scholarly journals Effect of agrochemicals on spatio-temporal changes in soil agrochemical properties and yield of broccoli

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Natalya Vladimirivna Gopp ◽  
Keyword(s):  
Organic Phosphorus ◽  
Total Content ◽  
Temporal Changes ◽  
Soil Horizon ◽  
Mineral Fertilizers ◽  
Mineral Fertilization ◽  
Mobile Form ◽  
Calcium And Magnesium ◽  
Spatio Temporal ◽  
Gray Soil

The aim of the study. The aim of the study was to examine the effect of agrochemicals (mineral and organo-mineral fertilizers, plant growth regulators and ameliorants) on the spatio-temporal changes in the properties of agro-gray soil and broccoli yield using a cartographic approach. Methodology. The field experiment was conducted in 2016 at the site located near the Bykovo village in the south-east of West Siberia (54°58 '02.8" N; 83°5'21.45" E, Novosibirsk region). The objects of the study were the agro-gray soil (Luvic Retic Greyzemic Phaeozem (Siltic, Aric)) and the medium-ripe broccoli cabbage variety "Linda". The experiment scheme included the following treatments: (1) Control (without fertilizers), (2) Background (N100P60K160), (3) Background + succinic acid, (4) Background + dolomite, (5) Background + mulch, (6) Organo- mineral fertilizer "Criall". Soil samples were analyzed for the content of organic carbon, nitrates, total, mineral and organic phosphorus, as well as its mobile form; exchangeable potassium, calcium and magnesium, and pH. The dried samples of broccoli inflorescences were analyzed forthe total content of nitrogen, phosphorus, potassium, calcium and magnesium.Main results. After applying agrochemicals and harvesting broccoli, the variation coefficients of рН, mobile phosphorus, potassium and calcium increased by two or more times. The use of agrochemicals increased the yield and improved the nutritional value of broccoli inflorescences. The treatments with mineral fertilization(2, 3, 4 and 5) the treatment 2 (Background N100P60K160) provided the greatest return. The application of the studied agrochemicals resulted in the negative (acidification, binding of phosphorus, calcium and magnesium) and positive (increase in the content of elements) effects. The immobilization of nutrients (phosphorus, calcium, magnesium) in poorly soluble soil compounds and the respective decrease in the content of the elements’ mobile forms did not have a negative effect on the elemental composition of broccoli inflorescences. Thus, chemical immobilization, leading to the fixation of nutrients in the upper soil horizon, prevents their leaching by melt- and rainwater into the lower horizons.

scholarly journals The Influence of Mineral Fertilization on the Distribution of Nutrients in the Soil

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Daniela PáŽSLEA ◽  
Florin SALA
Keyword(s):  
Soil Profile ◽  
Soil Horizon ◽  
Mineral Fertilizers ◽  
Chemical Characteristics ◽  
Strong Positive Correlation ◽  
Weak Correlation ◽  
Mineral Fertilization ◽  
Agricultural Yield ◽  
S Fertilizers ◽  
Different Doses

An important factor in sustaining agricultural yield, mineral fertilization is at the same time one of the factors that causes changes in the chemical characteristics of the soils. Nutriment mobility in the soil is different: it is higher in the nitrogen case and lower in that of phosphorus’. We assessed the changes in the macroelement content of the upper soil horizon when applying mineral fertilizers on winter wheat crops. We tested different doses and combinations of complex mineral fertilizers, NPK (S) fertilizers with zinc [15/15/15(+3+Zn)] and ammonium nitrate (35:0:0). The determinations were made for two depths, 0 - 10 cm and 10 - 20 cm, in order to observe the mobility of the nutrients for each soil profile. Nitrogen content vacillates between 0.15 - 0.25% ± 0.008 for 0 - 10 cm depth and 0.16 - 0.23% ± 0.006. Phosphorus is found between 25.8 - 54.64 ppm ± 3.109 for a depth of 0 - 10 cm and 30.8 - 28.14 ppm ± 1.406 for 10 - 20 cm. Potassium content varies between 193.8 - 384.64 ppm ± 25.627 for the depth of 0 - 10 cm and 205.45 - 327.14 ppm ± 15.135 for the depth of 10 - 20 cm. While analysing the results on the macroelement content and mobility in the soil horizon under research in terms of multiple correlations, we got very strong positive correlation for nitrogen and potassium and weak correlation for phosphorus.

Effects of Liming and Fertilization on the Dehydrogenase and Catalase Activities

2019 ◽  
Vol 70 (10) ◽  
pp. 3464-3468
Author(s):  
Alina Dora Samuel ◽  
Simona Bungau ◽  
Ilona Katalin Fodor ◽  
Delia Mirela Tit ◽  
Cristian Felix Blidar ◽  
...  
Keyword(s):  
Soil Quality ◽  
Catalase Activity ◽  
Low Dose ◽  
Farmyard Manure ◽  
Enzymatic Activities ◽  
Mineral Fertilizers ◽  
Mineral Fertilization ◽  
Favorable Conditions ◽  
Npk Fertilization

In this paper we provide new data about the soil enzyme activity as a biological process, which is an indicator for impacts of factorial combinations of lime and fertilizers applications. Five plots divided into fifteen subplots were sampled for determination of the enzymatic indicators of soil quality, based on the actual and potential dehydrogenase and catalase activities. The research revealed that limed soil samples, in comparison with unlimed ones, resulted in significantly higher soil enzymatic activities (p[0.05) in the upper (0-20 cm), while in the deeper (20-40 cm) layer, only catalase activity was significantly higher (at least at p[0.02). Mineral fertilization, in comparison with its farmyard manuring, led to an insignificant increase in each of the three enzymatic activities determined, excepting catalase activity which was significantly higher (0.05]p]0.02) in the 0-20 cm layer. Based on the absolute values of the enzymatic activities, the enzymatic indicators of soil quality (EISQ) were calculated. The mineral NPK-fertilization and low dose of lime in the 0-20 cm layer, and mineral NP-fertilization and low dose of lime in the 20-40 cm layer proved to be the best variants of fertilization. The enzymatic indicators of soil quality in these variants reached the highest values: EISQ=0.821 and EISQ=0.889, respectively, indicating the presence of high enzymatic activities. It should be emphasized that a balanced application of lime, mineral fertilizers and farmyard manure leads to the formation of favorable conditions for the development of microorganisms, growth of plants and for an intense and lasting enzymatic activity.

scholarly journals Spatio-Temporal Changes of Urban Forests and Planning Evolution in a Highly Dynamical Urban Area: The Case Study of Wrocław, Poland

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 17 ◽  
Author(s):  
Justyna Jaworek-Jakubska ◽  
Maciej Filipiak ◽  
Adam Michalski ◽  
Anna Napierała-Filipiak
Keyword(s):  
World War Ii ◽  
Urban Forest ◽  
Urban Forests ◽  
Spatial Dimension ◽  
Temporal Changes ◽  
City Centre ◽  
Socialist Economy ◽  
Urban Green Spaces ◽  
Spatio Temporal ◽  
The City

Knowledge about urban forests in Poland is still limited, as it is primarily based on aggregate, formal data relating to the general area, ignoring the spatial dimension and informal green areas. This article describes and analyses spatio-temporal changes in the actual urban forest resources in Wrocław in 1944–2017, which covers the first period of the city’s rebuilding after its destruction during World War II and its development during the nationalised, centrally-planned socialist economy, as well as the second period of intensive and only partly controlled growth under conditions of market economy. The study is based on current and historical orthophotomaps, which were confronted with cartographic data, as well as planning documents. We found that between 1944 and 2017, the percentage contribution of informal woodlands increased tenfold (from 0.5 to 4.9% of the present total area of the city). The area occupied by such forests has grown particularly during the most recent years of the city’s intensive development. However, the forests have been increasingly fragmented. During the first period, new forest areas were also created in the immediate vicinity of the city centre, while during the second one, only in its peripheral sections. The post-war plans regarding the urban green spaces (UGS), including the current plan, are very conservative in nature. On the one hand, this means no interference with the oldest, biggest, and most valuable forest complexes, but on the other hand, insufficient consideration of the intensive built-up area expansion on former agriculture areas. Only to a limited extent did the above-mentioned plans take into account the informal woodlands, which provide an opportunity for strengthening the functional connectivity of landscape.

scholarly journals Spatio-temporal changes in the six major glaciers of the Chitral River basin (Hindukush Region of Pakistan) between 2001 and 2018

2020 ◽  
Vol 17 (3) ◽  
pp. 572-587
Author(s):  
Jawaria Gul ◽  
Sher Muhammad ◽  
Shi-yin Liu ◽  
Siddique Ullah ◽  
Shakeel Ahmad ◽  
...  
Keyword(s):  
River Basin ◽  
Temporal Changes ◽  
Spatio Temporal
Sign in / Sign up

Export Citation Format

Share Document