SU1171449A1 - Slow-acting nitrogen fertilizer - Google Patents

Abstract

MEDICINAL ACTION NITROGEN FERTILIZER containing oxamide and sul1 d) itone bard concentrate, about 1 l. so that, in order to improve agrochemical properties. fertilizer by enhancing the absorption of nutrients by plants during the whole vegetation transition, it additionally contains ammonium molybdate in the following ratio of components, wt.%: Sulfite-bard concentrate. 5-15 Ammonium molybdate 0.1-0.5 S Oxamide Ostal (L

Description

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This invention relates to a techno login of fertilizer production and relates to slow-acting nitrogen fertilizers based on oxamide.

Nitrogen fertilizer is known, containing oxamide in combination with anhydrous or hydrated calcium sulfate (gypsum) in a 1: 1 ratio in granular form lj.

The disadvantage of fertilizer is the lack of an extended period of fertilizer, reduced nitrogen and low mechanical strength of the granules. ,

The closest to the offer is a fertilizer containing granulated oxamide and 5-15% by weight of sulphite-bard concentrate | 2j.

A disadvantage of the known fertilizer is that oxamide mixed with sulphite-bard and concentrate does not contain a sufficient amount of assimilable nutrient elements that affect the growth and productivity of plants during the entire growing season.

The aim of the invention is to increase the agrochemical properties of the fertilizer by enhancing the absorption of nutrients by the plants throughout the entire growing season.

The goal is achieved by a slow-acting nitrogen fertilizer containing oxamide and sulfite bard concentrate, which additionally contains ammonium molybdate in the following ratio of components, wt.%:

Sulfite-bard Noah

concentrate5-15

Ammonium molybdate 0.1-0.5

Oxamide Else

The introduction of ammonium molybdate into a slow-acting oxamide-based fertilizer in combination with sulphite-bard concentrate promotes the absorption of molybdenum by plants during the entire growing season, i.e. during the complete decomposition of the main component of the fertilizer, oxamide; The content of mobile forms of nitrogen does not increase when the specified fertilizer is applied to the soil; however, the presence of ammonium molybdate in it significantly enhances the physiological process such as the absorption of nitrogen and other mineral elements by plants

nutrition, as evidenced by the data on the effect of fertilizer on rice uptake of nitrogen, phosphorus and potassium in the rice table 1.

The introduction of ammonium molybdate in an amount of less than 0.1 wt.% Is impractical, since its effect on the physiological process of the absorption of mineral nutrients by plants is insignificant and comparable to the effect of fertilizer not containing ammonium molybdate.

Going beyond the upper limit of the content of ammonium molybdate in a known fertilizer (0.5 wt.%) Leads, despite improved physiological parameters, to unproductive losses of molybdenum, which is economically disadvantageous. This reduces the physicomechanical properties of granular fertilizer.

Example. A mixture of powdered oxamide, 50% aqueous solution of sulfite-bard concentrate (5-15 wt.%) And (0.1-0.5 wt.%) Ammonium molybdate is mixed until a homogeneous pasty mass is obtained. To obtain granules, this mass is forced through a spinneret with apertures of diameter 2-10 s. After extrusion, the granules are dried for 1.5 hours at 373 K. Composting is used to determine the decomposition rate of oxamide in the soil and the dissolution rate of molybdenum in the soil at 30t K and a soil moisture of 60% of the soil capillary. Suspension of air-dry soil for composting - 0.1 kg. Fertilizers were applied in such an amount that the mass of nitrogen in the sample was 1.0 vtlO kg; with an interval of 2 weeks, the degree of decomposition of oxamide and dissolution of molybdenum in the soil was determined. The repetition of the experience is fourfold.

Variants of the composition of slow-acting fertilizer and its effectiveness are given in Table. 2

The fertilizer was tested for two years (1980–1981,) when growing Krasnodar-424 rice under field conditions under flooding. From the experimental data, it follows that the yield of rice using the oxamide + sulfite3 but bard concentrate fertilizer + molybdate monopot is 10–13% compared to 11714494 am — using oxamide 4 sulfite bard fertilizer. Table

Table 2

Claims (1)

SLOW-ACTING NITROGEN FERTILIZER, containing oxamide and sulphite-mard concentrate, about t and -. characterized in that, in order to increase the agrochemical properties of fertilizer by enhancing the absorption of nutrients by plants during the entire transition of the growing season, it additionally contains ammonium molybdate in the following components, wt.%: Bardic sulphite concentrate Ammonium molybdate Oxamide ω the ratio 5-15 0.1-0.5 Else 1 1171449