| Popis: |
Integrated plant management technology involving combination plant nutrient and environment management could be important strategies in improvement maize production, especially in sub-optimal (marginal) soil. The aim of this research was to enhance sustainability of maize production with introducing liquid bio-ameliorant to reduce chemical fertilizer and optimizing plant growth space. Field research on Alfisol soil with split factorial experimental design was applied with three treatments factors. Two treatments of planting space (75x25 cm; and 50x20 cm), three levels of chemical fertilizer (0 kg, 300 kgand 240 kg urea/ha), and three levels of liquid bio-ameliorant (0 ml/L, 100 ml/L, and 300 ml/L), all treatment was done in three replications. The results showed that integrating treatments of liquid bio-ameliorant, nitrogen, and planting space improved maize production. The highest biological yield as plant height, number of plant leaves, biomass weight, plant nutrient content, and soil microorganism population was showed in treatment of 100 ml/L liquid bio-ameliorant, 300 kg/ha urea, in 75 cm x 25 cm planting space. However in total production, treatment of 300 ml/L liquid bio-ameliorant, 240 kg/ha urea in 50 cm x 20 cm planting space was shown the highest result. The addition of 300 ml/L liquid bio-ameliorant can decrease use of chemical fertilizer, and number of plant population increased. In the light of result achieved, it could be conclude that improvement maize production in marginal soil could be done by integrated treatment between liquid bio-ameliorant, nitrogen, and planting space. In the same line sustainability of land resources could be maintain as result of reducing chemical fertilizer and increasing bio-ameliorant application. |
