ИЗСЛЕДВАНИЯ ВЪРХУ ПОЛСКИТЕ КУЛТУРИ
издание на
ДОБРУДЖАНСКИ ЗЕМЕДЕЛСКИ ИНСТИТУТ
гр. Генерал Тошево
 

търсене по автор

НАЧАЛО
Условия за публикуване
Редакционна колегия
Изисквания към авторите
Етични правила
Том XIV, 2021
Книжка 1
Книжка 2-3-4
1 статия   9 - 16
2 статия   17 - 26
3 статия   27 - 42
4 статия   43 - 56
5 статия   57 - 64
6 статия   65 - 72
7 статия   73 - 90
8 статия   91 - 98
9 статия   99 - 106
10 статия   107 - 120
11 статия   121 - 126
12 статия   127 - 136
13 статия   137 - 142
Том XIII, 2020
Том XII, 2019
Том XI, 2018
Том X, 2016
Том IX, 2014
Том VIII, 2012
Том VII, 2011
Том VI, 2010
Том V, 2009
Том IV, 2007
Том III, 2006
Том II, 2005
Том I, 2004
Публикационнен процес
Статия
 Пълна версия ORIGINAL PAPER
 
Effect of a set of herbicides and the dates of their application to Triticum aestivum L. Cultivars on the content and yield of raw protein depending on the date of sowing
  Margarita Nankova • Georgi Sabev • Zornitsa Petrova • Genoveva Bankova - Atanassova  
Dobrudzha Agricultural Institute – General Toshevo, 9521, General Toshevo, Bulgaria
 
     Резюме
 
The investigation was carried out at DAI – General Toshevo during 2012 – 2014 in four-field crop rotation (wheat-maize-wheat-sunflower). Cultivars Aglika and Enola were sown on two dates – optimal (1st – 15th October) and late (after 20th November). The following set of herbicides was tested: Derby super VG – 3,3 g/da; Palace 75WG + oil – 25+100 g/ml/da; Granstar 75DF – 1,5 g/da; Lintur 70VG – 15 g/da; Husar Max ОD – 100 ml/da; Secator ОD – 10 ml/da and Mustang 306,25СК – 80 ml/da. The herbicides were applied on three dates: І date А – stage 29 according to Zadoks ; ІІ date B – stage 32 according to Zadoks and ІІІ date С – stage 37 according to Zadoks. The experiment included two check variants К1 – weed-free check (manually weeded from the emergence of the first weeds till heading of wheat), and К2 (nil) – a check infested till harvesting of the crop. A high level of significance was determined for the tested herbicides on the values of raw protein in grain and protein yield from the tested cultivars under the conditions of the experiment. The years of investigation had highest effect on the values of the tested characteristics. Best results were obtained in 2012. At the late date of herbicide application, the amount of protein decreased in both cultivars. Averaged for the investigated period, the size of protein yield of cultivar Enola was with 18.7 % higher than the yield of cultivar Aglika. In all three years of the investigation, highest yield of raw protein was obtained from the manually weed-free check (К1) and lowest – from the infested check (К2). Averaged for the tested variants of the trial, only after the application of the herbicides Derby super VG and Secator OD the raw protein yield remained at the level of the weed-free check (К1). There was a strong positive correlation of grain yield with raw protein yield. Averaged for the period of investigation, the sowing date of cultivar Aglika did not show significant effect on the values of the correlation coefficients. In cultivar Enola, the late sowing date lead to high increase of the correlation. This tendency was best expressed in harvest year 2014 (r=,875**).

Key words: Wheat, Cultivars, Dates of sowing, Herbicides, Stages of application