Pustaka Ilmiah Universitas Padjadjaran

Abstrak

Growth and Yield of Job’s Tears (Coix lacryma-jobi L.) Response to Different Types of Oldeman Climate Classification and Row Spacing in West Java Indonesia

Background: Job’s tears (Coix lacryma-jobi L.) is one of potential staple crop to improve food security as alternative or substitute to rice. Productivity of job’s tears need to be developed and improved through the adjustment of the environment and cultivation techniques. Micro climate and crop row spacing in job’s tears cultivation has not been widely studied. There was a need to know ideal micro climate and crop spacing to growth and yield of job’s tears. The results of this study are very important in agronomic engineering to improve productivity of job’s tears. Materials and Methods: This experiment used one Coix cultivar, which was obtained from the West Java Indonesia that has the characteristics of high yield and a shorter life span. Three types of Oldeman climate and three row spacing were selected and designed to investigate the interactive effects of the types of climate and row spacing on its growth and yield. The experimental design was split plot experimental design with three types of Oldeman climate classification (C2, C3 and D3) used as the whole plot and three types of row spacing (50, 75 and 100 cm) were used as the split plot and three replications. Several agronomic characteristics of Coix such as crop height, crop biomass, productive tiller number, panicles number, leaf area index, shoot-root ratio, 100grain yield and harvest index were recorded. Results: This study showed significantly interactive effects of climate type and row spacing on panicles number, leaf area index and shoot root ratio. The results also showed non interactive effects of climate type and row spacing on height, biomass, productive tiller numbers, 100-grain weight, grain weight per crop, grain weight per m2 and harvest index. However, the different types of climate and row spacing showed significantly independent effects on these parameters but non significantly independent effects on 100-grain weight. Conclusion: Based on the results, it was concluded that climate type and row spacing had significantly interactive effects on the growth and yield of Coix.