Plant characteristics associated with weed competitiveness of rice under upland and lowland conditions in West Africa

Saito, Kazuki; Azoma, K.; Rodenburg, Jonne

doi:10.1016/j.fcr.2010.01.008

Cited by 61 publications

(46 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…'Deylamani' had more LAI45 than 'Hashemi', when averaged across spatial patterns and pretilachlor rates (Table 3). Contrary to this result, Saito et al (2010) reported that rice genotypes did not significantly differ in LAI at 42 days after seeding, but significantly differed in LAI at 63 days after seeding under weed-free conditions. Moreover, uniform planting pattern produced significantly greater LAI at 45 days after transplanting than wide-row planting pattern when averaged across cultivars and pretilachlor rates (Table 3).…”

Section: Resultscontrasting

confidence: 45%

See 1 more Smart Citation

Effects of spatial pattern and cultivar on weed control and grain yield in rice at reduced rates of herbicide

Aminpanah¹

2015

Biosci. J.

View full text Add to dashboard Cite

ABSTRACT:To evaluate the effects of herbicide rate, cultivar, and spatial pattern on rice grain yield and weed suppression, a field experiment was conducted on a lowland rice field at the Rice Research Station of Tonekabon, north of Iran, in 2011. The experimental design was a split plot-factorial where the whole plot portion was a randomized complete block with three replicates. Main plots were pretilachlor rates (0, 0.5, 1, 1.5, 2 L ha -1 of pretilachlor). The subplots were factorial combinations of two crop spatial patterns (uniform and wide-row planting patterns, 20× 20 and 30 × 13 cm, respectively) and two traditional rice cultivars ('Hashemi' and 'Deylamani'). Regardless of cultivar and spatial pattern, rice grain and biological yields, panicle number per m 2 , leaf area index, and herbicide efficacy increased, while weed biomass decreased with increasing pretilachlor application rate. Rice grain and biological yields, panicle number per m 2 , leaf area index, and herbicide efficacy were significantly greater in uniform planting pattern than in wide-row planting pattern when averaged over cultivars and pretilachlor rates. Moreover, uniform planting pattern of rice plants suppressed weeds 39% better than wide-row planting pattern as averaged across pretilchlor rates and cultivars. 'Deylamani' produced grater grain and biological yields, panicle number per m 2 , leaf area index than 'Hashemi' as averaged across pretilachlor rates and spatial patterns. This experiment illustrated that uniform spatial pattern increased weed suppression, herbicide efficacy, and grain yield.

show abstract

Section: Resultscontrasting

confidence: 45%

“…Contrary to this result, Gealy et al (2003) reported that 'PI 3127779' rice cultivar suppressed barnyardgrass more than did 'Lemont'. Moreover, Saito et al (2010) found large variation in weed biomass among rice genotype. …”

Section: Resultsmentioning

confidence: 99%

Effects of spatial pattern and cultivar on weed control and grain yield in rice at reduced rates of herbicide

Aminpanah¹

2015

Biosci. J.

View full text Add to dashboard Cite

show abstract

“…The duration of the fallow period is determined by rainfall and may be as short as three weeks in the upland areas of Java and up to 16 weeks in the lowlands. Our research showed that season has an effect on species numbers, thus supporting [37] in that there was more weed growth in the dry season than in the wet season (but see [38]). …”

Section: Plant Diversity In Rice Fieldsmentioning

confidence: 71%

Effects of surrounding crop and semi-natural vegetation on the plant diversity of paddy fields

Kumalasari

Bergmeier

2014

Agric & Food Secur

View full text Add to dashboard Cite

show abstract

“…Saito et al (2010b) also found that some aerobic rice cultivars had higher yields than NERICA 1 with and without weed competition. This result is consistent with two studies in the Philippines (Table 2; Zhao et al, 2006; Namuco et al, 2009).…”

Section: Performance Of Upland Nerica Aerobic Rice and Aus Cultivarsmentioning

confidence: 84%

“…Recently, the AfricaRice and partners extensively compared growth and yield performance of upland NERICA cultivars, especially NERICA 1, 2, and 4, with that of their O. sativa (WAB56‐104) and O. glaberrima (CG 14) parents (Ekeleme et al, 2009; Koné et al, 2009, 2010; Oikeh et al, 2009; Saito and Futakuchi, 2009; Kamara et al, 2010; Saito et al, 2010a, b, c; Sokei et al, 2010; Y. Sokei, unpublished data, 2010). These studies assessed cultivar differences in responsiveness to N and P fertilizer applications, weed competitiveness, and yield performance under different management practices (e.g., plant density, fallow system).…”

Section: Performance Of Upland Nerica Cultivars and Their Parentsmentioning

confidence: 99%

Enhancing Rice Productivity in West Africa through Genetic Improvement

2012

Self Cite

View full text Add to dashboard Cite

Rice yields have stagnated in West Africa at 1 to 2 Mg ha"^ because of unfavorable rice environments and poor management practices. Interspecific rice cultivars, the New Rice for Africa (NERICA), were developed by crossing Asian rice {Oryza sativa L.) and African rice (O. glaberrima Steud.) to improve upland and lowland rice productivity in resource-poor farmers' fields. This paper provides an overview of recent studies, performed by the Africa Rice Center and its partners, on evaluation of growth and yield performance of upland and lowland NERICA cultivars and modern Asian rice cultivars including the improved upland indica cultivars often termed aerobic rice. Upland NERICA cultivars were found to lack the expected combination of superior yield potential with weed suppressive ability (WSA) and adaptation to low soil fertility, instead sharing similarity in these characteristics with their O. sativa parent WAB56-104 but remaining inferior to their O. glaberrima parent CG 14 in terms of tillering ability and WSA. Some aerobic rice cultivars were identified for high yielding ability, strong WSA, and superior adaptation to low-fertility uplands and waterlimited lowlands. Some lowland NERICA cultivars outyielded improved lowland O. sativa checks and aerobic rice cultivars in favorable lowlands, whereas they did not perform well in water-limited lowlands. The implications of these findings for future challenges for genetic improvement in West Africa are discussed.

show abstract

Plant characteristics associated with weed competitiveness of rice under upland and lowland conditions in West Africa

Cited by 61 publications

References 30 publications

Effects of spatial pattern and cultivar on weed control and grain yield in rice at reduced rates of herbicide

Effects of spatial pattern and cultivar on weed control and grain yield in rice at reduced rates of herbicide

Effects of surrounding crop and semi-natural vegetation on the plant diversity of paddy fields

Enhancing Rice Productivity in West Africa through Genetic Improvement

Contact Info

Product

Resources

About