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Integrated Saline Water Management in Maize Zea Mays L. Fodder Production

Thesis Info

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Author

Allah Wadhayo Gandahi

Program

PhD

Institute

Sindh Agriculture University

City

Tandojam

Province

Sindh

Country

Pakistan

Thesis Completing Year

2010

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2859/1/325S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726479823

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The scarcity of good quality irrigation water is a severe problem in dry areas of Pakistan, which has forced growers to widely explore the possibility of using salty water for irrigation. The shortage of irrigation water has increased since last decade, it is incumbent on agriculture to maximize the use of water of all qualities. Irrigating crops in presence of saline groundwater presents unique opportunities and challenges. Some studies reported that use of saline water for irrigation is feasible, especially when saline water is blended or alternated with good quality water. A series of experiments was conducted in laboratory, glass-house and field conditions at Sindh Agriculture University, Tandojam and Universiti Putra Malaysia from 2004 to 2007. Ten maize cultivars (Hicorn, Agaiti-2002, Margalla, Akbar, Sahiwal 2002, EV-5098, EV-3001, EV-1098, EV-6098 and EV-4001) were screened for salt- tolerance under different water qualities (EC 0.4, 2, 4, 6 and 8 dS m-1). Four maize cultivars were selected (EV-1098 and Agaiti-2002 as salt-tolerant and EV-4001 and Akbar as most salt-sensitive) and were further tested under saline irrigation scheduling and farmyard manure levels. The cultivar screening studies showed that out of ten maize cultivars, EV-1098 and Agaiti-2002 were salt-tolerant and EV-4001 Akbar were most salt- sensitive. It was observed that increase in salinity of water from EC 2.0 to 8.0 dS m-1 significantly affected all agronomic traits as well as soil and plant chemical properties. Maximum plumule, radical length, plumule, radical fresh weight, plumule, radical dry weight, plant height, stem girth, green leaves plant-1, green fodder and dry fodder yield were found under application of canal water (EC 0.40 dS m-1) and water quality having EC 2.0 dS m-1. Both treatments were at par with each other. It was further observed that application of saline water beyond EC 2.0 dS m-1 significantly reduced all the plant parameters and minimum values were exhibited under EC 8.0 dS m-1. Results indicated that soil salinity increased with increasing salinity levels of irrigation water. Same trend was observed in case of soluble cations (Na+, Ca2+, and Mg2+), anions (Cl- and SO42-), sodium adsorption ratio and exchangeable sodium percentage. However, soluble K+ decreased in soil profile with increase in water salinity. Over all results further indicated an increased contents of EC, soluble cations (Na+, K+, Ca2+ and Mg2+), soluble anions (HCO3-, Cl-, and SO42-), SAR and ESP at surface soil layer compared to lower layers, however, pH was more in lower soil depths. Among the cultivars, EV-1098 and Agaiti-2002 had good performance containing lower concentrations of Na+ and Cl- and higher K+, Ca2+ and Mg2+, resulting in higher K+/ Na+ ratio. The cultivar EV-4001 and Akbar accumulated maximum concentration of Na+ and Cl- and minimum concentration of K+, Ca2+ and Mg2+ and were identified as salt-sensitive. A pot study on saline irrigation scheduling showed that application of canal water (EC 0.18 dS m-1) at all growth stages of maize and treatments comprising canal water application during soaking and at early whorl stage and saline water (EC 4.0 dS m-1) during late whorl stage were at par with each other and produced taller plants, maximum stem girth and green leaves plant-1, green and dry fodder yield. In contrast, these plant traits decreased in the treatments where sole application of saline water was applied at all growth stages. In this irrigation scheduling study,EV-1098 and Agaiti-2002 were salt-tolerant with better performance compared to EV-4001 and Akbar as salt-sensitive. The values of EC, soluble Na+, Cl-, SO42-, SAR and ESP in soil increased where crop received saline water throughout growing period. The soluble K+, Ca2+ and Mg2+ contents in soil increased where canal water was applied from sowing to harvest. FYM reduced the negative impact of saline water on crop parameters including fodder yield. Maximum response was obtained at FYM 25 tons ha-1, beyond this non-significant increase in the agronomic values was noted. Sole application of saline water reduced the growth and fodder yield of maize cultivars and increased salt contents in soil and caused accumulation of toxic ions (Na+ and Cl-) in plant. The salt-tolerant cultivars (EV-1098 and Agaiti-2002) responded better under saline condition compared to salt-sensitive (EV-4001 and Akbar) cultivars by maintaining more concentration of K+, Ca2+ and Mg2+ in plants. Regression analyses across maize cultivars, water qualities, irrigation scheduling and FYM showed positive relationships of plant height, green leaves, and K+ concentration in plant and negative relationship of dry leaves, Na+ and Cl- accumulation in plant with maize fodder yield. The unit increase in various traits resulted in corresponding increase in maize green fodder yield. It was concluded that EV-1098 and Agaiti-2002 were most salt-tolerant cultivars and EV-4001 and Akbar were more salt-sensitive against saline irrigation water. Canal water application to maize and canal water application during soaking + early whorl stage + brackish water (EC 4.0 dS m-1) during late whorl stage were equally efficient where lower accumulation of toxic ions in plants were noted. The saline water could also be applied to maize at later growth stages when canal water is scarce. The adverse effects of the saline water could also be minimized by the application of canal water or incorporation of FYM at the rate of 25-30 tons ha-1 in the soil.
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غلام رسول مہر ؔ

غلام رسول مہرؔ
غلام رسول مہر صاحب کی زندگی کا آغاز صحافت سے ہوا، وہ ایک زمانہ تک اخبار زمیندار کے عملہ ادارت میں رہے، پھر مولانا ظفر علی خاں سے اختلاف کی بنا پر عبدالمجید سالک سے مل کر انقلاب کے نام سے اپنا مستقل اخبار نکالا، جو اپنے دور کا مشہور اخبار تھا، اس میں اور زمیندار میں نوک جھونک چلتی رہتی تھی، انقلاب کے فکاہات جو سالک صاحب کے قلم سے ہوتے تھے، خاص چیز تھے، اس کو لوگ بڑے ذوق سے پڑھتے تھے، مہر صاحب تنہا صحانی ہی نہیں تھے، ان کا علمی و تحقیقی ذوق بھی بلند تھا، انھوں نے حضرت سید احمد شہید بریلوی اور غالب پر بڑی مبسوط اور محققانہ کتابیں لکھیں، ان کے علاوہ بھی بعض چھوٹی چھوٹی کتابیں ہیں، دارالمصنفین سے ان کو خاص تعلق تھا، ان سے کبھی کبھی خط و کتابت ہوتی تھی، ان کی موت سے ایک نامور اہل قلم اٹھ گیا، اﷲ تعالیٰ ان کی مغفرت فرمائے۔ (شاہ معین الدین ندوی، دسمبر ۱۹۷۱ء)

 

EFFECTS OF MULLIGAN ROTATIONAL MOVEMENT VERSUS MEDIAL GAPPING TECHNIQUE ON PAIN, RANGE OF MOTION AND DISABILITY IN PATIENTS WITH KNEE OSTEOARTHRITIS

Background and Aim: To compare the effects of mulligan rotational movement and medial gapping technique on pain, range of motion and disability in knee osteoarthritis patients. Methodology: This study was a Randomized Clinical Trial. The data was collected using a convenience sampling technique. Data was collected from Jinnah Hospital Lahore, from 15th December – 30th June 2022.36 subjects (males and females) were recruited in two groups. The first group received Mobilization with movement along with a conservative treatment protocol. The second group received the Medial gapping technique along with conservative treatment protocol. Each group was treated for four weeks in which three sessions per week were given. Numeric pain rating scale and the disability index were used as outcome measures. Data was analyzed through statistical package for the social sciences (SPSS) version 25. Results: Within-group comparison by paired t-test showed the p-value was significant <.05, indicating that both treatment was effective in improving symptoms. Between groups, comparison by independent t-test showed that Mulligan Mobilization Technique is more effective than the medial gapping technique in improving pain disability and quality of life. Conclusion: The study concluded that Mulligan Mobilization Technique provides more clinical benefits regarding pain, disability and range of motion in osteoarthritis patients than Medial Gapping Technique.

Transfer of Rol Genes and Evaluation of Artemisinin Synthesis in Transgenic Artemisia Annua L. and Artemisia Dubia Wall.

Artemisinin is an important secondary metabolite of Artemisia annua and Artemisia dubia. It is a major constituent of Artemisia species. Chemically it is an endoperoxide sesquiterpene lactone. It is a potent antimalarial drug that has also been proven very effective in treatment of cancer. The rol genes have been known to enhance production of secondary metabolites in plants, possibly through stimulation of defense pathway. This study examines the effect of transformation of A.annua and A.dubia with the rol genes through Agrobacterium tumefaciens and Agrobacterium rhizogenes. The artemisinin content, trichome density and expression of key genes in the biosynthetic pathway of artemisinin were measured. Anticancerous activity of extracts of transformed and untransformed A.annua and A.dubia was also observed against MCF-7 breast cancer cell lines. Transcriptomic study of transformed and control A.annua and A. dubia was carried out as well. A number of factors like type of explants, effect of sterilization and co- cultivation period have been reported to affect the efficiency of A.tumefacienes mediated transformation. LBA4404 strain of A.tumefacienes containing pRT99 plasmid harboring rol ABC genes were used for the A.tumefacienes mediated transformation. Mercuric chloride 0.1% for 2 minutes showed the best results for seed surface sterilization giving 95% germination. Leaf and stem were found best explants for transformation. Explants were infected with bacterial culture for 5 minutes and cultured on co-cultivation medium (MS medium with 200 μM acetosyringone) for 48 hours. Explants when cultured on selection medium (MS medium containing 0.1mg /L BAP supplemented with 50mg/ml kanamycin), resulted in the maximum number of transformants. Regeneration of transgenic shoots was obtained from both stem and leaf explants on regeneration medium (MS medium containing 0.1mg /L BAP supplemented with 20mg/ml kanamycin and 500mg/l cefotaxime). Eighty percent of the transgenic A.dubia shoots showed rooting response on half MS medium with 0.025mg/L NAA, while transgenic shoots of A.annua produced roots on half MS medium with 0.1mg/L NAA. Control and transgenic plants were transferred to small pots and acclimatized. Morphological differences like increased size and broad leaves were observed. Confirmation of transformation was made through PCR for rol A, B and C genes. Southern blot analysis was performed to check the copy number of inserted genes.A.rhizogenes strain LBA9402 and LBA 8196 carrying rol genes were used for the A.rhizogenes mediated transformation. Transformation with A.rhizogenes was carried out with the plants growing in green house through their in-vitro propagation. Hairy roots were produced from A. rhizogenes strain LBA9402 infected stem portions of A. annua and A.dubia after seven days of infection but no hairy roots were produced from strain LBA8196. Transformed and control roots were cultured on solid B5 medium for further roots proliferation. Transformed roots showed better proliferation than control roots. Artemisinin content was significantly increased in transformed material of both Artemisia species when compared to un-transformed plants. The artemisinin content increased mostly five to ten times within leaves of transformed lines, hairy roots and roots of transformed shoots. It indicated the plant capability of synthesizing much higher amounts than has been achieved so far through traditional breeding. Similarly, amount of different derivatives of artemisinin i.e. artemether, arteether, dihydroartemisinin and artesunate was also significantly increased in transformed material of both Artemisia species when compared to un-transformed plants. Expression of all the tested genes involved in artemisinin biosynthesis pathway was significantly increased, although variation amongst the genes was observed. Cytochrome P450 (CYP71AV1) and aldehyde dehydrogenase 1 (ALDH1) expression levels were higher than that of amorpha-4, 11 diene synthase (ADS). Levels of the trichome development and sesquiterpenoid biosynthetic gene (TFAR1) expression were also found increased in all transgenic lines. Trichome density significantly increased in the leaves of transformed plants, but no trichomes were seen in control or transformed roots. Crude hexane and aqueous extracts of rol genes transformed plants revealed higher anticancerous activities against MCF-7 breast cancer cell lines. Hexane extracts of transgenic plants revealed higher anticancerous activity against MCF-7 breast cancer cell lines compared to aqueous extracts. Transcriptomic study of A.annua and A.dubia allowed sequencing of the transcriptome of these species for the first time. 16400 Contigs were generated by aligning different transcriptome sequences. Up and down regulation and Putative gene functions were predicted. BLAST of 500 contigs was performed, out of which 264 contigs showed homology with genomes of different organisms. Blast results of somecontigs showed that some species have genes that are similar to those involved in artemisinin biosynthesis pathway. It would be interesting to know what are the pathways in which those genes are involved in these species. Furthermore, divergence of A. annua and A.dubia from the common ancestors can be found through phylogenetic tree construction.