http://rulrepository.ru.ac.bd/handle/123456789/92 Tue, 07 Apr 2026 21:40:19 GMT 2026-04-07T21:40:19Z http://rulrepository.ru.ac.bd/handle/123456789/1100 Advanced fertilizer management enhances productivity and suppresses foliar disease of mulberry plant' Ahmed, Faruque Quality and quaintity of mulberry plant production is well known to be extremely demanding to fertilizer and disease management. The advanced fertilizer management is the pre-requisities for sustainable mulberry plant production and improvement of mulberry leaf quality as well as reduction of incidences of foliar diseases of mulberry. The existing Bangladesh Sericulture Research and Training Institute (BSRTI) recommended inorganic fertilizer management is not adequate for quality and quaintity mulberry plant production as well as suppression of foliar diseases of mulberry plant. That's why, the present study was undertaken to introduce advance fertilizers management practices for sustainable mulberry plant production in Bangladesh. This study was conducted in the research field of BSRTI, Rajshahi, Bangladesh. The aims of this study was to investigate the productivity and suppression of foliar diseases incidences of mulberry plant under various fertilizer management practices such as liquid fertilizer (LF), farm yard manure (FYM), rice husk biochar, mineral enriched biochar, vermi-compost (VC), cow dung compost (CW), seri-waste compost (SW), elevated doses of NPK compared to BSRTI recommended basal dose of NPK for mulberry cultivation. A series of field experiments were conducted through different experimental desings with high bush mulberry plantation system for achieving the respective objectives of this study. The leaf yield and quality of mulberry plant was observed through various fertilizers management practices. Generally, the mulberry plant is affected by the various diseases like, powdery mildew, leaf spot, leaf rust, bacterial blight, root rot, root knot, tukra etc. due to fertilizer management. Among them common foilar diseases viz: powdery mildew, leaf spot and tukra were studied for this study irrespective to advanced fertilizer management practices. Among the all fertilizers management practices, the performanace of seri-waste compost was good in terms of leaf yield, leaf qualities and suppression of foliar diseases. However, among the organic and liquid fertilizers management on top of BSRTI recommended basal plus seri-waste compost performanace was best followed on top of B+CW, B+VC, B+FM, B+MB, B+RB and B+LF fertilizers management. The maximum leaf yield was 52.23 MT/ha/year for the B+SW fertilizer management which was 87.07% higher than the average leaf yield of only the basal treated plant. The leaf qualities of mulberry plant was also better on top of B+SW fertilizer management followed by on top of application of B+CW, B+VC, B+FM, B+MB, B+RB and B+LF fertilizers management. The leaf qualities percentage viz: moisture, crude protein, soluble carbohydrate, mineral and total sugar were 9.11, 32.52, 40.03, 38.08 and 26.05 respectively greater for on top of B+SW treated mulberry plant over the single application of BSRTI recommended basal dose of NPK (B). Furthermore, on top of basal plus seri-waste compost was also reduction the incidences of powdery mildew, leaf spot and tukra diseases were 80.64, 89.44 and 87.58 percent respectively greater than the single dose of BSRTI recommended basal dose of NPK (Traditional fertilizer management). Similarly, among the organic fertilizer management next to B+SW fertilizer management the performance on top of basal plus cow-dung compost was 2nd higest interms of growth, leaf yield, leaf quality as well as suppression of foliar diseases. However, on top of basal plus 3 times foliar srpray of 2ml LF/L water after 15 days intervale gave the leaf yield was 36.77 MT/ha/year which was 31.70% greater than the average leaf yield of basal with maximum leaf quality and maximum reduction of foliar diseases incidences followed by the recommended basal dose of NPK. Furtheremore, among the inorganic fertilizer management the elevated 400 kg N/ha/year with four split doses along with BSRTI recommended basal dose of 150 kg P and 100 kg K showed the better performance followed by the elevated doses of 200 kg P and 150 kg K/ha/year respectively. Similarly, the leaf yield was 47.20 MT/ha/year with higher moisture, crude protien, total sugar, mineral and soluble carbohydrate percentage for the graded doses of 400 kg nitrogen/ha/year. However, among the inorganic fertilizer management the elevated dose of potassium presented the better results in terms of reduction of foliar diseases incidences. The elevated 150 kg K/ha/year with recommended 300 kg N and 150 kg P/ha/year with four split doses reduction the powdery mildew, leaf spot and tukra diseases incidences were 38.73, 30.28 and 19.98% respectively greater over the recommended basal dose of NPK. Likewise, between the 0-5 and 6-10 year’s ages of mulberry plant the 6-10 years ages of plant gave the maximum leaf yield with better leaf quality as well as maximum reduction of foliar diseases followed by the 0-5 year’s ages of mulberry plant. Furthermore, this study showed that among the three foliar diseases and three cropping seasons namely, late autumn, rainy and summer seasons the incidence of powdery mildew disease in late autumn season was comparatively high. Likewise, the BM-11, BM-8, and Black varieties to powdery mildew, BM-4, BM-11 to leaf spot and BM-8, BM-10, BM-11 and S-30 were comparatively resistant to tukra disease. However, this study concluded that among the all fertilizers management irrespective to mulberry plant growth, mulberry leaf yield and quality as well as maximum suppression of common foliar diseases, the performance of BSRTI recommended convational basal dose of NPK plus 10MT Seri-waste compost/ha/year was the best management practice for sustainable mulberry cultivation in Bangladesh. This Thesis is Submitted to the Department of Agronomy and Agricultural Extension , University of Rajshahi, Rajshahi, Bangladesh for The Degree of Doctor of Philosophy (PhD) Fri, 01 Jan 2021 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/1100 2021-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/1055 Response of Micronutrients on Growth and Yield of Wheat Under Late Seeding Heat Stress Condition Marzan, Maria Cereal and its derived products have a crucial importance worldwide. Baking industries extensively use wheat flour and also important source of various nutrient components. Therefore, this investigation is intended to study and determine growth, yield and physiochemical properties of wheat varieties. Heat stress is a worldwide problem, constraining global crop production seriously. The experiment was conducted to study the response of micronutrients on growth and yield of wheat under late seeding heat stress condition at the Regional Wheat Research Centre (RWRC), Rajshahi during the Rabi season from November 2015 to April 2016 and November 2017 to April 2018. A split-split plot design was adopted with three replications. Two wheat varieties BARI Gom 26 and BARI Gom 28 were used as test crop, three seeding dates one was optimum and other two were late condition (25th November, 10th December and 25th December) were applied as heat stress condition and four micro-nutrients levels (absolute control, 1.25 kg B ha-1, 5.30 kg Zn ha-1 and 1.25 kg B ha-1 + 5.30 kg Zn ha-1) were used to conduct this experiment. The study revealed that the crop sown on the 25th November gave most of the highest growth, yield components, yield and finally produced the highest nutrient parameters from both the years. Heat stress late sown condition caused significant reductions in growth and yield of both wheat varieties. It was evident from the results that micro-nutrients have significant effect on growth parameters. Total Dry Matter (TDM) increased with the increase of age of plant. Leaf Area Index (LAI) increased slowly at the early stage of crop growth then rapidly increased at vegetative stage and then it declines. Crop Growth Rate (CGR) and Net-Assimilation Rate (NAR) also had the similar results. Relative Growth Rate (RGR) was also found maximum at crown root initiation to tillering stage and then declined with increasing in plant growth stage. Leaf Area Ratio (LAR) declined in the successive growth stage and it reached the lowest at maturity stage in both the years. However, the highest grain yield was obtained from the treatment M3 (1.25 kg B ha-1 + 5.30 kg Zn ha-1). The results revealed that BARI Gom 28 produced the highest grain yield with M3 (1.25 kg B ha-1 + 5.30 kg Zn ha-1). In contrast, the shortest plant and minimum grain yield being recorded from the control treatment. In comparison among of two wheat varieties with the response of different levels of micro-nutrients under late seeding heat stress condition demonstrated that BARI Gom 28 gave the highest performance (yield 4.99 and 4.63 t ha-1) than BARI Gom 26 (yield 2.40 and 1.60 t ha-1) in both the two years among most of the parameters. The results of the experiment also revealed the bio-chemical composition of wheat grain. Each sample has been counted in 100 g of grain. Heat stress also decreased all the nutrient parameters except protein and ash content. The BARI Gom 28 had the highest amount of protein, carbohydrate, starch, pH, ash, Ca, and P with the treatment M3 (1.25 kg B ha-1 + 5.30 kg Zn ha-1) whereas BARI Gom 26 had highest TSS, Fe and Zn. Results showed that both the wheat variety could be used to make various type of brand wheat flour for baking products. The overall results indicate that micronutrient levels M3 (1.25 kg B ha-1 + 5.30 kg Zn ha-1) was better in variety BARI Gom 28 than BARI Gom 26 for growth, yield and yield contributing characters as well as nutrient parameters under late sown heat stress tolerance in AEZ-11. The data obtained from this comparative study will help in the development of suitable growth, yield and nutrient profile of wheat grain under late sown heat stress condition. This Thesis is Submitted to the Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Doctor of Philosophy (PhD) Fri, 01 Jan 2021 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/1055 2021-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/898 Arsenic Contamination in Ground Water in South-Eastern Bangladesh Iqbal, Md. Toufiq Groundwater with high arsenic concentrations from naturally occurring sources is the primary source of drinking water for millions of people in Bangladesh resulting in a major public health crisis of recent times. Arsenic concentrations can vary greatly from well to well, making the prediction of arsenic concentrations in a specific well very difficult. For that reason, arsenic concentration in various water sources at southeastern Bangladesh was studied. People in Bangladesh, particularly in the rural areas. are accustomed to using groundwater from hand tube wells for long and unlike surface water, it is considered safe from bacteriological pollution. In view of the overwhelming dependence of the population on groundwater, development of existing arsenic mitigation technologies such as rainwater harvester method, four pitcher method, two bucket method, pond sand filter, removal of arsenic through aeration and sand filtration, removal of arsenic through aeration, gravel and sand filtration, arsenic and iron removal system, arsenic removal through different sealing technologies and arsenic mitigntion in deep tube wells were studied in rural areas of south-eastern Bangladesh. But nol any method was not succeeded due to reliable result, illiteracy of rural people, lacking of suitability and awareness of people. Arsenic contaminated aquifers have no regular pattern, varies both horizontally and vertically within short distances and is commonly associated with fluctuating water tables. My research revealed about status of groundwater arsenic variations with respect to depth, seasons and age of tube wells. A total of 358 no. of tube well samples from the southeastern region were analyzed for arsenic contamination of ground water. MERCK Arsenic Test Kit no. I, 17926,0001 was used to determine arsenic contamination. Tube well water depth was measured with the help of avometer, measuring tap and plastic insulated wire. ------- This Thesis is Submitted to the Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Doctor of Philosophy (PhD) Sun, 01 Jan 2006 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/898 2006-01-01T00:00:00Z http://rulrepository.ru.ac.bd/handle/123456789/877 Studies on Productivity, Soil Fertility and N-Use Efficiency in Rice-Wheat-Mungbean Systems Using Tillage Options, Straw Management and Nitrogen Levels Hossain, Md. Ilias Rice-wheat rotation is the principal agricultural production system in South Asian countries. This system occupies around 13.5 million ha in the Indo Gangetic plains of Bangladesh, India, Nepal and Pakistan and 10.5 million ha in China (Ladha et al., 2003). Rice-wheat systems cover 32% of the total rice area and 42% of the total wheat area and account for about one-third the total rice and wheat production (Timsina et al., 2002). These systems have remained the major source of the marketed surplus of food grains for feeding the growing population. Rice and wheat are the world’s two most important cereals crops, contributing 45% of the digestible energy and providing 30% of the total protein in the human diet as well as making sustainable contribution to feeding livestock (Evans, 1993).Rice and wheat are now grown in sequence on the same land in the same year over 26 million ha of South and East Asia to meet up the food demand of rapidly expanding human population (Timsina and Cornor,2001 ).South Asian countries, Bangladesh, India, Nepal and Pakistan with a geographical area of 401.72 million ha, hold nearly half of the world population of 3.1 billion. Of which, 59% depends for livelihoods on agriculture. Nearly half of the land area is under agricultural crop production. It is estimated that nearly 60% of the farming households live on less than 30% of global agricultural lands (Gupta et al., 2003d) and approximately 240 million people in South Asia consume rice and/or wheat produced in rice-wheat systems ((Benites, 2001………………………………… This Thesis is Submitted to the Department of Agronomy and Agricultural Extension, University of Rajshahi, Rajshahi, Bangladesh for The Degree of Doctor of Philosophy (PhD) Mon, 01 Jan 2007 00:00:00 GMT http://rulrepository.ru.ac.bd/handle/123456789/877 2007-01-01T00:00:00Z