SPAD) at grain filling stages in southeast China. There were seven treatments: (N-butyl) thiophosphoric triamide (NBPT) applied at rates of 0.00, 0.50, 0.75, 1.00, 1.25, 1.50% with urea @ 135 kg N ha -1 and CK (no NBPT or urea). All treatments received 75 kg P2O5 ha -1 (superphosphate, P2O5 12%) and 150 kg K2O ha -1 (potassium sulfate, K2O 60%), and then all fertilizer and inhibitor were applied once as base fertilizer. At grain filling stage, both of early and late rice, root BSW and leaf SPAD readings were obtained and grain yield determined at harvesting. In addition, the relationship between BSW, SPAD and grain yield was established. The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea. Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice. However, these decreased when NBPT was less or more than 1.00%. On the other hand, the relationship between BSW, SPAD at grain filling stage and grain yield could be fitted by two-variable linear equation (p<0.05); and which provided better of validation experiment. Therefore, the grain yield could be predicted better by BSW and SPAD at grain filling stage in double rice cropping system.

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Chlorophyll Dynamics in Rice (Oryza sativa) Before and After Flowering Based on SPAD (Chlorophyll) Meter Monitoring and its Relation with Grain Yield

Cited by 65 publications

References 4 publications

Evolução das características da planta associadas à nutrição nitrogenada de repolho

Evolução das características da planta associadas à nutrição nitrogenada de repolho

Rice Leaf Lateral Asymmetry in the Relationship between SPAD and Area-Based Nitrogen Concentration

Estimating Grain Yield Based on BSW and SPAD at Grain Filling Stage in Double Rice Cropping System of China

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