Effects of Plant Density on Sweet and Baby Corn (Hybrid KSC 403) Yield and Yield Components

پژوهشهای زراعی ایران

Article 5, Volume 14, Issue 1 - Serial Number 41, April 2016, Pages 100-108   

Document Type: Research Article

DOI: 10.22067/gsc.v14i1.34172

Authors

H Bavi; M. R Moradi Telavat^* ; S. A Siadat; A Koochekzadeh

Ramin Agriculture and Natural Resources University of Khuzestan

Abstract

Introduction
Sweet corn is the one of the most important types of corn. There is a high amount of sugar in the endosperm of sweet corn than dent corn. Baby corn is the ear of corn that is being harvested in the silking stage before the end of pollination. This crop has an interesting using methods as salad, conserve production and vegetative consumption. Both two sweet and baby corn is obtained from one plant in different growth stages and could be harvested from one corn hybrid. Best yield and quality of baby corn is obtained from sweet corn hybrids, because of high amounts of sugar in the grains and ears. Sweet corn and baby corn could be harvested at early dough stage (with about 30 % of humidity) and early silking stage before the pollination is completed, respectively. Plant density is the most important factor in growing corn, especially in sweet and baby corn. Khuzestan province is one of the main regions of corn production in Iran. In Khuzestan, forage and silage corn have the most production among the summer crops. Corn is planted in two planting date in Khuzestan: early spring and early summer. Spring corn planting produces little grain yield due to Simultaneity of silking stage with hot early summer days. Because of little production and little research about sweet and baby corn, this study was performed and designed.
Materials and Methods
In order to investigate the effects of plant density and harvesting method on sweet corn and baby corn yield, an experiment was performed during 2012-13, in research farm of Ramin Agriculture and Natural Resources University of Khuzestan, located in southwest of Iran. In this experiment, four plant densities (7, 9, 11 and 13 plants.m-2) and two harvesting methods (baby corn and sweet corn) were investigated in an RCB statistical design with four replications. The KSC 403 hybrid was used and investigated in the experiment, as a sweet corn hybrid. Statistical analysis was performed using SAS 9.1 through GlM procedure. Means of all treatments were comprised using least significant difference (LSD) at 5 % probability level.
Results and Discussion
The effects of plant density on yield components of baby corn was significant. Increasing the plant densities increased the ear number and percentage of non-standard ears. The Highest yield of ear without husk, standard and non-standard were obtained (2649.5, 766.97, and 3043.9 kg.ha-1, respectively) with 13 plants.m-2. In sweet corn, increasing plant density from 7 to 13 plants.m-2, decreased row per ear, grain per row and thousand grain weight. Highest grain yield (1232.5 kg ha-1) and green ear (12607.2 kg ha-1) of sweet corn were obtained with plant density of 9.m-2.
Conclusions
Analysis of correlation showed that in both baby and sweet corn, there were positive and significant correlations between yield and its components. There was the high number of non-standard ears in all experimental treatments. In sweet corn, the standard ear without husk yield has positive and significant correlation with all traits except the percentage of standard ear and sheathed ear weight. In addition, unsuitable climate conditions during silking stage reduced the yield of sweet corn through the high number of aborted florets. Yield of sweet corn yield showed negative and significant correlation with grain row per ear and grain per row. However, increasing the ear number.m-2 increased yield in higher plant densities up to 9 plant.m-2 density.
Generally, the baby corn had high yield with good quality in this region, but, standard ear percent of the baby corn of the hybrid KSC 403 was very low. On the other hand, sweet corn grain yield was low due to high air temperatures during pollination and maturity stages.

Keywords

Correlation; Ear Without sheath; Green ear; Standard ear; Thousand grain weight

References

1. Calarastaghi, K., Rahmani, A., and Khavari Khorasani, S. 2009. The Reaction Morphological Traits of Baby Corn var KSC403su to Planting date delayed, Plant density and metod Harvest. Scientific Journal of Ecophisiology of Crop and Weeds 4 (15): 55-66.

2. Eskandarnejad, S., Khavari Khorasani, S., Bakhtiari, S., and Heidarian, A. R. 2013. Effect of spacing and plant density on yield components of Sweet Corn (Zea mays L. Saccharata) varieties. Advanced Crop Science 3: 81-88.

3. Haghighat, A., Shirani Rad, A. H., Seyfzadeh, S., and Yousefi, M. 2012. Effect of Cattle manure and plant density on sweet corn yield grown different cropping methods. International Journal of Agronomy and Plant Production 3: 696-699.

4. Hallauer, A. R. 2001. Specialty Corn. CRC Press LLC.

5. Lashkari, M., Madani, H., Ardakani, M. R., Golzardi, F., and Zargari, K. 2011. Effect of plant density on yield and yield components of different Corn (Zea mays L.) hybrids. AM-Euras. Journal of Agriculture and Environmental Sciences 10 (3): 450-457.

6. Mokhtar pour, H., Mossavat, S. A., Faiz bakhsh, M. T., and Saberi, A. 2008. Effect of sowing date and plant density on ear yield of sweet corn in summer sowing. Electronic Journal Crop Planting 1 (1): 101-113.

7. Moraditochaee, M., Motamed, M. K., Azarpour, E., and Khosravi Danesh, R. 2012. Effects of nitrogen fertilizer and plant density management in corn farming. ARPN Journal of Agriculture and Biological Sciences 7 (2): 133-137.

8. Morris, T., Hamilton, G., and Harney, S. 2000. Optimum plant population for fresh market sweet corn in the Northeastern United States. Horticulture and Technology 10: 331-333.

9. Nikkhah kheibari, M., Khavari Khorasani, S., and Taheri, Gh. 2012. Effects of plant density and variety on some of morphological traits, yield and yield components of baby corn (Zea mays L.). International Research Journal of Applied and Basic Sciences 3 (10): 2009-2014.

10. Rahmani, A., Khavari Khorasani, S., and Nabavi Kalat, S. M. 2009. Effects of Sowing Date and Plant Density on morpho-phyisilogical triats, Yield and Yield Components of (Baby Corn) Var. ksc. Journal of Seed and Plant 25-2 (4): 449-463.

11. Rahmati, H. 2012. Effect of plant density and nitrogen rates on morphological characteristics grain maize. Journal of Basic and Applied Sciences and Research 2 (5): 4680-4683.

12. Sarlangue, T., Andrade, F. H., Calvino, P. A., and Purcell, L. C. 2007. Why do maize hybrids respond differently to variation in plant density? Agronomy Journal 99: 984-991.

13. Schulteis, J. R. 2002. Sweet corn production. www. ces. ncsu. edu.

14. Shafi, M., Bakht, J., Ali, S., Khan, H., Aman Khan, M., and Sharif, M. 2012. Effect of planting density on phenology, growth and yield of maize (Zea mays L.). Pakistan Journal of Botany 44 (2): 691-696.

15. Shakarami, G., and Rafiee, M. 2009. Response of corn (Zea mays L.) to planting pattern and density in Iran. American-Eurasian Journal Agriculture and Environmental Sciences 5 (1): 69-73.

16. Siadat, S. A. 1995. The Effect of density and hybrid on corn yield in summer and spring in Khuzestan Province.

17. Soltani, A. 2007. Application soft ware SAS in statistical analisis. Publications University Jihad Mashhad.