Влияние применения гербицидов против сорных растений на урожайность озимой пшеницы в староорошаемых землях Сурхандарьинской области

Аннотация

Subjects of research: Old irrigated zone of saline soil, the sort of Croshka winter wheat of Croshka, ear and two portionable weed crops, herbicides Puma super 7,5 %, Grunstar 75 %. Purpose of work: Working out agrotechnology of struggling against widespreading ear and twoportionable weed crops on sowing of winter wheat by applying of herbicides in conditions of old irrigated lands of Surhandarya region. Methods of research: Investigations were done by the methods of “Gossortoset” (1971); B.A.Dospehov (1985) “The methods of field experiments” and “State tests of herbicides applied against weeds on the fields of agricultural crops” (1994). The results obtained and their novelty: For the First time in conditions of old irrigated lands of Surhandarya region is worked out the agrotechnology of struggling against ear and two portionable weeds on sowing of winter wheat by the way of common application of herbicides Puma super (1 Lh) and Grunstar (15 g.h) which promoted increasing the crop capacity and wheat quality. Practical value: It is recommended and applied in production the method of common applying of herbicides Puma super (1 l.h) against ear, Grunstar (15 g.h) against two portionable weed crops on sowing of winter wheat in conditions of old irrigated lands of Surhandarya region; Degree of embed and economic effectivity: Common application of herbicides Puma super (1 l.h) against ear, Grunstar (15 g.h) against two portionable weed crops on sowing of winter wheat in 2006-2007 are applied in Angors, Bandihan, Jarkurgans, Kizirick, Muzrabad, Termez, Sherabad regions of Surhandarya in the area of 20,6 thousand hectares. Common applying of herbicides against ear and two portionable weed crops on sowing of winter wheat on the 20th of march promoted increasing wheat in 23,3-25,4 centner from hectare in comparison with control variant of experiment where herbicides were not applied against weed crops. Pure profit is 126929-199754 sum /hectare, profitability is 23,1-43,7 %. Common applying of these herbicides on the 10th of april promoted to increase wheat yirld 29,4-30,7 c/h from hectare. Pure profit is 150922-244471 sums from hectare and profitability for 27,6-53,5 %. Field of application: In irrigated saline soils in farms which specialized in wheat production.