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
 
Influence of mineral fertilization on cotton productivity
  Stefka Stefanova-Dobreva1 • Angelina Muhova1 • Bogdan Bonchev2  

1 Field Crops Institute, 2 Georgi Dimitrov Blvd, 6200 Chirpan, Bulgaria

2 Institute of plant genetic resources “K. Malkov”, 2 Drujba str., 4122 Sadovo, Bulgaria

 
     Резюме
 
The aim of the study was to determine the effect of increasing rates of the main nutrients N and P under cotton productivity. In 1966, at the Field Crops Institute-Chirpan, a stationary fertilizer experiment was set up in a two-field crop rotation - cotton-durum wheat. The data represent the period 2014-2018. The Darmi variety was tested under non-irrigated conditions. In the study were tasted 40, 80, 120 and 160 kg N ha, and 40 and 80 kg P ha. For control was adopted N0P0. Fertilization with N120P80 had the strongest effect on the height of cotton plants (47.0% above control). The highest boll weight was reported under the influence of the N80P80 rate (28.34% above the control). Yield and number harvested bolls per plant were increased the most by the high fertilizer combination N160P80 (152.2% and 55.42% above the control, respectively). The strongest and most significant correlation was observed between plant height and boll weight (0.693 ***).

Key words: Cotton, Nitrogen, Phosphorus, Fertilization