Effects of the onion residue compost as an organic fertilizer in a vegetable culture in the Lower Valley of the Rio Negro

Abstract

Purpose Farming production in the lower part of Río Negro Valley (Argentina) has increased considerably during recent years, causing soil degradation and, specifically, decreasing the organic matter contents. This fact requires recovery measures, as organic amendments for soils, to improve its quality. The marked objectives for the present research is to evaluate compost as organic fertilizer, based on a mix of onion waste and bovine manure. Methods The experiment was carried out in a completely randomized design, involving five treatments and one control, with ten copies of each one. Tests were performed in a greenhouse, using flowerpots and experimental plots, in a typical soil of the region (Aridisol), pH 8.3 and 2.2% of organic matter, mixed with different compost dosages (20, 40, ) and the chemical treatment, Urea (0.26 Mg ha -1 ). A horticultural farming of 1 lettuce was sowed (Lactuca sativa). A conventional handling was carried out for the whole cultivation period, and at the end was harvested. Ten plants per plot were taken and were determined total fresh weight, aerial part fresh weight, root part fresh eight. In the dry controls total dry weight, aerial dry weight and root dry weight was determined. Results Results show, with an error (p \ 0.05), significant differences in the fresh weight per plant calculated, between treatments and control; a noticeably greater effect can be observed in the treatments with 6 and 8 kg m -2 compost amending and urea treatment. There is no evidence of the existence of significant differences (p \ 0.05) between treatments and control, according to the values obtained for root size as well as aerial dry weight and root dry matter. Conclusions It can be concluded that the addition of organic fertilizer to soils, has positive effect on the Fresh weight of the plant, recommending the use of doses of 6 kg m -2 while the dose of 8 kg m -2 could replace the use of chemical fertilizers such as Urea.

A field study on the effect of organic soil conditioners with different placements on dry matter and yield of tomato (Lycopersicon esculentum L.)

“…This amount did not differ compared with other treatments with CM, different rates, and different application methods. This finding is relevant to that of Pellejero et al (2017) on lettuce, in which treatments with higher compost dosage showed higher root dry weight as well. This also included treatments with other fertilizers with high rate and broadcast application.…”

The Impact of Organic Fertilizer Produced with Vegetable Residues in Lettuce (Lactuca sativa L.) Cultivation and Antioxidant Activity

“…This practice has been widely used in many countries with benefits for soil physicochemical and biological properties, increasing fertility and higher nutrient availability such as nitrogen (N), phosphorus (P), potassium. (K), calcium (Ca), and iron (Fe) [13].…”

“…The intensive use of soil, specifically those focused on vegetable production, causes a reduction in organic material and nutrients and has been identified as one of the most important threats to its quality [13]. Thus, the purpose of this study was to evaluate the influence of organic fertilizers produced from vegetable residues on Crespa lettuce cultivation.…”

Ação de fertilizante orgânico de resíduos vegetais em condições de estresse abiótico no teor de fenólicos totais de alfaces (lactuca sativa)

“…O conjunto de fatores (teor de água, compostos orgânicos e compostos antioxidantes, influenciaram na resposta positiva do solo adicionado de FFH 3% quando comparados ao solo sem adição de fertilizante natural. O alto teor de umidade, alta CRa do solo adicionado de FCC, sugerem alta complexidade dos biopolímeros deste fertilizante não permitindo crescimento das folhas de alface mesmo apresentando alta atividade microbiana, quando comparado ao solo sem adição de conservantes (Pellejero, Miglierina, Aschkar, Turcato, & Jiménez-Ballesta, 2017) .…”