The Growth Phase and Yield Difference of Kenaf (Hibiscus cannabinus L.) on Soil Salinity in Reclaimed Land

Abstract

Kenaf (Hibiscus cannabinus L.) was recognized as a potential source of forage. To reduce the production cost, we should insure large cultivation area. The one of the best candidate places to expand the useful kenaf production was 'Saemangeum' reclaimed land. To confirm the possibility of kenaf growth in reclaimed land, we seeding and cultivated the kenaf in 'Saemangeum'. The germination percentage of kenaf on 5.0 dS/m soil salinity was 18%. It is less 66% than that of 4.0 dS/m soil salinity and at 6.0 dS/m, the germination percentage of kenaf was under 10%. The growth and development of kenaf in reclaimed land grew worse with increasing soil salinity. The stem diameter which the most important factor that decide the value and yield of product was upper 2.6 cm when soil salinity maintained under 4.0 dS/m, but if soil salinity marked over 4.0 dS/m, the stem diameter of kenaf was drop under 2.0 cm and it deteriorate the number of leaves per plant by 20~46%. The necrosis on older tip and marginal leaves were noted approximately first month after seeding which was correlated directly with the salinity levels of reclaimed soil. Reduction of total yield was coincide with increasing levels of EC. If soil salinity over 5.0 dS/m, the amount of decreased by soil salinity was 51% than that of non-reclaimed region. The allowable soil salinity level of which could be maintained within 20% reduction rate was 4.2 dS/m. Consequently kenaf can be grown successfully with moderately saline soil condition. However, salt levels in excess of 4.2 dS/m severely have restricted plant growth and development and will result in significant yield reduction.

Heterogeneity Assessment of Kenaf Breeding Field through Spatial Dependence Analysis on Crop Growth Status Map Derived by Unmanned Aerial Vehicle

“…The height of kenaf is a representative phenotypic trait that can be selected as the breeding selection criterion to maximize the yield [6]. However, kenaf is a rapid growing plant that reaches up to 4-6 m in height, and it requires significant labor and time to measure its height in different seasons [7]. Recently, a field survey based on remote sensing has been highlighted to solve this problem with a high-throughput data acquisition system [8,9].…”

Growth Responses of Kenaf (Hibiscus cannabinus L.) to Irrigation and Fertilization in Saemangeum Reclaimed Land

“…케 나프는 열대작물이지만 환경에 대한 적응성이 강하여 다양한 기후 특성을 지닌 지역과 척박한 토양환경에서도 잘 자 란다 (Webber III and Bledsoe, 1993). 또한 케나프의 재배가능 토양 염도는 4.0 dS m -1 로 비교적 높은 염농도에서도 생산성을 유지할 수 있어 토양 염도가 높은 간척지에서 재배가 가능한 작물로 알려져 있다 (Kang et al, 2014a).…”

Optimum Application Rate of Nitrogen, Phosphorus, and Potassium Fertilizers for Kenaf (Hibiscus cannabinus L.) Yield and Soil Chemical Properties in a Reclaimed Paddy Soil: A Pot Experiment

“…케나프 (Hibiscus cannabinus L.)는 대표적인 바이오 에너지 작물로 에너지, 섬유생산 및 가축사료 등 다양한 용도 로 활용되는 다목적 작물이며 (Webber III and Bledsoe, 2002;Alexopoulou et al, 2004;Meryemoğlu et al, 2014), 서아프리카가 원산지인 아열대 일년생 식물이다 (Meints and Smith, 2003). 케나프는 파종 후 3 -4개월 내에 수확할 수 있어 경제적 가치가 높을 뿐만 아니라, 바이오매스 생산량이 평균 70 -90 Mg ha -1 수준으로 (Kang et al, 2018), 옥 수수에 비해 약 1.4배 가량 높은 편이어서 (NIAS, 2017) 에너지작물로서 가치 또한 매우 높은 편이다 (Sim and Nyam, 2021).…”