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Esponse of Maize to Phosphorus Seed Priming

Thesis Info

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Author

Miraj, Ghazal

Program

PhD

Institute

The University of Agriculture

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2012

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2676/1/2705S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726088594

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A series of laboratory and field experiments were conducted to study the effect of phosphorus seed priming on emergence, seedling growth and yield of Maize (Zea mays L.) cv. Azam at the University of Agriculture, Peshawar, Agricultural Research Institute, Tarnab and Bangor University, Wales, UK during 2008 and 2009. Different sources of phosphorus (1 % P) including KH 2 PO 4 , SSP and DAP along with amended solutions of SSP (20 g l -1 KOH, 15 g l -1 NaOH and 12.5 g l -1 Na 2 CO 3 ) were used as priming treatments. Water primed and dry seed were used as control in the experiments. Seeds were primed for 16 h and then air- dried were sown in the mini plot and field for the seedling growth parameters and yield components. Seedlings from mini plot and field were cut at 21 days old stage. Laboratory tests were carried out on the P primed seeds labeled with P 33 to determine the amount of nutrient introgressed into and onto the seed. Germination test of water, P primed and non-primed seed was carried out in low P soil. P 33 labeled primed seeds were planted in tube pots to assess the P mobilization in seedling at three growth stages (7 days after emergence, 14 days after emergence and 21 days after emergence). Phosphorus priming of maize seed for 16 h reduced the time for germination. Three weeks old mini plot and field seedling grown from water, P or P amended solution primed seeds showed higher vigor than unprimed seeds as reflected in fresh and dry shoot weights, fresh shoot height and P shoot content as compared with non-primed seedlings. Additionally the nutrient uptake of seedling was increased due to 1 % P solution priming with KH 2 PO 4 . The seeds primed with P 33 labeled solutions (KH 2 PO 4 ,SSP, and SSP+20 g l -1 KOH) were also used to study the P mobilization in the seedling on three different stages (7 DAE, 14 DAE and 21 DAE) using tube pots. Leaf and root P data showed that phosphorus was effectively mobilized inside the plant due to priming on low P soil and hence helped in reducing the P deficiency in maize to some extent. Data for nutrient introgression by seed revealed that maize seed had introgressed significant amount of P through priming. Also that surface washing of the primed seed only removed 29 % of P from the seed coat. Yield parameters showed positive response to P priming as reflected in cobs yield (126% increased over control), grain and straw yields (85 % and 94% increase over control, respectively), thousand grain weight and P content of grain. Priming maize with SSP + 20 g l -1 KOH showed almost same effect as of KH 2 PO 4 . It was concluded that priming maize with SSP + 20 g l -1 KOH would be effective alternative of KH 2 PO 4 as SSP is generally used fertilizer and KOH is also easily available. This would be easier and cheaper source of priming for resource-poor farmers.
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Preface

Almighty Allah revealed the Holy Qur’an for guidance of the mankind. This guidance cannot be acquired without pondering over the meanings of this book. Different scholars dedicated their lives for understanding and then spreading the message of the Almighty Allah. This book is a study of the work on translations and tafasīr of Holy Qur’an. In Sub-Continent, a large number of religious scholars dedicated themselves for the service of Holy Qur’an.  Their vision was broad and they elaborated meanings of the Holy Qur’an according to their own mental approach They were appreciated and criticized by scholars of different sects of the society. There is a dire need to understand and spread the teachings of the Holy book. Hopefully this work will encourage the readers to be aware of the research of theologians. Shāh Walī Allāh is the most important religious figure of Sub-Continent. He and his sons played very important role in spreading the message of Qur’an. Brief services of this family are elaborated in this book. Scholars of Sindh have contributed in writing translations and commentaries of Holy Qur’an. Some of their contributions are highlighted. The reader will also find introduction of well-known translations and tafasīr of the 20th century. But this introduction is restricted to the Sub-continent. Through this book. the writer wants only to motivate people for learning the Holy Book. It is not claimed that services of all the Qur’anic theologians of Sub-continent are highlighted. This is a matter of pride for the author that things are discussed without any prejudice. The readers are the best judges. Suggestions regarding the improvement will be welcomed. I am thankful to Prof. Dr. Shams-ul-Basar and Dr. Zohaib Ahmad for guidance and Co-operation regarding the publication of this work. May Allah Almighty shower blessings on them. If...

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Monitoring and Measurement of Absorbing Aerosol and its Climatic Implications in Karachi, Pakistan

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