scholarly journals Cyanobacterial biofertilizers as an alternative to chemical fertilizers in paddy fields: a review.

2021 ◽  
pp. 49-52
Author(s):  
Anand Arunrao Atnoorkar
Keyword(s):  
Chemical Fertilizer ◽  
Paddy Fields ◽  
Available Phosphorus ◽  
Atmospheric Nitrogen ◽  
Chemical Fertilizers ◽  
Carbon And Nitrogen ◽  
Fuel Demand ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
The Cost

In India, rice is the most significant crop in terms of the total area of cultivation and fertilizers. Distributed in 44.7 million hectares, it accounts for 31.8% (5.34 million tons) of the net use of the chemical fertilizer. Continuously using chemical fertilizers in agricultural production poses a severe environmental risk. The cost of chemical fertilizers is expensive and contributing to less crop yield. There is a need to adopt alternatives for chemical fertilizers in paddy fields. Cyanobacteria are abundant in paddy fields, and it presents remarkable contribution in producing the rice crop. It fixes atmospheric nitrogen, increases the accessibility of available phosphorus, and produces innumerable plant growth-promoting factors. It requires sunlight as the source of energy for carbon and nitrogen fixation in the soil. It represents remarkable potential as a biofertilizer and thereby decreases fuel demand for chemical fertilizer production. Cyanobacterial biofertilizers are inexpensive, simple to use, and do not harm the environment. This review focuses on the potential application of cyanobacterial biofertilizers in paddy fields.

scholarly journals Selection of the Root Endophyte Pseudomonas brassicacearum CDVBN10 as Plant Growth Promoter for Brassica napus L. Crops

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1788
Author(s):  
Alejandro Jiménez-Gómez ◽  
Zaki Saati-Santamaría ◽  
Martin Kostovcik ◽  
Raúl Rivas ◽  
Encarna Velázquez ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Plant Growth ◽  
Dry Weight ◽  
Bacterial Endophytes ◽  
Chemical Fertilizers ◽  
Brassica Napus L ◽  
Bacterial Microbiome ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Pseudomonas Brassicacearum

Rapeseed (Brassica napus L.) is an important crop worldwide, due to its multiple uses, such as a human food, animal feed and a bioenergetic crop. Traditionally, its cultivation is based on the use of chemical fertilizers, known to lead to several negative effects on human health and the environment. Plant growth-promoting bacteria may be used to reduce the need for chemical fertilizers, but efficient bacteria in controlled conditions frequently fail when applied to the fields. Bacterial endophytes, protected from the rhizospheric competitors and extreme environmental conditions, could overcome those problems and successfully promote the crops under field conditions. Here, we present a screening process among rapeseed bacterial endophytes to search for an efficient bacterial strain, which could be developed as an inoculant to biofertilize rapeseed crops. Based on in vitro, in planta, and in silico tests, we selected the strain Pseudomonas brassicacearum CDVBN10 as a promising candidate; this strain produces siderophores, solubilizes P, synthesizes cellulose and promotes plant height in 5 and 15 days-post-inoculation seedlings. The inoculation of strain CDVBN10 in a field trial with no addition of fertilizers showed significant improvements in pod numbers, pod dry weight and shoot dry weight. In addition, metagenome analysis of root endophytic bacterial communities of plants from this field trial indicated no alteration of the plant root bacterial microbiome; considering that the root microbiome plays an important role in plant fitness and development, we suggest this maintenance of the plant and its bacterial microbiome homeostasis as a positive result. Thus, Pseudomonas brassicacearum CDVBN10 seems to be a good biofertilizer to improve canola crops with no addition of chemical fertilizers; this the first study in which a plant growth-promoting (PGP) inoculant specifically designed for rapeseed crops significantly improves this crop’s yields in field conditions.

scholarly journals Ensifer sp. CNN3 - AN INDIGENOUS BACTERIAL STRAIN WITH PLANT GROWTH PROMOTING AND ORGANOPHOSPHORUS DEGRADING PROPERTIES IN VIETNAM

2021 ◽  
Vol 59 (1) ◽  
pp. 9
Author(s):  
Chi Kim Hoang ◽  
Trần Thị Như Hằng
Keyword(s):  
Plant Growth ◽  
Bacterial Strain ◽  
Bacterial Isolate ◽  
Soil Samples ◽  
Chemical Fertilizer ◽  
Northern Vietnam ◽  
Plant Growth Promoting ◽  
Test Soil ◽  
Growth Promoting

An indigenous effective bacterial strain has been isolated from soil samples of contaminated tea farming site in Northern Vietnam with chlorpyrifos degradability and plant growth promoting characteristics. The bacterial isolate was determined to belong to genus Ensifer (syn. Sinorhizobium), and its degrading property for OPP substrate chlorpyrifos in culture as well as in test soil were studied. The results open a prospect of applying the dual-effective bacterial strain in agriculture practices either to reduce the use of chemical fertilizer or to remediate OPP contaminated planting soils.

Effect of 2,4-D and inoculation with Azorhizobium caulinodans on maize

2006 ◽  
Vol 54 (1) ◽  
pp. 121-125 ◽  
Author(s):  
S. P. Saikia ◽  
S. P. Saikia ◽  
V. Jain ◽  
V. Jain ◽  
G. C. Srivastava ◽  
...  
Keyword(s):  
Plant Growth ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Azorhizobium Caulinodans ◽  
Chemical Fertilizers ◽  
Promoting Effect ◽  
Chemical Fertilization ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Produce Plant

Research over the last few years has shown that inoculation with nitrogen-fixing bacteria of the genus Azorhizobium presents an alternative for (or supplement to) chemical fertilization, mainly due to the capability of the bacteria to produce plant growth- promoting hormones. The Azorhizobium caulinodans strain ORS 571 in combination with 2,4-D was able to colonize the root interior of an Indian maize cultivar. After transplanting to pots, it was noticed that nodulated and Azorhizobium -treated plants showed higher chlorophyll content in the leaf and enhanced nitrate reductase activity, leading to higher yield as compared to the control plants (non-nodulated). A plant growth-promoting effect was clearly visible in all inoculated plants examined. nodulated plants treated with Azorhizobium had higher physiological activities as compared to plants treated only with Azorhizobium . Azorhizobium therefore creates potentially better symbiosis in the form of para -nodules and promotes a higher level of nitrogen fixation, leading to better growth and plant development, with reduced requirements for chemical fertilizers.

scholarly journals Impact of Vermicompost and Chemical Fertilizer on Yield, Growth and Essential oil of Garlic (Allium sativum L.)

2015 ◽  
Vol 9 (4) ◽  
pp. 44-48
Author(s):  
Sajedeh Golmohammadzadeh ◽  
Sobhanallah Ghanbari ◽  
Seyede Roghaye Hosseini Valiki ◽  
Hasan Hasannia
Keyword(s):  
Essential Oil ◽  
Allium Sativum ◽  
Agronomic Traits ◽  
Growth Parameters ◽  
Dry Weight ◽  
Chemical Fertilizer ◽  
Chemical Fertilizers ◽  
Npk Fertilizers ◽  
Shoot Dry Weight ◽  
The Cost

In order to investigate the influence of vermicompost and chemical fertilizers on growth parameters and essential oil of garlic (Allium sativum), an experiment based on randomized complete blocks design with 7 treatments, 4 replications and 21 plots was carried out in Qaemshahr, Iran 2012.Treatments were included witness (control), 5, 10, 15, 20and25t/ha vermicompost and NPK fertilizers. Results showed that all agronomic traits were significantly affected by vermicompost and chemical fertilizers compared to the control. The maximum shoot wet weight and shoot dry weight recorded in chemical and vermicompost treatments, respectively.The maximum number ofbulbletsper plantand bulb dry weigh observed vermicompost treatment (20 t/ha). Among all treatment, vermicompost had highest effect on essential oil compared to chemical fertilizer. In general, 15 t/ha of vermicompost treatment compared to other treatments was appropriate for yield andproduction essential oil and reducing the cost of crop production.DOI: http://dx.doi.org/10.3126/ijls.v9i4.12675

scholarly journals Distinct Root Microbial Communities in Nature Farming Rice Harbor Bacterial Strains With Plant Growth-Promoting Traits

2021 ◽  
Vol 4 ◽  
Author(s):  
Grace Flavyeliz Sinong ◽  
Michiko Yasuda ◽  
Yoshiyuki Nara ◽  
Chol Gyu Lee ◽  
Khondoker Mohammad Golam Dastogeer ◽  
...  
Keyword(s):  
Plant Growth ◽  
Farming Systems ◽  
Farming System ◽  
Bacterial Strains ◽  
Chemical Fertilizers ◽  
Distinct Root ◽  
Rice Growth ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Root Microbiome

A nature farming system is an ecological farming practice that entails cultivating crops without using chemical fertilizers and pesticides. To understand the diversity and functions of root microbiomes associated with nature farming systems, we compared the root microbial community of rice under nature farming conditions with those under conventional farming conditions. High-throughput amplicon analysis demonstrated a higher abundance and greater diversity of the root microbiome under unfertilized nature farming conditions than under conventional conditions. The application of chemical fertilizers reduced the microbial diversity and abundance of some beneficial taxa important for plant growth and health. Subsequently, we isolated and identified 46 endo- and epiphytic bacteria from rice roots grown under nature farming conditions and examined their plant growth-promoting activity. Six potential isolates were selected for plant growth assessment in insoluble P- and K-containing media. Most of the isolates promoted rice growth, and Pseudomonas koreensis AEPR1 was able to enhance rice growth significantly in both insoluble P- and K-containing media. Our data indicated that nature farming systems create a distinct root microbiome that is comparatively more diverse and supports plant growth under low-input cultivation practices than under conventional practices. The potential isolates could be exploited as sources with potential applications in sustainable agriculture.

scholarly journals Screening of Potential Plant Growth Promoting Properties of Bacillus Species Isolated from Different Regions of Nepal

2021 ◽  
Vol 9 (1) ◽  
pp. 79-84
Author(s):  
Enish Pathak ◽  
Arjun Sanjyal ◽  
Chhatra Raj Regmi ◽  
Saroj Paudel ◽  
Anima Shrestha
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Hydrogen Cyanide ◽  
Indole Acetic Acid ◽  
Agricultural Sector ◽  
Bacillus Species ◽  
Chemical Fertilizers ◽  
Plant Growth Promoting ◽  
Promote Plant Growth ◽  
Growth Promoting

The deleterious effects of intensive use of chemical fertilizers and pesticides in agriculture has led to the substantial research efforts on finding the alternatives to these agrochemicals. This study was aimed to isolate Bacillus species from soil of different regions of Nepal and screen for their ability to promote plant growth directly or indirectly by testing their ability to produce plant growth hormone indole acetic acid, hydrogen cyanide, ammonia and protease as well as phosphate solubilization. Thirty nine Bacillus strains were isolated from 25 soil samples of different regions of Kathmandu and Chitwan districts of Nepal. These isolates were tested for plant growth promoting traits in vitro. Among the total isolates, about 48.7% were indole acetic acid producers, 38.4% of the isolates showed the ability to solubilize the phosphate, 71.8% were able to produce ammonia and all the isolates had the ability to produce hydrogen cyanide and protease. The isolated strains showed positive results to maximum PGPR traits and exhibited a potential to be used as alternatives to chemical fertilizers and pesticides and could be used as low-cost bio-based technology to promote plant growth in the agricultural sector.

scholarly journals Promoting fruit seedling growth by encapsulated microorganisms

2018 ◽  
Vol 40 (3) ◽  
Author(s):  
Carlos Henrique Barbosa Santos ◽  
Antonio Baldo Geraldo Martins ◽  
Everlon Cid Rigobelo ◽  
Gustavo Henrique de Almeida Teixeira
Keyword(s):  
Plant Growth ◽  
Dry Mass ◽  
Eriobotrya Japonica ◽  
Annona Muricata ◽  
Chemical Fertilizers ◽  
Average Temperature ◽  
Fruit Species ◽  
Myrciaria Dubia ◽  
Plant Growth Promoting ◽  
Growth Promoting

Abstract The use of microorganisms capable of promoting plant growth has been accepted as an alternative to reducing the use of chemical fertilizers. The aim of this study was to evaluate the inoculation of plant growth promoting microorganisms in seedlings of fruit species, verifying the interaction of the inoculums with encapsulating agents such as clay and alginate. Microbial inoculums contained the following species: Azospirillum brasilense, Burkolderia cepacia, Bacillus thuringienses, Bacillus megaterium, Bacillus cereus,Bacillus subtilis, Tricoderma spp. and isolate 411. The fruit species evaluated were: Myrciaria cauliflora (DC.) O. Berg; Myrciaria glazioviana (Kiaersk.) G. Barros &Sobral; Myrciaria dubia (Kunth) Mc Vaugh; Eugenia brasiliensis Lam.; Diospyroskaki L.; Garcinia brasiliensis Mart.; Annona muricata L.; Duguetia lanceolata A. St.-Hil.; Chrysophyllum cainito L.; Anacardium occidentale L.; Eriobotrya japonica (Thunb.) Lindl. and Litchi chinensis Sonn. The experimental design was completely randomized, in a factorial scheme 3 (control, sodium alginate and clay) x 2 (presence and absence of microbial inoculum) with five replicates (one seedling per replicate). Seedlings were maintained in 50% of illumination at an average temperature of 22.5 °C for ninety days, and plant height, diameter, root and shoot dry mass were evaluated. Plant growth promoting microorganisms, regardless of encapsulation used, promote higher development of C. cainito and L. chinensis seedlings.

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