SU1028653A1 - Inhibiting composition for suppressing nitrification of nitrogen fertilizers - Google Patents

Description

The invention relates to a new bactericidal preparation, in particular to nitrification inhibitors of nitrogen fertilizers. Nitrogen fertilizers in the ammonia and ammc forms are subjected to intensive decomposition by soil bacteria. This process (nitrification leads to the conversion of ammonium fertilizers and urea into easily eroded forms NOj and NO2 f, which entails the loss of part of the crop of agricultural crops. An increase in the effectiveness of nitrogen fertilizers can be achieved by adding nitrification inhibitors. compounds, which are used as nitrification inhibitors, which belong to different classes of organic and inorganic substances, for example, cyanogenic, 2-mercanto-benzothiaool, 2,5-lichlorophenyl succinic, 1-am C-2-thiourea, etc. With the closest to the proposed technical result and the achieved result is an inhibitor based on the compound 2-chloro-6- (three chloromethyl) pyriline. This drug is manufactured by the company Dow Keminl (with the commercial name Nitrapirin The name of the preparative formula of pyrin nitra used in sch; the host is n-sever 2. A disadvantage of the known inhibitor is the complexity of its preparation, the high cost, and also the insufficiently high inhibitory effect. The purpose of the invention is to increase the inhibition ability of the drug. This goal is achieved in that the inhibiting composition for the pressure of nitrifying nitrogen fertilizers based on 2-chloro-b- (trichloroMeTHjJ pyridine) additionally contains 2- (trichloromethyl pyridine, and 5-chloro-2- trichloromethyl) pyridines penta and hexachloro derivatives 2 -Picoline in the following ratio of components, wt.%: 2-Chloro-b- (trichloromethyl) pyridine 83-91 2- (Trichloromethyl. pyyl) pyridine. 0.2-10 5-Chloro-2- (trichloromethyl) pyridine 2-7 Z-Chloro-2- (trichloromethyl) pyridine0, 2-3 Pentachloropropyl 2-picoline 1,5-5 Hexachloropropyl 2-picoline 0.1-0.5 I inhibit preparation This is an example. Hydrochloride 2-picoline is fed continuously to the chlorination reactor at a rate of 55 g / h. Chlorination is carried out at 215 ° C, a residence time of 40 hours and a chlorine feed rate of 100 g / h. of the following composition, wt.%: 2-Chloro-6- (trichloromethyl pyridine91, 2 2-Dtrichloromethyl) pyridine 0.2 5-HLOR-2- (trichloromethyl pyridine 3.3 W-Chlor-2- (trichloromethyl) pyridine 0, 2 Pentachloropicolines 5 , 0 Hexachloropicolines0 1 Example 2. 2-picoline hydrochloride is continuously fed to the chlorination reactor at a rate of 55 g / h. Oroorrvania is carried out at 200 ° C, a residence time of 20 hours and a chlorine feed rate of 100 g / h. After the reaction system has entered the steady state mode, the product of the following composition is taken, May.%: 2-Chloro-b- (Trichloromethyl) pyridium87, 0 2- (Trychloromethyl pyri in3, 7 5-Chloro-2- (trichloromethyl) pyridium7, 0 З -Chlor-2- (trichloromethyl) pyridine 0, 6 Pe tachmorpicolins 1/5 Hexachlor PNKbliny0, 2 Laboratory and field tests of the drug were carried out: to evaluate its effect on various agricultural cultures. with background and with nyt's american drug apirin. Table. 1 shows the data on it ingibirukzh action of the drug on various vegetable species.

T a 6 li c a 1

crop yield from fertilizers, g Priba; crop yield from yngi & 3 pa, g Percentage of crop growth from inhibitor,%

The composition of KOf4noHeHTOB inhibitor, Mar,%: 2-chloro-b-Chtriglesorut hiHridine 83; 2- {trichloromethyl) pyri-. given 10.0; 5-chloro-2-Dtrichloromethyl; pyridine 2,0 J H-chloro-2- (trichloromethyl; pyridium 3,0} foam & hrrprprrydyodnye 2 copies and 1.5; hecke azoresorlide e aqueous 2-Picolv 0.5.

As can be seen from the table. 1, the use of the inhibitor in the most possible; the proposed intervals are:}

Background lP, K-90 kg / ha)

Background N beev.

aVttwaK - 96 kg / ha

Inhibitor 1% from

aota

Intrapyrki 1%

from aeote Contains the components of the inhibitor, wt.%: 2-chloro-b- {trichloromethyl) pyrds 87; 2- (trichloromethyl / pyridine-4,2; 5-asph-2- (trichloromethyl) pyridine 7; 3-chloro-2- (trhlormethyl-pyridine 0.6; pemvi dx ortho-2-picoline 1,0 j hexazoroporio 2-picoline 0.2. ° Dayine of Table 2 shows that the use of the precursor inhibitor

shalo uraakYait of three ovic cultures nd 28-45% 4 Application of amerikas. When the drug raised the crop at 22-28i |. The content of nitrates at the same time n «|; x and 0 is the maximum permissible concentration.

In tab. 2 shows data on the inhibitory effect of the drug on the level of barley urns (grain and on the increase in barley straw weight.

Table 2 .

51 72 86 84

23 39 37 by 28% increased the yield of barley VaepHp) and increased the weight of barley straw, while in comparison with the American drug nitrapirin l mdssa barley straw increased -g. by 13%. . - The positive effect of the proposed inhibitor was also found on herbs of the 3rd year of use, which is presented in Table. 3. Component content, May inhibitor,% J 2-chloro-1-trichloromethyl} pydine 91 i 2- (trichloromethyl) pyridine 0, chloro-2- (trichloromethyl) pyridine 3.5; chlorine-2-- (trichloromethyl pyridine. 0.2 / n-chloro-derivatives of 2-picoline 5.0 / xachloridase aqueous 2-gEIKoline -0.1) The yield of dry weight of herbs using the proposed inhibitor averages 9%, what you than when using amethiacanstane drug Nitrapirnn (6%). The drug was tested with a formulation that contains the lower limit of the proposed, desired composition, May.%: 2g Chloro-b- (trichloromethyl} pyridine, 3 2- (Trichloromethyl pyridine 20.3 5 Chlorine -2- (trichloromethyl; PIRIDIN7, 9

TyblitseZ Z-Chlor-2- {trichloromethyl Miri-; Reediv 0.7 Pentachloropicolins5, 7 Rheachloropicolins3, 1 When this composition is tested on grass, the yield increase is only 2.2 c / ha (55.3; 57.5 c / ha), which is significantly worse compared to nitrapirin ( 6.4 and 5.7 t / ha). Thus, from the examples given in the laboratory and field tests of the proposed nitrification inhibitor, it can be seen that it significantly increases the yield of agricultural crops, the degree of nitrogen utilization of fertilizers, and contributes to a decrease in the concentration of nitrates in the soil, i.e. slows down the transition of ammonium and amide forms of nitrogen to nitrate.

Claims (3)

INHIBITING COMPOSITION FOR SUPPRESSING NITRIFICATION OF NITROGEN FERTILIZERS based on 2-chloro-6- (trichloromethyl) pyridine, vol. In addition, in order to increase the inhibitory ability, it additionally contains 2- (trichloromethyl) pyridine, 3- and 5-chloro ^ 2- (trichloromethyl) pyridines, penta- and hexachloromethyl derivatives of 2-picoline in the following ratio. wt.%: 2-Chloro-b- (trichloromethyl) pyridine 2- (Trichloromethyl (pyridine 5-Chloro-2- (trichloromethyl) pyridine 3- Chloro-2- (tri.chloromethyl) py-iridine Pentachloro derivatives of 2-picolin Hexachloropro derivatives of 2-picoline components, e EO gl