Effect of some micro-organic fertilizers on growth and spear yield of Asparagus officinalis L. planted in Quy Nhon city, Binh Dinh province
Abstract
Asparagus officinalis L. which is high in nutrient content and bioactive compounds was cultured more than 2000 years ago and planted in more than 60 countries. This plant was imported into Vietnam in the 1960s and grown in many provinces, mainly in Ninh Thuan province. Toward the safe and sustainable production of asparagus, the use of micro-organic fertilizer (MOF) is an effective solution. The experiment was designed to evaluate the effect of some MOFs on growth, spear yield and some quality indicators of asparagus spear. The experiment was laid out as a randomized complete block design with three replications of 5 treatments (4 different MOFs: Tribat T-MB, Bokashi-Trichoderma + TE, Que Lam 01, Song Gianh and control). The initial results showed that adding MOFs, especially Song Gianh MOF, increased stem height, chlorophyll content, stem diameter, number of stems (7.62 stems.crown -1 ), number of harvested spears (7.9 spears.crown -1 ), spear diameter (8.8mm), spear weight (12.55g. spear -1 ), vitamin C content (341 mg.100g -1 ), spear yield in 1 harvest month was 1.6 tons.ha -1 .month -1 . Therefore, the Song Gianh micro-organic fertilizer should be initially suitable to asparagus cultivation in the local conditions.