scholarly journals Removal Mechanisms of Slag against Potentially Toxic Elements in Soil and Plants for Sustainable Agriculture Development: A Critical Review

2021 ◽  
Vol 13 (9) ◽  
pp. 5255
Author(s):  
Sajid Mehmood ◽  
Xiukang Wang ◽  
Waqas Ahmed ◽  
Muhammad Imtiaz ◽  
Allah Ditta ◽  
...  

Potentially toxic element (PTE) pollution is a major abiotic stress, which reduces plant growth and affects food quality by entering the food chain, and ultimately poses hazards to human health. Currently, the use of slag in PTE-contaminated soils has been reported to reduce PTEs and toxicity in plants. This review highlights the role of slag used as a fertilizer for better crop production and sustainable agricultural development. The application of slag increased the growth, yield, and quality of crops under PTE toxicity. The mechanisms followed by slag are the immobilization of PTEs in the soil, enhancement of soil pH, changes in the redox state of PTEs, and positive changes in soil physicochemical and biological properties under PTE toxicity. Nevertheless, these processes are influenced by the plant species, growth conditions, imposition length of stress, and type of slag used. The current review provides an insight into improving plant tolerance to PTE toxicity by slag-based fertilizer application and highlights the theoretical basis for applying slag in PTE-contaminated environments worldwide.

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2257
Author(s):  
Rajan Bhatt ◽  
Jagdish Singh ◽  
Alison M. Laing ◽  
Ram Swaroop Meena ◽  
Walaa F. Alsanie ◽  
...  

Groundwater and soil potassium deficiencies are present in northern India. Sugarcane is a vital crop in the Indian Punjab; it is grown on approximately 91,000 hectares with an average yield of 80 tonnes ha−1 and a sugar recovery rate of 9.59%. The role of potassium (K) fertilizer under both sufficient and deficient irrigation in ratoon sugarcane crops is not well documented. We conducted a split-plot ratoon cane experiment during 2020–2021 at the Gurdaspur Regional Research Station of Punjab Agricultural University, India, on K-deficient soils. Main treatments were fully irrigated (I1) and water stressed (I0) conditions, with sub-treatments reflecting K fertilizer application rates of 0 (M1), 67 (M2), 133 (M3), and 200 (M4) kg K ha−1. The ratoon sugarcane performance was assessed in terms of growth, productivity, sugar quality and incidence of key insect pests. At harvest, trends in the growth and yield parameters in I1 were improved over the I0 treatment, with cane height (+12.2%), diameter (+3.3%), number of internodes (+5.4%), biomass yield (+7.6%) and cane yield (+5.9%) all higher, although little significant difference was observed between treatments. Ratoon cane yield under irrigation was 57.1 tonnes ha−1; in water-stressed conditions, it was 54.7 tonnes ha−1. In terms of sugarcane quality parameters, measured 12 months after harvesting the initial seed crop, values of Brix (+3.6%), pol (+3.9%), commercial cane sugar percentage (+4.0%) and extractable sugar percentage (+2.8%) were all higher in the irrigated treatments than the water-stressed plot. Irrigated treatments also had a significantly lower incidence of two key insect pests: top borer (Scirpophaga excerptalis) was reduced by 18.5% and stalk borer (Chilo auricilius) by 21.7%. The M3 and M4 treatments resulted in the highest cane yield and lowest incidence of insect pests compared to other K-fertilizer treatments. Economic return on K-fertilizer application increased with increasing fertilizer dosage. Under the potassium-deficient water-stressed conditions of the region of north India, a fertilizer application rate of 133 kg K ha−1 is recommended to improve ratoon sugarcane growth, yield, and quality parameters and economic returns for sugarcane farmers.


2017 ◽  
Vol 5 (11) ◽  
pp. 400-413
Author(s):  
Babajide Peter ◽  
OpasinaIfeoluwa ◽  
Ajibola Adijat ◽  
Noah ◽  
Oyedele Temitope ◽  
...  

It is not unreasonable to state that, even before the introduction of organic agriculture, African local farmers have numerous of undocumented environment-friendly, nature-inclined indigenous techniques for boosting soil fertility and enhancing crop yield. However, despite the versatility of indigenous knowledge, setback is always experienced from western science, which tags such knowledge as being non-scientific and not worthy of scholarly engagements. A field experiment was carried out in the year 2013, at the Teaching and Research Farms, LadokeAkintola University of Technology, Ogbomoso, to assess the soil fertility and yield promoting potentials of some indigenous plant species’ botanicals used as pre-planting treatments on different maize varieties. It was a 3 by 5 factorial experiment. The treatments introduced were: Three (3) maize varieties (V1 = ACR-DMR-SR-Y, V2 = Local EM-W and V3 = Suwan Solo Yellow and five (5) other treatments (comprising pre-sowing botanical treatments of: Kigeliaafricana only, Glyphea brevis only, combination of Kigeliaafricana and Glyphea brevis only, NPK fertilizer application (as a reference) and the control (treated with ordinary water only). The trial was laid out in Split Plot in Randomized Complete Block Design (RCBD), replicated three times. Data were collected on growth and yield parameters, and the data collected were analysed using analysis of variance (ANOVA). Means were compared using Duncan Multiple Range Test (DMRT). All the botanical treatments significantly influenced germination, growth, yield and nutrient uptakes of maize, compared to the control. Either of the botanicals tested (with ordinary basal manure application of the pre-existing plant residues on the field), competed effectively with NPK fertilized plants. Hence, since maize responded better to sole treatments of either Kigeliaafricana or Glyphea brevis extracts, irrespective of varieties than the combined treatment of the two botanicals, any of the maize varieties is therefore recommended as being suitably compatible with either of the sole botanical treatments, in the study area. Thus, this research is reasonable, particularly in the aspects of fertilizer economy, environment-friendliness, organic farming and more profitable crop production in the tropics, where soils are continuously cropped and marginal.


2018 ◽  
Vol 75 (3) ◽  
pp. 399
Author(s):  
Aroosa Khalil ◽  
M.K. Sharma ◽  
Nowsheen Nazir ◽  
A.S. Sundouri

Author(s):  
Goran Rajović ◽  
Jelisavka Bulatović

The subject of this paper is to consider the causes of the condition and systematization of the main problems of agricultural development in Montenegro. Bearing in mind the structure of agricultural production, available resources and achieved the level of productivity, we estimate that the change must take place in the direction of growth, yield stabilization and production structure changes in crop production and achieving greater representation of livestock in the value of agricultural production. The future development of the agrarian sector of Montenegro should be directed towards modernizing and changing the production structure towards market orientation and improve overall efficiency. Agriculture Montenegro in its very important role, should fulfill several strategic objectives: produce sufficient amounts of safe food that will be accepted by consumers at home and abroad, provide a higher level of self-sufficiency and improve the trade balance of the country, creating value that will provide income to farmers and the gross domestic product growth magnify the overall economy of the country and to keep population in the countryside and thus contribute to the protection and promotion of these areas.


2017 ◽  
Vol 9 (2) ◽  
pp. 812-820
Author(s):  
N. B. Ghube ◽  
A. D. Kadlag ◽  
B. M. Kamble

A field experiment was conducted at soil test crop response (STCR) correlation project farm of Mahatma Phule Krishi Vidyapeeth, Rahuri Maharashtra.The result showed that individual application of nitrogen (N), phosphorus(P),potassium(K) or organic nutrient sources (Farm yard manure) recorded less value of preseasonal sugarcane ratoon but the integration of both the sources showed significantly improved all the growth, yield and quality parameters of preseasonal sugarcane ratoon. The maximum number of internodes were ranged between 21-30 with mean of 25.42, number of leaves 6-10 with mean of 7.21, length of internodes 12.50-16.80 cm with mean of 14.41 cm, girth of internodes 11.30-13.10 cm with mean of 12.15 cm and height of millable cane 335-385 with mean of 351.75 cm, respectively were found higher with application of residual effect of 30 t ha-1 farm yard manure (FYM). However, the quality traits viz., brix ranged from 18.70 to 22.80 with mean of 19.87, pol per cent ranged from 15.81 to 18.41 per cent with mean of 17.53 per cent and commercial cane sugar (CCS) per cent from 9.39 to 12.09 per cent with mean of 10.76 per cent. The CCS yield was ranged between 9.58-16.30 MT ha-1 with mean value of 14.13 MT ha-1were enhanced considerably with residual 15 and 30 t FYM ha-1 blocks over without FYM. The application of organic and inorganic fertilizers will not only enhance the growth, yield and quality of preseasonal sugarcane ratoon but also conserve agro-ecosystem for sustainable crop production.


Author(s):  
Philip Ghanney ◽  
Joseph Xorse Kugbe ◽  
Benjamin Kongyeli Badii

Soil impoverishment remains a major constraint to food crop production in the Guinea Savanna agroecology of Ghana. Most soils identified in this ecology are fragile and deficient in nutrients due to inappropriate management practices. To resolve this challenge, field studies were conducted to assess the polycultural productivity of maize as affected by tillage practices, fertilizer rates and intercropping systems. The study was however conducted in two cropping seasons (2016 and 2017) at Yagaba in the Mamprugu Moaduri District of Northern Ghana. Treatments consisting of 2 tillage practices (direct seeding and ploughing), 2 fertilizer application rates (zero rate [0-0-0 kg/ha NPK] and recommended rate [60-30-30 kg/ha NPK]) and 3 intercropping systems (sole maize, cowpea [Vigna unguiculata L. Walp] and soybean [Glycine max L.]) were factorially examined in three replications using randomized complete block design. Although the maize responded differently to the varied treatments, its exposure to ploughing, 60-30-30 kg/ha fertilizer rate and soybean intercropping system were in general influential in enhancing vegetative growth, yield and yield components. The responsiveness of maize to ploughing and 60-30-30 kg/ha fertilizer rate increased grain yield by 8.60% and 37.68%, respectively than their untreated controls. Regardless of not directly supplying the intercrops with the inorganic fertilizer, nodulation count and effectiveness of cowpea and soybean were improved under ploughed fields treated with 60-30-30 kg/ha fertilizer rate. The combined impact of ploughing, 60-30-30 kg/ha fertilizer rate and soybean integration resulted in higher profit returns. Hence, this study recommends to small-holder farmers in the Guinea Savannah agroecology of Ghana to adapt to the implementation of ploughing, 60-30-30 kg/ha fertilizer rate and soybean intercropping system for yield improvement and profit maximization.


2022 ◽  
Vol 82 ◽  
Author(s):  
M. Azam ◽  
R. Qadri ◽  
A. Aslam ◽  
M. I. Khan ◽  
A. S. Khan ◽  
...  

Abstract The experiment was carried out on mango cv. Dusehri to investigate the effect of N, P and K fertilizers on vegetative, reproductive growth, yield and fruit quality. Eight different fertilizer combinations such as T1 (control), T2 (N), T3 (P), T4 (K), T5 (NP), T6 (NK), T7 (PK) and T8 (NPK) were used. Individual or combine fertilizer application of N (1000 g), P (750 g) and K (750 g) were applied during growing season in February and August. All the treatments significantly influenced on vegetative growth, flowering, fruiting, yield and other physiochemical attributes of mango as compared to control. Least effect was observed with individual fertilizer application while combine fertilizer treatments enhanced most of the investigated parameters. Especially, qualitative traits showed non-significant differences between treated and untreated mango trees. However, among the different treatments T8 (NPK) showed significance for fruiting aspects such as maximum size of growth flushes (177.51 mm), total number of panicles/tree (845), total number of flowers/panicle (974), sex ratio (69.18%), fruit retention (13.85%), total number of fruits/tree (379), yield (82 kg/tree), fruit weight (197.5 g), pulp weight (135.5 g) and physiochemical parameters namely TSS (24.53), Vit. C (57.63 mg/100 mL) and total sugar (20.84%). In general, combine application of NPK (T8) were the most effective in enhancing fruiting aspects, yield, physiochemical characteristics as well as improved fruit quality of mango trees.


Author(s):  
Philip Ghanney ◽  
Joseph Xorse Kugbe ◽  
Benjamin Kongyeli Badii ◽  
Daniel Asomning Odoom

Extensive areas of bare, compacted, and nutrient-poor soils hinder crop production in the Guinea Savannah Agro-ecological zone of Ghana. Resolving this challenge can be effected by developing sustainable land management strategies that can adequately improve soil nutrient status and enhance crop yield. Field studies were conducted to evaluate the productivity of cotton as affected by tillage practices, fertilizer rates and intercropping systems in the Guinea Savanna agroecology of Ghana, during the 2016 and 2017 cropping seasons. Treatments consisted of 2 tillage practices (ploughing and direct seeding [sole cotton]), 2 fertilizer application rates (54-30-30 kg/ha NPK and 0-0-0 kg/ha NPK) and 3 intercropping systems (sole cotton, cowpea intercrop and soybean intercrop) which were laid in split-split plot design with three replications. The tillage practices, fertilizer rates and the intercropping systems were respectively allocated as the main plot, sub-plot and sub-sub plot treatment respectively. Unlike the three-way interaction effect which did not significantly influence variation in growth, yield and yield components of cotton, the two-way interaction  and the single factors were however influential. The combined impact of the NPK fertilizer application rate at 54-30-30 kg/ha and ploughing resulted in higher seed yield of cotton. Comparatively, seed yield of cotton was 35.78% higher when 54-30-30 kg/ha fertilizer rate (1.29 t/ha) was applied compared with 0-0-0 kg/ha fertilizer rate (0.61 t/ha). It is however recommended that resource-poor farmers in the Guinea Savannah agro-ecological zone of Ghana adopt to the use of 54-30-30 kg/ha fertilizer rate and ploughing for cotton seed yield maximization.


Author(s):  
Goran Rajović ◽  
Jelisavka Bulatović

The subject of this paper is to consider the causes of the condition and systematization of the main problems of agricultural development in Montenegro. Bearing in mind the structure of agricultural production, available resources and achieved the level of productivity, we estimate that the change must take place in the direction of growth, yield stabilization and production structure changes in crop production and achieving greater representation of livestock in the value of agricultural production. The future development of the agrarian sector of Montenegro should be directed towards modernizing and changing the production structure towards market orientation and improve overall efficiency. Agriculture Montenegro in its very important role, should fulfill several strategic objectives: produce sufficient amounts of safe food that will be accepted by consumers at home and abroad, provide a higher level of self-sufficiency and improve the trade balance of the country, creating value that will provide income to farmers and the gross domestic product growth magnify the overall economy of the country and to keep population in the countryside and thus contribute to the protection and promotion of these areas.


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