Soil Fertility as a Contingent Rather than Inherent Characteristic: Considering the Contributions of Crop-Symbiotic Soil Microbiota

Nativa ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 216
Author(s):  
Giovanno Radel Vargas ◽  
Renato Marques ◽  
Jonas Eduardo Bianchin ◽  
Hilbert Blum ◽  
Wilson Wagner Teixeira

Atributos microbiológicos do solo podem ser relacionados à ciclagem de nutrientes e mesmo com a produtividade de plantas e podem se relacionar com a fertilidade do solo ou com o potencial de desenvolvimento de determinadas espécies. O objetivo deste trabalho foi caracterizar atributos químicos e microbiológicos do solo em plantios com diferentes materiais genéticos de eucalipto, submetidos ou não ao desbaste florestal. O trabalho foi conduzido em área no município de Itatinga-SP, onde estão plantados oito clones e um plantio semental de eucalipto. As parcelas do experimento foram compostas pelos 8 clones e pelo plantio semental, sendo suas subparcelas as áreas em que foi realizado o desbaste e as áreas onde não foi realizado o desbaste. Foram realizadas coletas de solo para análises químicas e para os atributos microbiológicos nas camadas superficiais do solo. Não foi identificado efeito dos materiais genéticos sobre atributos químicos do solo. Foi observada tendência de maior atividade microbiológica no verão e não foi verificada influência do material genético sobre atributos microbiológicos, mas o desbaste influenciou alguns deles, sem, entretanto, comportamento padrão.Palavras-chave: microbiologia; clones; desbaste; microbiota do solo. CHEMICAL AND MICROBIOLOGICAL ATTRIBUTES OF THE SOIL IN CLONAL EUCALYPTUS PLANTATIONS ABSTRACT: Soil microbiological attributes can be related to nutrient cycling and even plant productivity and can be related to soil fertility or the development potential of certain species. The objective of this work was to characterize chemical and microbiological attributes of the soil in plantations with different genetic materials of eucalyptus, submitted or not to forest thinning. The work was carried out in an area in the municipality of Itatinga-SP, where eight clones and one eucalyptus seed plantation are planted. The experimental plots were composed of 8 clones and seed planting, with its subplots being the areas where thinning was carried out and the areas where thinning was not carried out. Soil collections were carried out for chemical analysis and microbiological attributes in the superficial layers of the soil. No effect of genetic materials on soil chemical attributes was identified. A trend towards greater microbiological activity was observed in the summer and there was no influence of genetic material on microbiological attributes, but thinning influenced some of them, without, however, standard behavior.Keywords: microbiology; clones; thinning; soil microbiota.


2021 ◽  
Vol 17 (2) ◽  
pp. 729-739
Author(s):  
Monalisa Dhall ◽  
Bandana Mishra ◽  
Saurav Barman ◽  
Praveen Boddana

Long- term adoption of total agricultural approach which negatively influences the soil prolificacy, soil microbiome and may compromise the feature and amount of crop mass production. In agriculture, soil is a critical part, in which the original sources of nutrients for grow crops and the microorganisms is very important to improve soil texture or soil health for healthy growing crops. Soil microbiota are an energetic component of soil and showed varieties useful activities in the soil system. Soil richness is the characteristic limit of a soil to give the fundamental plant supplements in sufficient sums and legitimate extents for plant development. There is an enormous chance to upgrade soil ripeness through microorganisms, as organisms are “inherent” soil controllers and impetuses adding to reusing of supplements into accessible inorganic structures and give early admonition of land corruption. The core interest of this part is on the possibility of utilizing organisms as decomposers of (cellulose, protein and lignin), formers (humus, nitrate and nitrite), nitrogen fixers, ammonifiers, oxidizers (iron, hydrogen and sulfur), phosphorus solubilizers and denitrifiers. In this specific circumstance, the components viz., natural toxins and environmental change that limit the improvement of soil richness. Today’s, there is great trial for the agricultural system in which growing the human population is a great problem in the land breakdown and decrease the microbial population that’s why enhance the soil fertility and plant growth rate decreases. Therefore, in this review we describe the benefits of soil microbiota to maintain soil fertility.


2020 ◽  
Vol 4 (2) ◽  
pp. 780-787
Author(s):  
Ibrahim Hassan Hayatu ◽  
Abdullahi Mohammed ◽  
Barroon Ahmad Isma’eel ◽  
Sahabi Yusuf Ali

Soil fertility determines a plant's development process that guarantees food sufficiency and the security of lives and properties through bumper harvests. The fertility of soil varies according to regions, thereby determining the type of crops to be planted. However, there is no repository or any source of information about the fertility of the soil in any region in Nigeria especially the Northwest of the country. The only available information is soil samples with their attributes which gives little or no information to the average farmer. This has affected crop yield in all the regions, more particularly the Northwest region, thus resulting in lower food production.  Therefore, this study is aimed at classifying soil data based on their fertility in the Northwest region of Nigeria using R programming. Data were obtained from the department of soil science from Ahmadu Bello University, Zaria. The data contain 400 soil samples containing 13 attributes. The relationship between soil attributes was observed based on the data. K-means clustering algorithm was employed in analyzing soil fertility clusters. Four clusters were identified with cluster 1 having the highest fertility, followed by 2 and the fertility decreases with an increasing number of clusters. The identification of the most fertile clusters will guide farmers on where best to concentrate on when planting their crops in order to improve productivity and crop yield.


2017 ◽  
Vol 4 (2) ◽  
pp. 87-91
Author(s):  
Ekamaida Ekamaida

The soil fertility aspect is characterized by the good biological properties of the soil. One important element of the soil biological properties is the bacterial population present in it. This research was conducted in the laboratory of Microbiology University of Malikussaleh in the May until June 2016. This study aims to determine the number of bacterial populations in soil organic and inorganic so that can be used as an indicator to know the level of soil fertility. Data analysis was done by T-Test that is by comparing the mean of observation parameter to each soil sample. The sampling method used is a composite method, which combines 9 of soil samples taken from 9 sample points on the same plot diagonally both on organic soil and inorganic soil. The results showed the highest bacterial population was found in total organic soil cfu 180500000 and total inorganic soil cfu 62.500.000


2018 ◽  
Vol 20 (5) ◽  
pp. 84
Author(s):  
Yingjie Hu ◽  
Xiangbin Kong ◽  
Yuzhen Zhang

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