Abstract
A field experiment was aimed at investigating the effect of natural guano organic fertilizers on growth and yield of Spring Onion (Allium fistulosum L.). The experiment was conducted from September to Nopember, 2014 in Unamendaa Village, Kolaka District. It was prepared by using a randomized block design (RBD) with single factor namely doses of natural guano organic fertilizers. The treatments consisted of 4 levels were : (1) G0 = control or no treatment, (2) G1 = dose of 6 kg unit-1 (equivalent to 5 t. ha-1), (3) G2 = dose of 12 kg unit-1 (equivalent to 10 t. ha-1) and (4) G3 = dose of 18 kg unit-1 (equivalent to 15 t. ha-1), respectively. Every treatment was replicated 3 times, therefore overall there were 12 experimental units. Data was collected on growth and yield parameters of Spring Onion : (1) plant height, (2) number of leaves, (3) number of tillers, (4) diameters of stem and (5) yield (plant fresh weight unit-1). Data obtained were analyzed using Analysis of Variance (Anova) and followed by Duncan’s Multiple Range Test (DMRT) at the 1 % level. The result of experiments showed that fertilizations using natural guano organic was significantly affected on : plant height, number of leaves, number of tillers, diameter of stem and plant fresh weight, respectively. Untill fertilization of 18 kg unit-1 (G3) were able to increased the growth and yield of Spring Onion, hence it was showed better performance on all parameters
Highlights
Leek (Allium fistulosum L.) is one of the important vegetable that has the potential to be developed intensively and commercial production for marketing prospects for the domestic market in the domestic market and overseas, (Laude & Tambing, 2010 )
Results of research Harahap et al, (2003) on natural guano fertilizers on growth and yield of potatoes in medium plateau in South Tapanuli shows that the highest tuber yield of 15.75 tons ha-1 derived from guano fertilizer dosage 15 ton ha-1, followed successively: the tuber yield 15.42 tons ha-1 at a dose of 20 tons of guano fertilizer ha-1, the tuber yield 15.20 tons ha-1 at a dose of 15 tons of guano fertilizer ha-1, the tuber yield 13.10 tons ha -1 doses of cow manure 20 ton ha-1, the tuber yield 12 tons ha-1 at a dose of 5 tons of guano fertilizer ha-1, and the lowest tuber yield of 8.6 ton ha-1 was obtained from the control treatment
Natural guano fertilizer application to plant onion and other vegetable crops have not been widely publicized, both in doses guano fertilizer plant species as well as a variety of guano fertilizer combined with other organic fertilizers or inorganic fertilizers
Summary
Leek (Allium fistulosum L.) is one of the important vegetable that has the potential to be developed intensively and commercial production for marketing prospects for the domestic market in the domestic market and overseas (exports), (Laude & Tambing, 2010 ). Farming conventionally tend to use inputs of inorganic fertilizers and synthetic pesticides in high doses and intensively, it can improve results in the short term but in the long term can lead to many problems such as the hardening and soil compaction, dewatering several micro-nutrients, groundwater pollution and the resurgence of certain types of pests and diseases that decrease the productivity and quality of land (Suwandi et al, 2015) and are not sustainable or environmentally friendly (Reijntjes et al, 1999 ; Narkheda et al, 2011). Results are expected to be an alternative solution in the field of the use of organic fertilizers, on vegetable crops, to improve productivity and quality of dry land that has been widely degraded by the use of inorganic fertilizers and synthetic pesticides excessive
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