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Effect of Plant Spacing on Growth and Yield Components of Two Sorghum (Sorghum bicolor L.) varieties Under Rain fed Conditions.
Abstract
ABSTRACT
A field experiment to evaluate the effect of different plant spacing on the yield of sorghum varieties was conducted at Kabkabia city, North Darfur State, Sudan, during rainy seasons of 2015 and 2016. The experiment was laid out in a Randomized Complete Block Design (RCBD) having four replications. Two varieties V1 (Tabat) and V2 (Wad Ahmed) and four spacing treatments S1 (50 cm x 50 cm), S2 (50 cm x 25 cm), S3 (75 cm x 50 cm) and S4 (75 cm x 25 cm) were used. Results showed that variety Wed Ahmed produced more seed weight per feddan, and more 100- seed weight but was shorter than variety Tabat. Similarly, grain yield of Wad Ahmed was significantly greater than that of Tabat, at the narrow plant spacing (50x25cm) compared to the wide plant spacing (75x50cm); it gave the maximum yield of 1279.15gm-1 against the minimum yield of 622.05gm-1 in the latter. It is recommended that the crop should be sown during the rainy season with a plant spacing of 50x25 cm.
Key words: Sorghum varieties; plant spacing; grain yield.
... This result agrees with the report of Aklilu et al. (2021) who reported significant differences observed in plant height among the sorghum varieties are likely to be related to genetic differences. Although Eldie and Fadul (2017) showed that the effect of plant population on plant height was not-significant. The report of Zakka et al. (2020) showed that no significant effect of plant spacing on plant height, leaf length, leaf width, number of tillers per plant, stem diameter and number of leaves per plant. ...
... The significant differences observed in thousand seed weight among the sorghum varieties are likely to be related to genetic differences. This result was in line with the finding of Eldie and Fadul (2017) who have shown the differences among sorghum varieties in thousand seed weight. ...
... These differences in the grain yield of varieties may have been due to the differences in their yield potential. The present results are in agreement with the findings of Eldie and Fadul (2017), Farnham (2001) and Zakka et al. (2020) who confirmed the existence of significant variations in grain yield of sorghum varieties. ...
The experiment was conducted to determine optimum plant spacing and suitable variety and as well as to identify the interaction effect of varieties and Intra-row spacing on the yield of sorghum. The experiment having a factorial arrangement of three varieties (Geremew, Lalo and farmer’s local variety) and three intra-row levels (10 cm, 15 cm and 20 cm) was laid out in randomized complete block design (RCBD) with three replications. According to the current results, varieties were significantly (p<0.05) affected by all the parameters (days to maturity, plant height, panicle length, thousand seed weight and total grain yield) except stand count. The maximum days to maturity and total grain yield (205.2 days and 5628.1 kg ha-1 respectively) were obtained from Lalo. The highest thousand seed weight (23.1 g) was recorded from Geremew and at it takes a short period for maturity (119.5 days). Similarly, intra-row spacing significantly (p<0.05) affected the panicle length and stand count. The highest panicle length (28.15 cm) was recorded in 15 cm intra-row spaced plants. The maximum stand count (78.6 % and 83.6%) was obtained from 15 cm and 20 cm spaced plants respectively. Generally, the outcome of this study revealed that even though the yield was statistically non-significant to intra-raw spacing, at 15cm and 20cm the grain yield was a maximum of 4178.5 kg ha-1 and 4190.9 kg ha-1, respectively. Therefore, among the intra-row spacing 20 cm intra-row spacing for its minimized planting materials (seed) and easy management and among the varieties, Lalo could be promoted in study areas and similar agro-ecologies. Int. J. Agril. Res. Innov. Tech. 12(2): 138-143, December 2022
... The lowest yield parameters were observed in closer spacing, i.e.30 x 5 cm. Low test weight, grain weight per panicle in 30 x 5 cm spacing might be due to higher plant population, which resulted in lesser photosynthetic rate availability and higher respiration rate because of mutual shading as reported by Eldie et al. (2017). ...
India is one of the most vulnerable countries to climate change and its impact on agricultural production and livestock. Sorghum (Sorghum bicolor) is an important food crop of India cultivated in tropical and subtropical climates, especially the semiarid tropics; varying environmental attributes significantly affect its duration and yield. Therefore, the present research aimed to evaluate the potential of dual-purpose sorghum under varying sowing windows and crop geometry. The experiment was conducted in Eastern block farm of Tamil Nadu Agricultural University during the summer season- 2022. The experiment was laid out in strip plot design with three different dates of sowing in the main plot, i.e., D1 - First fortnight of February, D2 - First fortnight of March and D3 - First fortnight of April and six different crop geometries in the subplot viz., 45 x 15 cm (S1),45 x 10 cm(S2), 45 x 5 cm (S3), 30 x 15 cm (S4),30 x 10 cm (S5) and 30 x 5 cm (S6) and replicated thrice.The results revealed that sowing during the first fortnight (I FN) of April with a spacing of 45x 15 cm resulted in maximum grain yield(2585 kg/ha) and for fodder yield, April I FN sowing with a crop geometry of 30x 5 cm resulted in maximum green biomass (43.6 t/ha) as well as dry matter production. So, spacing of 30x 5 cm helps in better utilization of resources along with maximum fodder yield.
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