Residual effect of organic fertilization on radish production

Abstract

This research aimed to evaluate the residual effect of doses of organic compost on the radish production, as well as its effect on soil chemical properties. Experiments were conducted in two areas ("low" and "high" soil fertility). Prior to this, these areas were first used to evaluate the influence of organic compost doses on endive production. After harvesting endive, radish seeds were sown into the same plots used for endive to evaluate the residual effect. The six treatments consisted of organic compost doses (0, 35, 70, 105, 140 and 175 t ha -1 ), evaluated in a complete block experimental design, with four replications. Vegetative characteristics of radish plants (shoot, root and total fresh and dry matter weight, plant height and root diameter) and soil characteristics (macronutrient content, pH, H+Al, organic matter, sum of bases, cation exchange capacity and base saturation) in two dates (11 days after the endive transplant and at the end of the radish cycle) were evaluated. No significant difference was observed for all doses of organic compost in the "low" soil fertility area, obtaining only non-commercial roots (average fresh weight of 5.01 g per root). In the "high" soil fertility area, the higher the organic compost doses, the higher the values of most vegetatitve characteristics of radish plants and the chemical properties of the soil in both dates. For root fresh weight, the values ranged from 4.63 to 9.15 g in the control without organic compost and in the highest dose, respectively. In "high" soil fertility area, only K content in soil has not remained high for all organic compost doses, and the values ranged from 2.8 and 4.5 mmol c dm -3 , in control without organic compost and in the highest dose, respectively. The residual effect of organic compost was confirmed by the increasing on the radish production in initial "high"soil fertility area.

Organic Manure Coupled with Inorganic Fertilizer: An Approach for the Sustainable Production of Rice by Improving Soil Properties and Nitrogen Use Efficiency

“…A possible explanation for this that is the inspiring effect of both mineral and organic manure fertilizers on root morphology is probably linked to soil physicochemical properties (sufficient nutrient availability, maintained soil moisture content) (Tables 4 and 5), that delay root senescence due to the slow and regular release of nutrients from manure across growth, thus ultimately improving root growth and activity in the present study. Similarly, a previous study reported that manure fertilization can enhance soil physicochemical properties and the conservation of nutrients and promote plant growth by improving root morphological traits [70].…”

“…N recovery was higher in the late season than early under combined CM or PM with urea in the present study. This may be due to organic manure fertilization having a residual effect on later crops [70].…”

“…As an essential part of the plant organs, rice roots are involved in gaining water and nutrients, synthesizing organic acids, amino acids, and plant hormones [70]. Root morphological and physiological features are closely associated with soil nitrogen acquisition and the development of plants [71][72][73].…”

Vegetative Development of Radish Seedlings in Different Organic Substrates

“…Nevertheless, the use of different substrates in the seedlings production still needs studies, as observed by Oliveira et al [25], who did not find significant results for the use of an organomineral fertilizer plus soil as the substrate in the production of radish seedlings. Linhares et al [26] studied doses of jitirana (5.4; 8.8; 12.2 and 15.6 t ha-1 on dry basis) and decomposition times (0, 10, 20 and 30 days before sowing), concluding that the residual effect of the higher dose (15.6 t ha-1) at the longest period (30 days) was the one that provided the greatest number of leaves (7.5 leaves) and root diameter (4.38 cm) on radish [27]. Regarding the influence of the packing type in the fresh mass of radish aerial part, packing 1 provided the highest averages for substrates S1, S4 and S3 (0.56, 0.96 and 0.75 g seedling -1 , respectively), differing from S2 (0.15 g seedling -1 ).…”

Lodo de esgoto como matriz orgânica na formulação de fertilizante organomineral para a cultura da soja

“…Entretanto, não há clareza em relação aos possíveis efeitos sinérgicos ou inibitórios da mistura da fração orgânica com fertilizantes minerais bem como a participação e influência de cada um desses compartimentos no fornecimento adequado de nutrientes para as plantas. (CUNHA et al, 2015;LYNCH, 2015;LANNA et al, 2018).…”