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Home > Effect of Organic and Inorganic K Sources and System of Rice Intensification on Growth and Yield of Genotypically Varying Rice Cultivars

Effect of Organic and Inorganic K Sources and System of Rice Intensification on Growth and Yield of Genotypically Varying Rice Cultivars

Thesis Info

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External Link

Author

Muhammad Arif

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2009

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/1601

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725983575

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A series of trials, including hydroponics and soil experiments, were conducted to document the phenotypic variation among rice genotypes and the response of selected genotypes to inorganic and/ or organic sources of K under standard rice management (SRM) and system of rice intensification (SRI). In a solution culture study, changes in growth attributes under both deficient and adequate K levels indicated differential adaptation of 26 rice genotypes. Three of 26 genotypes, namely, IR-6, Super basmati and 99509, were selected for subsequent studies on the basis of their differential responses for K use efficiency (KUE), shoot biomass, and K uptake at deficient and adequate K levels. The categorization of rice genotypes was made using the index scoring technique. Accordingly, 99509 was categorized as highly efficient-medium responsive, Super basmati as medium efficient-medium responsive, while IR-6 as low efficient-low responsive. Correlation among various growth parameters was calculated, and a strong correlation was found among shoot biomass, KUE, and total K uptake. The growth and yield responses of these selected genotypes were subsequently studied with exogenously applied K (K 2 SO 4 ) in pot trials. On overall basis, the KUE determined the responses of various growth and yield parameters against varying levels of K application. Again, the order of genotypes with respect to KUE was found to be the same as that observed in the hydroponic study, i.e., 99509 was found to be highly efficient, Super basmati was medium efficient, and IR-6 was non-efficient in term of growth and yield attribute formation. A dose of 60 kg K ha -1 was found optimum for increasing most of the growth and yield attributes of the three rice genotypes, which was very close to that calculated amounts obtained using the quadratic model. Keeping in view the cumulative effects, a dose of 60 kg K ha -1 was selected for subsequent field trials. Thereafter, the genotypes were tested under the conventional SRM (continuously flooded) and SRI (intermittently flooded) systems. The growth, yield and quality of the three genotypes were studied under single and integrated use of inorganic and organic K fertilizer. Most of the growth and yield attributes gave maximum response with integrated application of 30 kg K ha -1 as K 2 SO 4 + 30 kg K ha -1 as K-enriched compost under SRM, while 15 kg K ha -1 as K 2 SO 4 + 15 kg K ha -1 as K-enriched compost proved best under SRI. Super basmati gave the maximum grain yield under SRM, while under SRI 99509 was best, both with integrated application of 15 kg K ha -1 as K 2 SO 4 + 15 kg K ha -1 as K-enriched compost. However, maximum straw yield was produced by 99509 with integrated application 1of 15 kg K ha -1 as K 2 SO 4 + 15 kg K ha -1 as K-enriched compost under SRM, while integrated application of 30 kg K ha -1 as K 2 SO 4 + 30 kg K ha -1 as K-enriched compost resulted in maximum straw yield in Super basmati under SRI. IR-6 remained relatively poor in performance in most of the growth and yield parameters. It was note worthy that the genotype 99509, which was rated highly efficient in K use in hydroponic trial changed its response as medium efficient in K use in field trials (both in SRI and SRM), while exactly reverse trend with respect to KUE was observed in case of Super basmati. IR-6 remained relatively poor in growth, yield and KUE under both the systems of management. Total K uptake and KUE of the genotypes varied with K doses and sources under SRM and SRI, affecting the growth and yield parameters of the three rice genotypes tested. Most of the quality parameters under SRI and SRM gave almost similar values, implying that SRI had no negative effect on yield and quality of both coarse and fine varieties of rice. Moreover, SRI was seen to be a viable approach to save water without compromising the yield and quality of the produce, thus it may be adopted as a low-input technology system.
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شیخ عبدالقادر سرفراز

شیخ عبدالقادر سرفراز (پونا)
افسوس ہے کہ گزشتہ مہینہ فضل و کمال کی ایک ممتاز یادگار اٹھ گئی، یعنی پروفیسر شیخ عبدالقادر سرفراز (پونا) نے چوہتر سال کی عمر میں انتقال کیا، مرحوم مشرقی علوم والسنہ کے نامور فاضل تھے، عربی، فارسی اور انگریزی کے علاوہ سنسکرت اور مرہٹی زبان کے بھی ماہر تھے، عبرانی سے بھی واقفیت رکھتے تھے، ان کی پوری زندگی علم و تعلیم کی خدمت میں گزری، ابتدا میں انفنسٹن کالج بمبئی میں استاد مقرر ہوئے تھے، پھر دکن کالج پونا میں تبادلہ ہوگیا، اور یہیں سے ۱۹۳۳؁ء میں ریٹائر ہوئے، ان کی علمی خدمات کی فہرست طویل ہے ، بمبئی یونیورسٹی کے عربی فارسی اور اردو مخطوطات کا محققانہ کیٹیلاگ تیار کیا جو عرصہ ہوا چھپ چکا ہے، تاریخ طبری کی بعض جلدوں کا انگریزی میں ترجمہ کیا، یہ بھی شائع ہوچکا ہے، تاریخ جہانگشاہی نادری، سبحۃ الابرار جامی اورو قائع نعمت خان عالی کی تصحیح و تہذیب کی اور اس پر محققانہ حواشی لکھے، جن کی اشاعت کی نوبت ابھی تک نہیں آئی، ان کے علاوہ اور بہت سے کام انجام دیئے، جن کی تفصیل آئندہ کسی پرچہ میں پیش کی جائے گی۔
اس علم کے ساتھ نہایت راسخ العقیدہ و باعمل اور پابند مذہب مسلمان تھے، حج بیت اﷲ کے شرف سے بھی مشرف ہوئے تھے، طبعاً نہایت متین، سنجیدہ، خاموش اور متواضع و خاکسار تھے، مولانا شبلی مرحوم سے ان کے تعلقات بڑے مخلصانہ تھے، جو ان کے بعد وراثۃً دارالمصنفین کے حصہ میں آئے، دارالمصنفین سے ان کو نہایت گہرا تعلق تھا، اس کی مجلس انتظامیہ کے رکن بھی تھے، عرصہ ہوا ایک مرتبہ پونا سے اعظم گڑھ آنے کی زحمت گوارا کی تھی، اب اس زمانہ میں ایسے اصحاب کمال کا پیدا ہونا مشکل ہے، اﷲ تعالیٰ اس سرفرازِ علم کو اپنی رحمت و مغفرت سے سرفراز...

مسئلہ حجاب: فرانسیسی مسلمان خواتین اور اسلامی تعلیمات

Human history is replete with preposterous and unjustifiable incidents of unearned sufferings against the women. Sometimes they were maltreated and molested harshly and sometimes they were abused, persecuted bestially. Contrary to these incidents occasionally they were considered superior and super angelic but on the contrary Islam has bestowed a dignified status to them regarding their rights and responsibilities. In this regard a comprehensive manifestation has been introduced by the Islam and until this manifestation was being followed by the Muslims no single complain was lodged by any woman against the violation of her basic in the Islamic societies till the climax of Islamic regime. But today some European countries are holding discussions to impose illegal sanctions against the veil of women and girls. The parliament of France has approved a discriminatory law against veil of the Muslim women or girls. It is amazing that Christian nun is at her liberty to cover her head with scarf or not but if Muslim women consider themselves safe in veil they are contemptuously scorned with derision and disdained. In this article views of France and Islamic teachings have been brought under discussion.

Epidemiology of Foot-And-Mouth Disease in Pakistan and Afghanistan

Foot-and-mouth disease (FMD) is a highly contagious disease of cloven-hoofed animals that causes heavy economic losses. The causative agent, foot-and-mouth disease virus (FMDV) exists in seven distinct serotypes i.e. O, A, C, Asia-1, SAT1, SAT2 and SAT3. Multiple subtypes can also be identified within these serotypes. The present study reports the distribution of FMDV in Pakistan during the period 1952 to 2007. During this time, 1543 out of 2484 epithelial samples from suspect cases of FMD were found positive. Serotype O was the most prevalent followed by Asia-1 and A. The disease was more prevalent (P<0.001) in cattle than buffaloes. Higher numbers of outbreaks of the disease occurred between January to March during 2002 to 2007, which may result from livestock movement due to the festival, Eidul Azha, in which animals are sacrificed. Some 1501 oral swab samples from Pakistan, Afghanistan and Tajikistan were collected from clinically healthy animals between July, 2008 and August, 2009. RNA was extracted from the samples and was subjected to real time RT-PCR for detection of FMD viral genome. In addition, RNA was also extracted from 142 epithelial samples collected from clinically suspect cases of FMD between 2005-2009. Samples with Ct values of ≤30 were further processed for sequencing the whole VP1 coding region to identify the serotype and sub-type of the virus. Nucleotide sequences were also obtained from GenBank. Sequence comparisons were performed to establish the phylogenetic relationships between the viruses. The samples from two (of four) animal markets in Pakistan, one of three markets in Afghanistan and both the live animal markets in Tajikistan all tested negative. However, ~2% of samples from Gondal and 9% from Chichawatni in Pakistan were positive for FMDV RNA. Similarly, 15% of samples from Kabul and 50% from Badakhshan in Afghanistan were found positive. Serotypes A and O of FMDV were identified within these samples. In addition, oral swab samples were collected from dairy colonies in Lahore and Nagori (Karachi) but all tested negative. In the Landhi dairy colony, a cohort of 179 apparently healthy animals was studied. On their arrival, 22% of these animals were found positive for FMDV RNA (serotype A was identified) while 73% had antibodies to FMDV non-structural proteins. Thus newly introduced animals may be a significant source of the disease in the colony. Nucleotide sequences encoding at least the complete VP1 protein for 122 FMDVs from Pakistan and Afghanistan were determined. Phylogenetic analysis of the serotype O FMDVs present between 1997 and 2009 revealed the presence of multiple lineages within the ME-SA (Middle East South Asia) topotype. The PanAsia lineage is currently dominant and has evolved into distinct variants e.g. PanAsia-II and PanAsia-III. The rates of evolution of the O-PanAsia-II and III sublineages were 6.65 × 10-3 and 7.80 × 10-3 substitutions per nucleotide per year (s/nt/yr), respectively. Genetic analysis of serotype A FMDV from these countries collected between 2002 and 2009 revealed the presence of at least four lineages within two genotypes in the Asia topotype. The predominant lineage was A-Iran05 which has evolved into seven distinct variants, the dominant being the A- Iran05AFG-07 and A-Iran05BAR-08. The rate of evolution of the A-Iran05 lineage was 1.12 × 10-2 s/nt/yr. This high rate is consistent with the rapid appearance of new variants of FMDV serotype A. The A22/Iraq FMDV vaccine is antigenically distinct from A-Iran05BAR-08 viruses. Mapping of the amino acid changes between the capsid proteins of the A22/Iraq vaccine strain and the A-Iran05BAR-08 viruses onto the A22/Iraq capsid structure identified candidate amino acid substitutions, exposed on the virus surface, which may explain this antigenic difference. Phylogenetic analysis of serotype Asia-1 FMDVs revealed that three genetic Groups have circulated in Pakistan within 1998-2009. These are Group-II, -VI and a Group designated Group-VII. This new Group has not been detected in Afghanistan during the reported period but viruses from Groups I and -II are in circulation there. These studies revealed that multiple subtypes of FMDV serotypes O, A and Asia-1 co-circulate in the region and that significant new variants are frequently emerging. We have also identified an interserotypic recombinant virus, with the VP2-VP3-VP1-2A coding sequences derived from a Group-VII Asia-1 virus and the remainder of the genome from a serotype A virus of the A-Iran05AFG-07 sublineage. The Asia-1 FMDVs currently circulating in Pakistan and Afghanistan are not efficiently neutralized by antisera raised against the Asia-1/Shamir vaccine strain. Thus, new Asia-1 vaccine strains may be required to block the spread of the current Asia-1 viruses.