Relationship between Spacing and Grain Yield of Rice Plant

Takeda, Tomoshiro; Hirota, Osamu

doi:10.1626/jcs.40.381

Cited by 13 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The planting density at which grain yield plateaued was lower than biomass yield. The results of Takeda and Hirota (1971) showed that grain yield was practically unchanged between planting densities from 10 to 100 hills per m 2 . These results indicate that rice has a wide adaptability to planting density through regulation of panicle numbers, number of spikelets per panicle and grain-fi lling percentage, depending on environments.…”

Section: (B) Wide Space Planting With Single Seedling Per Hillmentioning

confidence: 94%

See 1 more Smart Citation

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Horie¹,

Shiraiwa²,

Homma³

et al. 2005

Plant Production Science

168

View full text Add to dashboard Cite

Section: (B) Wide Space Planting With Single Seedling Per Hillmentioning

confidence: 94%

“…Many classical experiments tested planting density from a few hills per m 2 to several hundreds hills per m 2 (Kanda and Kakizaki, 1956;Takeda and Hirota, 1971). Those results generally showed biomass and grain yields both initially increased and then reached different plateaus.…”

Section: (B) Wide Space Planting With Single Seedling Per Hillmentioning

confidence: 99%

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Horie¹,

Shiraiwa²,

Homma³

et al. 2005

Plant Production Science

168

View full text Add to dashboard Cite

“…Oyedokun (1977) for IITA upland rice varieties and Clerget et al (2016) for a recent upland variety of NSIC-Rc222 found no significant effects of plant density for both components. For lowland rice, Kondo (1944), Takeda and Hirota (1971) All these suggest that some factors other than plant density were at work in regulating the plant-density responses of these components.…”

Section: Response-function Estimationmentioning

confidence: 99%

Effects of plant density on the performance of selected African upland rice varieties

Matsumoto¹,

Tsuboi²,

Asea³

et al. 2017

Afr. J. Agric. Res.

View full text Add to dashboard Cite

The effects of plant density on yield and yield components in upland rice cultivation were examined by conducting a series of field experiments in Central Uganda, using three African and one Japanese improved upland rice varieties. The estimation of plant-density response functions with respect to yield components and yield revealed that an increase in plant density significantly decreased the number of panicles per hill, number of spikelets per panicle, and 1000-grain weight, and significantly increased the number of panicles per square meter. The percentage of filled grain was not affected by plant density. Compared to the Japanese variety, the three African varieties were characterized by more numbers of panicles/hill, less numbers of spikelets/panicle, higher grain-filling ratio and lighter 1000-grain weight, but differences in the degrees of response to plant density were less distinct between them. Rice yield increased in the range of plant density tested, though the marginal increase in yield due to an increase in plant density by 1 hill/m 2 diminished from 100 kg/ha at the plant density of 11 hills/m 2 to 30 kg/ha at 33 hills/m 2 . No significant differences were found among the four varieties for the level of yield as well as for its degree of positive response to plant density. The yield components that determined the increase in yield were the number of panicles per square meter and the number of spikelets per panicle, or combined together, the number of spikelets per square meter, which was estimated to reach the maximum at the plant density of 35 hills/m 2 . When the differences among the treatments in the costs of seeds and weed-control were considered, the optimum plant density was found to be 22 hills/m 2 (plantspacing of 30 cm × 15 cm), lower than the plant density that gives the maximum yield.

show abstract

“…5). PFG was lower under a higher planting density (Takeda and Hirota, 1971) and SAFDL practice (Tanaka, 1979). The change of PFG in response to sink size differed with the cultivar; YD showed a decreasing rate in PFG 1/3 that of HH.…”

Section: ．Percentage Of Filled Grains (Pfg)mentioning

confidence: 99%