Search or add a thesis

Advanced Search (Beta)
Home > Competitive Interactions of Wild Oat Avena Fatua L. and Wheat Triticum Aestivum L. under Two Different Agroecological Conditions in Khyber Pakhtunkhwa

Competitive Interactions of Wild Oat Avena Fatua L. and Wheat Triticum Aestivum L. under Two Different Agroecological Conditions in Khyber Pakhtunkhwa

Thesis Info

Access Option

External Link

Author

Kulsoom, Umm-E-

Program

PhD

Institute

The University of Agriculture

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2016

Thesis Completion Status

Completed

Subject

Natural Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/7437/1/KULSOOM%20PHD%20THESIS.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725773393

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


Crop-weed competition and interactions are the focus of many researchers to make weed management decision accurate and economical. Therefore pot and field studies were conducted in two consecutive years (2012-13 and 2013-14) at two different locations viz Peshawar (34.0167° N, 71.5833° E) and Chitral (35° 50'' 46 N, 71° 47'' 9 E) of Khyber Pakhtunkhwa (KPK) province, Pakistan. The aims of the experiments were to determine the competitive ability of wild oat (Avena fatua L.) with wheat (Triticum aestivum L) at two ecologically different locations and the possible effects on quantity and quality of wheat grains. In field studies, the experiment was laid out in randomized complete block design (additive design) with three replications in which the seed rate of wheat (var. Ata-Habib) was 125 kg ha-1 while wild oat was sown at 0, 5, 10, 15, 20, 25, 30, 35, and 40 plants m-2. All other weeds were removed manually. Field data showed that number of spikes m-2, number of grains spike-1, and biological yield of wheat during year 1 and plant height and spike length of wheat during year 2 were significantly higher at Peshawar when compared with Chitral. However, the grain yield of wheat was statistically similar at both the locations. The effects of different wild oat densities during both the years were prominent by significantly decreasing the grain and biological yield related variables of wheat. During both the years, the number of tillers and spikes in wild oat-free plots were significantly higher than wild oat infested plots; depending on density. Wild oat density above 5 m-2 resulted in decreasing the wheat yield components. These results showed that wild oat start competition at initial stage of the wheat. All other yield related variables of wheat were decreased with the increasing density of wild oat, indicated that wild oat compete with wheat throughout the crop season. The grain yield losses in wheat ranged from 2-35% during year 1 and 1-21% during year 2 at wild oat density of 5-40 plants m-2. The interaction of location and treatments on biological and grain yield was significant; showing that certain environmental factors favoured the wheat. Like wheat, wild oat biomass and plant height was also higher at Peshawar as compared to Chitral. The quality variables of wheat grains showed that protein content in wheat grains was decreased at higher densities of wild oat. During year 2, the gluten content in Chitral was decreased with increase in density of wild oat. The replacement series experiment showed that the relative yield total (RYT) was vi close to 1; indicating that both species are equally competitive although wheat was relatively dominant species (under field conditions) in mixtures. The same experiments (additive and replacement series) were conducted in pots. The density of wheat was kept constant (10 plants pot-1) while the densities of A. fatua were 0, 1, 2, 3, 4, 5, 6, 7 and 8 plants pot-1. Biomass of wheat and wild oat (pot-1) were recorded. While in replacement series experiment, the same protocol was used except, that there were eleven treatments and the total density of crop and weed (wheat and wild oat) in each pot was constant, but species grown together were varied from 0 to 100%. Plants established in a mixture with proportions of 10:00, 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8, 1:9 and 0:10 (wheat : wild oat) plants pot-1. Pot experiments showed that wheat biomass was similar during both years while wild oat biomass was significantly higher. Wheat and wild oat biomass was decreased (R2 value of 96 %) for wheat and wild oat (R2 value of 94 %) in quadratic fashion. Relative yield total (RYT) showed that both the species are competitive where wheat was dominant in term of biomass production under the mentioned cultural practices. The regression equation demonstrated a good fit to the data with R2 values of 89% in year 1 as compared 96% during year 2. However, wild oat gave higher RYT in pots as compared to field conditions. In light of the present studies, it is concluded that presence of wild oat decreased all yield and biological yield related variables of wheat. Because early stage and later stage related variables of wheat were decreased, suggested that wild oat competes with wheat throughout the crop season. Apart from these, the quality variables of wheat; especially protein content is decreased due to presence of wild oat at higher density. Hence management of wild oat at any location needs to be implemented to get higher yield of wheat grains with good protein content. Due to morphological similarity of wild oat with wheat, this weed proved strong competitor. Therefore, it is suggested that wild oat needs to be controlled in wheat even at density of less than 5 plants m-2.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

53. An-Najm/The Star

53. An-Najm/The Star

I/We begin by the Blessed Name of Allah

The Immensely Merciful to all, The Infinitely Compassionate to everyone.

53:01
a. By the star when it sets.

53:02
a. Your companion who has lived amongst you for forty years is neither strayed nor is he deluded,
53:03
a. nor does he speak out of his own personal desire with regard to what he recites to you of The Qur’an,
53:04
a. that which he conveys to you - The Qur’an - it is nothing but a Divine Revelation, being
revealed on to him.

53:05
a. Taught to him by the One of Awesome in Power,

53:06
a. Full of wisdom.
b. HE stood poised,

53:07
a. while HE was on the highest part of the horizon.

53:08
a. Then HE drew near and came close,

53:09
a. so much so that it was left only a space of the strings of two bows – facing each other, surrounding him in all directions - or even closer than that.
53:10
a. So HE revealed on to HIS Servant Muhammad whatever HE revealed.

53:11
a. The Prophet’s heart did not lie about what it saw.
b. He neither perceived it as an illusion nor was it a hallucination.
c. It was a reality.

53:12
a. Are you, then, going to argue with him what he saw?

53:13
a. And, certainly, he saw HIM yet again at another time, too,

53:14
a. by the Lote Tree of the Extremity,

53:15
a. close to which is the...

اسلام اور مغرب کے باہمی اختلافات

The paper endeavors to shed some light on the relationship between Islamic World and the West especially America. Using narative methodology, we examine the concept of clash of civilisation aggressively followed by the Western Philosophers and thinkers and antegnoistic approach towards Muslims and Islamic Way of life, the gulf between the two is widening to an alarming extent. Looking, at this scenario, the paper suggests that emphasis should be laid on inter-cultural complementarity, reframe differences and pursue the cause of peaceful coexistence among the nations of the world.

Exploring Grade 10 Students English Reading Comprehension Performance in Gilgit City: Comparison Across Gender, School System and Parental Qualification

Comprehension is the basic purpose of reading. The present study intends to explore the English reading comprehension proficiency of grade 10 students of Gilgit city specifically in terms of comparisons across gender, school system and parental qualification. The reading comprehension test developed by Arellano (2013) was adapted for the study in order to measure students’ level of comprehension. The test consisted of twenty-six items followed by four domains of reading comprehension – getting general information, getting specific information, understanding textual structure and deducing meaning from context. The overall reliability of the tool was 0.88. The test was administered to a stratified random sample of 181 secondary school students enrolled for the academic year of 2014 to 2015. The selected sample consisted of male (n=103) and female (n=78) students from private (n=4) and public (n=4) schools, respectively. Inferential analysis was carried out to determine the statistical level of difference between the groups and the hypothesis was tested at the 0.05 level of significance. On the whole, students’ level of attainment in the comprehension test was (M= 26.10%). Moreover, the study found (both on overall English reading comprehension as well as at subscale level) a significant level of difference across gender, school system and parental qualification. Girls, private school students and children of educated parents performed relatively better in English reading comprehension than each of their counterparts, respectively.