Effects of Multiple Harvests and Different Manure Fertilization levels on the Yield and Feed Value of Kenaf (Hibiscus Cannabinus L.)
Effects of Multiple Harvests and Different Manure Fertilization levels on the Yield and Feed Value of Kenaf (Hibiscus Cannabinus L.)
Byamungu Mayange Tomple1*, Ik-Hwan Jo2, Rajaraman Bharanidharan1, Seun-Gun Won2 and Muhammad Mahboob Ali Hamid3*
ABSTRACT
Investigation to evaluate the effect of varying levels of manure fertilization on the productivity and feed quality of kenaf (Hibiscus cannabinus L.) during bi-weekly harvests was conducted in Gyeongbuk province, Republic of Korea, over a span of two years. The experimental design adopted a randomized complete block with four harvesting periods (100, 110, 120, and 130 days after planting - DAP) and four manure fertilization levels (0, 150, 200, and 250 kg N/ha), each replicated thrice. The findings revealed a positive correlation between manure fertilization application and kenaf growth, with the greatest plant height observed at the highest manure fertilization levels. The manure fertilization application level of 200 kg N/ha resulted in the highest dry matter (DM) yield, coupled with the highest crude protein (CP) content in kenaf leaves. Elevating manure fertilization level had a significant diminishing effect on acid detergent fiber (ADF) content, concurrently escalating neutral detergent fiber (NDF) content. Notably, the manure fertilization levels of 200 and 250 kg N/ha exhibited the highest total digestible nutrient (TDN) content. The temporal progression of kenaf growth was characterized by increasing height, while no statistically significant differences were detected in DM yield. In summation, optimal growth and development of the kenaf plant were attained through a manure fertilization application level of 200 kg N/ha, coupled with harvesting between 110 and 120 DAP. The adoption of these practices holds the potential to enhance both local and international kenaf markets, while concurrently addressing environmental concerns associated with conventional farming practices.
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