High-yielding Crop Management by Enhancing Growth in Reproductive Stage of Direct-Seeded Rainfed Lowland Rice (<i>Oryza sativa</i>L.) in Northeast Thailand

Hayashi, Satoshi; Kamoshita, Akihiko; Yamagishi, Junko; Kotchasatit, Anuchart; Jongdee, Boonrat

doi:10.1626/pps.13.104

Cited by 6 publications

(3 citation statements)

References 24 publications

(24 reference statements)

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“…'KDML105' at 100% field capacity (well-irrigated condition) was evidently observed, compared with CSSL and double haploid population (Hungsaprug et al, 2020). At heading stage, SPAD value in KDML105 growing in NE Thailand is lowest when compared with IR57514-PMI-5-B-1-2 and HY71, leading to reduction in shoot dry weight and grain yield (Hayashi et al, 2010). Based on the greenness of canopy of rice crop, staying green is an efficient strategy to identify the healthy plants in relation to prediction of high yield attributes (Yoo et al, 2007;Zhao et al, 2019).…”

Section: Discussionmentioning

confidence: 94%

Above-ground vegetation indices and yield attributes of rice crop using unmanned aerial vehicle combined with ground truth measurements

Pipatsitee

Eiumnoh

Tisarum

et al. 2020

Not Bot Horti Agrobo

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Rice is an important economic and staple crop in several developing countries. Indica rice cultivars, ‘KDML105’ and ‘RD6’ are clear favourites, popular throughout world for their cooking quality, aroma, flavour, long grain, and soft texture, thus consequently dominate major plantation area in Northeastern region of Thailand. The objective of present study was to validate UAV (unmanned aerial vehicle)-derived information of rice crop traits with ground truthing non-destructive measurements in these rice varieties throughout whole life span under field environment. Plant height of cv. ‘KDML105’ was more than cv. ‘RD6’ for each respective stage. Whereas, number of tillers per clump in ‘KDML105’ exhibited stability at each developmental stage, which was in contrast to ‘RD6’ (increased continuously). Moreover, 1,000 grain weight, total grain weight and aboveground biomass were higher in ‘KDML105’ than in ‘RD6’ by 1.20, 1.82 and 3.82 folds. Four vegetative indices, ExG, EVI2, NDVI and NDRE derived from UAV platform proved out to be excellent parameters to compare KDML105 and RD6, especially in the late vegetative and reproductive developmental stages. Positive relationships between NDVI and NDRE, NDRE and total yield traits, as well as NDVI and aboveground biomass were demonstrated. In contrast, total chlorophyll pigment in cv. ‘RD6’ was higher than in cv. ‘KDML105’ leading to negative correlation with NDVI. ‘KDML105’ reflected rapid adaptation to Northeastern environments, leading to maintenance of plant height and yield components. Vegetation indices derived from UAV platform and ground truth non-destructive data exhibited high correlation. ‘KDML105’ was rapidly adapted to NE environments when compared with ‘RD6’, leading to maintenance of physiological parameters (detecting by UAV), the overall growth performances and yield traits (measuring by ground truth method). This study advocates harnessing and adopting the approach of UAV platform along with ground truthing non-destructive measurements of assessing a species/cultivars performance at broad land-use scale.

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Section: Discussionmentioning

confidence: 94%

Above-ground vegetation indices and yield attributes of rice crop using unmanned aerial vehicle combined with ground truth measurements

Pipatsitee

Eiumnoh

Tisarum

et al. 2020

Not Bot Horti Agrobo

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“…In case of Cambodia and Laos, rice can be direct seeded earlier than transplanting without waiting for standing water in paddy (Dalgliesh et al, 2016;Laing et al, 2018). Direct-seeded rice can likewise be planted earlier in Northeast Thailand to increase planting window for farmers, but it should be noted that there is yield penalty of direct seeding over transplanting under unfavourable growing conditions (Hayashi, Kamoshita, Yamagishi, Kotchasatit & Jongdee, 2010). Early planting of direct seeding may cause serious weed problems while early standing water is more likely with late planting and this may aid weed control.…”

Section: Discussionmentioning

confidence: 99%

Rainfall variability and its effects on growing period and grain yield for rainfed lowland rice under transplanting system in Northeast Thailand

Sujariya

Jongrungklang

Jongdee

et al. 2019

Plant Production Science

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Rainfall variability in Northeast Thailand during 2000-2015 was examined with objectives to determine any changes in rainfall pattern with time, and to determine its effects on duration of rice growing period and grain yield using a simulation model. Variation in mean annual rainfall over 16 years in 93 locations in the region ranged from over 1,600 to less than 1,200 mm, and the locations were grouped into 4 based on the annual rainfall. The change in annual rainfall, and early, mid and late season rainfall was analysed for the rainfall groups. There was a significant reduction in the amount of early season rainfall during the 16-year period in all groups. However, there was no significant change for annual, and mid and late season rainfall. Simulation study showed that the start of rice growing period (SGP) was delayed with reduced early rainfall during the 16 year period and the end of rice growing period (EGP) was also delayed while there was no significant change for the length of rice growing period (LGP). Simulation results showed that grain yield of KDML105, leading variety in Thailand, tended to increase during the 16 year period, as delayed planting time was optimum for achieving maximum yield in all rainfall groups. With general delay in rainfall season, occurrence of late season drought was predicted to be reduced and this helped to increase simulated grain yield. However, adaptation to changing rainfall pattern needs to be planned in advance to maximize its effect. In Northeast Thailand, changing in rainfall from 2000 to 2015 was investigated. The wet season tended to start later and end later, and this reflected in start (SGP) and end (EGP) of rice growing period (a). Delay in SGP under transplanting shifted the time of potential planting closer to optimum for KDML 105 variety (b) and also delay in EGP decreased severity of drought stress at the end of growing season thus reduced yield loss due to late season drought.

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“…Anaerobic seeding not only reduces the cost of cultivation but is also environment friendly due to the reduction in the use of herbicides compared with other direct sowing methods (Hayashi et al, 2010). If rice can germinate, establish and grow under flooded soil surface, the constraints for both direct wet and dry sowing would be solved and cultivation of rice could be possible with less investment.…”

Section: Discussionmentioning

confidence: 99%

Seed Priming Improves Agronomic Trait Performance under Flooding and Non-flooding Conditions in Rice with QTL SUB1

Sarkar

2012

Rice Science

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Farmers in South East Asia are adopting rice crop establishment methods from transplanting to direct wet or dry seeding as it requires less labour and time and comparatively less energy than transplanting. In contrast to irrigated condition, in rainfed lowland, direct seeding is a common practice. Early flooding controls weeds but decreases seedling establishment in direct seeded rice. Anaerobic germination is an important trait to counteract damages caused by early flooding. Management options which can help in crop establishment and improve crop growth under flooding might remove the constraints related to direct seeding. The investigation was carried out with two near isogenic lines Swarna and SwarnaSub1. Swarna-Sub1 is tolerant to submergence whereas Swarna is susceptible. Seed priming was done with water and 2% Jamun (Syzygium cumini) leaf extract, and it improved seedling establishment under flooding. Acceleration of growth occurred due to seed pretreatment, which resulted longer seedling and greater accumulation of biomass. Seed priming greatly hastened the activities of total amylase and alcohol dehydrogenase in Swarna-Sub1 than in Swarna. Swarna-Sub1 outperformed Swarna when the plants were cultivated under flooding. Weed biomass decreased significantly under flooding compared to non-flooding conditions. Seed priming had positive effects on yield and yield attributing parameters both under non-flooding and early flooding conditions.

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High-yielding Crop Management by Enhancing Growth in Reproductive Stage of Direct-Seeded Rainfed Lowland Rice (Oryza sativaL.) in Northeast Thailand

Cited by 6 publications

References 24 publications

Above-ground vegetation indices and yield attributes of rice crop using unmanned aerial vehicle combined with ground truth measurements

Above-ground vegetation indices and yield attributes of rice crop using unmanned aerial vehicle combined with ground truth measurements

Rainfall variability and its effects on growing period and grain yield for rainfed lowland rice under transplanting system in Northeast Thailand

Seed Priming Improves Agronomic Trait Performance under Flooding and Non-flooding Conditions in Rice with QTL SUB1

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