Understanding the Competitive Effects of Blessed Milkthistle Densities on Wheat

IF 0.8 Q3 Agricultural and Biological Sciences

Planta Daninha Pub Date : 2020-01-01 DOI:10.1590/s0100-83582020380100010

A. Rehman, R. Qamar, M. Safdar, H. Javeed, M. Shehzad, M. Ali, M. Asif, Z. H. Tarar, A. Ahmed, M. Jamil

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引用次数: 2

Abstract

ABSTRACT: Weed-induced yield loss in wheat crop is a great threat to food security in Pakistan. A comprehensive understanding of weed-crop competition is very important to develop sustainable and cost-effective weed management. For this purpose, two-year field studies were conducted to determine the effect of different blessed milkthistle densities on the phenology and yield of wheat crop in a rice-wheat cropping scheme in Sargodha, Pakistan during 2013-2014 and 2014-2015. The experiment comprised seven treatments: control (weed free), weedy check (weedy without any control) and blessed milkthistle densities of 5, 10, 15, 20 and 25 plants m-2. In response to increasing weed density, a gradual reduction in yield and yield-related traits of wheat was noted. Compared to the weed-free control, a significant reduction in number of productive tillers m-2 (20% and 18%), plant height (15% and 18%), spike length (19% and 26%), number of grains spike-1 (23% and 26%), 1000 grain weight (28% and 28%), grain (29% and 30%) and biological (20% and 24%) yields of wheat occurred at and beyond blessed milkthistle density of 5 plants m-2 during 2013-2014 and 2014-2015 respectively. It can be concluded that blessed milkthistle weed must be controlled if its population density reaches 5 plants m-2 in order to avoid significant grain yield losses in wheat.

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了解乳蓟草密度对小麦的竞争效应

摘要:杂草导致的小麦减产严重威胁着巴基斯坦的粮食安全。全面了解杂草与作物之间的竞争，对于制定可持续的、具有成本效益的杂草管理非常重要。为此，在2013-2014年和2014-2015年期间，在巴基斯坦Sargodha进行了为期两年的实地研究，以确定不同乳泻草密度对水稻-小麦种植方案小麦物候和产量的影响。试验包括7个处理:控制(无杂草)、杂草抑制(杂草无任何控制)和加筋乳蓟草密度分别为5、10、15、20和25株m-2。随着杂草密度的增加，小麦的产量和产量相关性状逐渐降低。与无草对照相比，2013-2014年和2014-2015年，在5株m-2乳蓟草密度及以上，小麦的有效分蘖数(20%和18%)、株高(15%和18%)、穗长(19%和26%)、穗数(23%和26%)、千粒重(28%和28%)、籽粒(29%和30%)和生物产量(20%和24%)分别显著降低。综上所述，为避免小麦籽粒产量的显著损失，必须控制乳蓟草的种群密度达到5株m-2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Planta Daninha Agricultural and Biological Sciences-Plant Science

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Planta Daninha is a scientific journal published by the Brazilian Society of Weed Science (SBCPD - Sociedade Brasileira da Ciência das Plantas Daninhas). Papers submitted for publication must be sent through an electronic system, on http://www.scielo.br/pd. Works may be written in Portuguese, English, or Spanish, and will be accepted after being reviewed and approved by the Editorial Board. Only papers that have not been published or submitted for publication in other media will be accepted. Articles in Portuguese will be translated to English after being properly corrected and authorized by the authors. Planta Daninha has with goal to publish genuine technical-scientific papers and literature reviews from a critical perspective on Biology, weed management, and related topics.