ايط معررف كودهاى شبهبايى و بيولوزيكت 􀁌 ارزيابى رشد و عطكود ينبه در رقابت با علف هاى هوز در (Panjabi)

The Assessment of ١١ eed Competition Effect on Gro١vth and Yield of Cotton by Means of Chemical and Biological Fertilizers. (English)

A field experiment has been conducted between 2014 and 2015 to evaluate and compare the effects of N and p chemical fertilizers with biological N and p fertilizers on compettion between cotton and weeds. The experiment has been with split plot amangement in a randomized complete block design with three replications. The main plots include two levels of weed management practices, including weed free and weedy check. Sub plots have had five integrated applications of biological and chemical fertilizers: 1- Control (Without fertilizer), 2- Urea t Triplesupeiphosphate (TSP), 3- Nitroxin + 50% urea t 100% TSP, 4-100% urea + Baivar2 + 50% TSP, and 5- Nitroxin + Barvar2 t 50% urea + 50% TSP. In the first year, weed control has increased LAI and number of boll per plant to 34% and 22%, respectively, and cotton yield has risen by 67% in the first year and 50% in the second. Fertilizer treatments have had a significant effect on stem length, LAI, number of sympodial blanches and boll per plant, and yield of cotton. Linder weed interference condition, the use of chemical fertilizers alone reduces cotton growth and yield as it increases competitive ability of weeds. However, reducing the urea consumption by half and replacing it with nitroxin, increases cotton yield by 61%, compared to the chemical fertilizer reatrnent, due to increasing number of boll per plant. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Crops Improvement / Majallah-i Bih/zirā̒ī-i Kishāvarzī is the property of University of Tehran and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)