The results show that the fertilization treatment in the greenhouse experiment had a significant effect on plant height at the age of 30 dap and tuber fresh weight. Fertilization treatment in the field experiment shows a significant effect on plant dry weight at harvest, tuber fresh weight and tuber production per hectare. Plant dry weight, Number of tillers and Tuber fresh weight: The results of the experiment in the greenhouse show that the treatment given did not have a significant effect on the plant dry weight and the number of tillers, but a significant effect on the fresh weight of shallot tuber (Table 2).
Fertilization treatment in the greenhouse experiment had a significant effect on the variables of plant height at the age of 30 dap and tuber fresh weight. Fertilization treatment in the field experiment shows a significant effect on the variables of plant dry weight at harvest, tuber fresh weight and tuber production per hectare. In this treatment, the sulfur nutrient could increase the tuber fresh weight by 4.5% in the greenhouse experiment.
Introduction
Sulfur in terms of plant cultivation is one of the essential elements that plants require. Therefore, the use of sulfur in agriculture can be seen through three approaches: first, by looking at the sulfur status of lands intended for agribusiness development. Sulfur can improve the health and resistance of shallot plants to pathogens, and can increase antimicrobial production [7].
In the agricultural development plan, Central Sulawesi will become a center for shallot production in the eastern region of Indonesia, with processed products in the form of fried onions that excel in taste and quality. Therefore, the development of this commodity also indicates a high demand for sulfur in the future. This gas is produced in liquid form, namely in the form of liquefied natural gas (LNG), liquefied petroleum gas (LPG) and town gas.
This process is carried out to reduce the sulfur content of the gas to the permissible limit which is below 4 ppm. The production of biosulfur from the gas treatment process in PT Pertamina EP is estimated at 15 tons/day, and this sulfur is pure sulfur in the form of sludge. Based on the above description, research was conducted into the use of waste sulfur from gas extraction results as fertilizer in shallot plants.
The purpose of this research was to understand the effect of biosulfur application of by-products from the gas processing industry on the growth and yield of shallot plants of Lembah palu variety. If the provision of biosulfur has a positive effect, it will help farmers to overcome sulfur deficiency with it, and then it is hoped that it can increase the growth of shallot plants in particular and agriculture in general.
Materials and Methods
Before planting, the soil was mixed with manure and SP-36 fertilizer, and the use of biosulfur as a source of sulfur was adapted to the treatment. Meanwhile, urea and KCl fertilizers were applied twice, namely half of the dose at the 10-day stage and the rest after 35 days. The seeds were planted by removing the top third and using the fingers to make a planting pit, which was then filled and levelled.
As in the greenhouse experiment, urea and KCl fertilizer were given in two stages, namely half after 10 days and the rest given after 35 days. The seeds were planted at a distance of 15 x 20 cm, ie 2/3 of the tubers were planted in the soil. The observational variables used in this experiment were: plant height at the age of 15, 30 and 45 days after planting (dap); Plant dry weight at the age of 30 days after planting and at harvest, by taking some non-sample plants and calculating the dry weight of the tubers after oven at 70oC for 48 hours; The number of tillers per hill was counted after harvest; tuber fresh weight, by weighing plant tubers shortly after harvest;.
Harvesting was done after 90 days after planting which was based on plant conditions where 70-80% of the plants fell and the leaves were yellow. Data were analyzed for variance, if the results of the variance showed a significant effect at the 5% level, then the test was continued using the HSD (Honestly Significant Difference) test.
Results and Discussion
- Greenhouse experiment results
- Field experiment results
After this point, then the role of sulfur became less apparent due to the strength of the autochthonous ability of the plant as a genotypic character to express plant height uniformly which was not affected by environmental factors including the given treatment. Plant height and dry weight: The results of statistical analysis show that plant height at 45 years of age was not affected by the tested fertilizer treatment, but plant dry weight at 30 years of age and at harvest was significantly affected. from the given treatment (Table 3). This means that the role of nitrogen, phosphorus and potassium elements increased the dry weight of the plant when sulfur was added.
The further effect on the formation of other complex compounds indicated on the formation of the dry material is reduced. This gives an indication of the role of sulfur which is additive as long as other nutritional conditions such as N, P and K are sufficient [14] because in principle the absorption level of an element is also determined by other nutritional conditions which will be a limiting factor in the addition of fresh tuber weight. Tuber production data per hectare was obtained from the conversion of the observed result data of plant production per plot.
The results of the HSD test showed that the highest mean yield of onion tubers was obtained from the standard fertilizer and sulfur treatment (P2) which were significantly different from the no fertilizer application treatment (P0) but not significantly different compared to treatment of application of standard sulfur-free fertilizers (P1) and application of standard sulfur-free fertilizers (P3). This gives an indication of the role of sulfur in synergy with other nutrient conditions such as N, P and K in the soil [19]. The inorganic forms of N are ammonium (NH4 +) and nitrate (NO3–), the forms N2 and NO are the forms that are lost as gases due to the denitrification process.
The distribution of tuber sizes showed that the standard fertilizer and sulfur application treatment (P2) resulted in a higher percentage of the number of tubers in the medium category compared to the other treatments. Therefore, it can be said that any addition or application of nutrients through the given treatment results in an increase in the amount of assimilate.
Conclusion
The use of sulfur waste from gas mines results as fertilizer for onion plants of the lembah palu variety. Manuscript Title: The use of sulfur gas mining waste results as fertilizer for lembah palu variety onion plants. In the last paragraph, the use of literature (13) on the use of bio-sulfur and organic materials.
In this field study, there should be information about the layout design or experimental design and the use of statistical data analysis. The title and subsections should be lowercase, the first letter of the most important words. Title: The use of waste sulfur from gas extraction as fertilizer for shallot plants of the lembah palu species.
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Our company does not accept any responsibility for the content of this email, or for the consequences of any action taken based on the information provided, unless this information is subsequently confirmed in writing. RESULTS OF USING THE SULFUR OF GAS MINING WASTE AS FERTILIZER FOR SHALLOT PLANTS.
THE USE OF WASTE SULFUR OF GAS MINING RESULT AS FERTILIZER FOR SHALLOT PLANTS OF
LEMBAH PALU VARIETY
This biosulfur is obtained from the sulfur content (desulfurization) from the gas purification process. This process is carried out to reduce the sulfur content in the gas to the permissible limit, which is below 4 ppm. The research is designed in the form of two experiments, namely in the greenhouse and in the field. The biosulfur fertilizer used was in the form of a semi-solid substance (paste) and had the color of yellowish cream.
For greenhouse experiments, each treatment would be replicated four times so that the number of experimental units was 4 x 4 = 16 experimental units. In the greenhouse experiment, the soil used came from the farmer's shallot planting area which was formerly rice fields. 94 Plant dry weight, number of tillers and tuber fresh weight: The results of the experiment in the greenhouse show that the treatment given did not have a significant effect on the plant dry weight and the number of tillers, but had a significant effect on the fresh weight of shallot tuber (Table 2).
12,477b 10,558a Note: Numbers in the same column followed by the same letters are not significantly different in the HSD 0.05 test in Table 3. 6,659b 4,180a Note: Numbers in the same column followed by the same letters are not significantly different in the HSD 0.05 test. The rate of mineralization of organic nitrogen to inorganic nitrogen is an important factor in determining soil nitrogen availability.
Percent tuber size (tuber type): The results of calculating the percent tuber size in the field experiment based on quality are briefly shown in Table 5. While in the field experiment the effectiveness of sulfur was higher, increasing by 55% of the dry weight of the plant, 36% of the fresh tuber weight and 3% of the tuber production per hectare.
