Effects of Planting Density and Fertilizer Level on Corn Growth and Yield for Bio-energy Production in No-till Cultivation with Hairy Vetch Cut Mulching
2011
Kim, C.G., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Cho, H.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Jeon, W.T., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Seong, K.Y., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Jeong, K.H., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Choi, B.S., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Cho, Y.S., Gyeongnam National University of Science and Technology, Jinju, Republic of Korea
This study was conducted to develop no-till cultivation system and to reduce agro-chemicals input by cut mulching of hairy vetch on corn cultivation for bio-energy production. Corn was sown with 2 planting density (71,430 and 125,000 plants ha-¹) on 20 May in 2009 under no-till cultivation with cut mulching of hairy vetch. In no-till corn cultivation with cut mulching of hairy vetch, the plant height, diameter of main stem and SPAD value decreased with increasing the planting density. Ear position of corn was high and silking date of corn cultivated in cut mulching of hairy vetch was also delayed average 3 days as compared with the conventional practice, and it was associated with increasing the plant density and reducing the fertilizer application level. Moreover, dominant weeds in corn cultivation field were Persicaria blumei, Digitaria ciliaris (Retz.) Koel. and Echinochloa crusgalli, and the dry weight of weed decreased with increasing the soil cover rate of hairy vetch. Amount of the bio-ethanol production in cut mulching of hairy vetch decreased by 10.2 to 41.1% and it seemed to be associated with increasing the plant density and reducing the fertilizer application level. At no-till corn cultivation with cut mulching of hairy vetch for bio-energy production, the biomass production of combined system of reducing fertilizer application level of 50% and the planting density of 125,000 plants ha-¹ would be similar to the conventional one and it could be suitable for eco-friendly bio-energy corn production.
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