Soil physico-chemical properties, biomass production, and root density in a green manure farming system from tropical ecosystem, North-eastern Brazil

2021 ◽  
Author(s):  
Gislaine dos Santos Nascimento ◽  
Tancredo Augusto Feitosa de Souza ◽  
Lucas Jónatan Rodrigues da Silva ◽  
Djail Santos
Keyword(s):  
Biomass Production ◽  
Green Manure ◽  
Chemical Properties ◽  
Farming System ◽  
Root Density ◽  
Tropical Ecosystem ◽  
Eastern Brazil ◽  
Physico Chemical ◽  
North Eastern

scholarly journals Cryptostegia Madagascariensis Alters the Litterfall and Nutrient Cycling of Litter Inputs in An Invaded Tropical Cambisol From North-Eastern Brazil

2021 ◽  
Author(s):  
Edjane Oliveira de Lucena ◽  
Tancredo Souza ◽  
Leonaldo Alves de Andrade ◽  
Lucas Jónatan Rodrigues da Silva ◽  
Lídia Klestadt Laurindo ◽  
...  
Keyword(s):  
Native Species ◽  
Chemical Properties ◽  
Nutrient Content ◽  
Riparian Areas ◽  
The North ◽  
Litter Decay ◽  
Eastern Brazil ◽  
North Eastern ◽  
Litter Deposition ◽  
Dry And Rainy Seasons

Abstract The invasive Cryptostegia madagascariensis occupies riparian areas covered by tropical Cambisols throughout the North-eastern Brazil however litter is known regarding its ability to impact litter inputs, and ecosystem processes. This study aimed to characterize the effects of the invader on the litter deposition, soil physical-chemical properties, litter nutrient content, and the litter decay rate in a Tropical Cambisol. Comparisons of native and invaded environments showed that C. madagascariensis alters the quantity of litter deposition during both dry and rainy seasons. In contrast to native species, C. madagascariensis litterfall displayed litter seasonal variation (rainy vs. dry season), however invaded sites had higher litter biomass compared to native sites. C. madagascariensis litter was enriched in soil organic matter, N, P, and K contents as compared to the native litter. Compared to native environments, invaded ones had significantly decreased soil temperature and soil water content. Results suggest that C. madagascariensis enhances litter and N, P, and K availability in ways that have potential to impact soil ecosystem in the Tropical Cambisols from Caatinga ecoregion, Brazil.

scholarly journals Nutrient Uptake and Physico : Chemical Properties of Soil Influenced by Organic and Inorganic Packages in Rice

2015 ◽  
Vol 3 (1) ◽  
pp. 80-84
Author(s):  
Dushyant Pandey ◽  
Shrikant Chitale ◽  
D Thakur
Keyword(s):  
Nutrient Uptake ◽  
Green Manure ◽  
Nutrient Management ◽  
Block Design ◽  
Rice Variety ◽  
Chemical Properties ◽  
Available Phosphorus ◽  
Randomized Block Design ◽  
Physico Chemical ◽  
Properties Of Soil

Field Study on Nutrient uptake and Physico – chemical properties of soil influenced by organic and inorganic packages in rice was carried out at Research Cum Instructional Farm IGKV., Raipur (C.G.) during kharif 2010 and 2011. The soil of experimental field was ‘Inceptisols’ (Matasi), which was low in nitrogen, medium in available phosphorus and potassium. The experiment was laid out in randomized block design with three replication. The treatments consisted of Basmati type rice variety viz. Kasturi Comprising organic, inorganic and integrated nutrient management. Treatment T1 (50% RDF + 50% N (CDM), T2 (100% N((1/3 rd each CDM +NC+CCR) T3 (100% N (1/3 rd each CDM + NC + CCR) + Green manure in rice), T4 100% N (1/3 rd each CDM + NC + CCR) +Deep summer ploughing), T5 (50% N(CDM)+RP+PSB+Azos.), T6 (100%N(1/3 rd each CDM+NC+CCR) + Azos.+ PSB) and T7 (100% RDF).among different nutrient management practiceshigher nutrient uptake in grain and straw were observed under treatment T7(100% RDF).followed by T1 (50% RDF + 50% N (CDM) an INM treatment.whereas water uptake was exceeding in100% N applied through 1/3 rd each CDM + NC + CCR + Green manure in rice. Bulk density, pH and EC were also exceeds in T7, except T6 (100% N CDM + NC + CCR + Azos + PSB) which has higher OC.

scholarly journals Hydrochemical variability of the ecosystem of the Gulf of Elbląg (north-eastern Poland)

Baltica ◽  
2016 ◽  
Vol 29 (2) ◽  
pp. 121-132 ◽  
Author(s):  
Roman Cieśliński
Keyword(s):  
Chemical Properties ◽  
Vistula Lagoon ◽  
Measurement Point ◽  
Physico Chemical ◽  
North Eastern ◽  
Vistula Delta ◽  
Hydrometeorological Conditions ◽  
The Vistula Lagoon

The Vistula Lagoon – one of the main recipients of the central and eastern parts of the Vistula delta – is not homogeneous in terms of its hydrodynamics and hydrochemistry. In the southern part a separate hydrographic object – the Gulf of Elbląg – can be delimited. This delimitation is due to different morphometric and hydrometeorological conditions that prevail in this part of the Vistula Lagoon. In order to determine the nature of the waters, measurements of the selected physico-chemical properties, including chlorides, as well as control hydrological measurements were performed in the years 1997–2007. The study area included the water of the Gulf of Elbląg, the estuary stretch of the Elbląg River, the watercourses flowing from the Elbląg Plateau and the polder areas surrounding the Gulf of Elbląg. One measurement point was located on the Vistula Lagoon. The chloride values in the Gulf of Elbląg ranged from 20 to 2015 mg·dm-3. The results may indicate that the Gulf of Elbląg is a reservoir under the hydrodynamic and hydrochemical influence of both the Vistula Lagoon and the watercourses in its mouth, as well as the Vistula delta and the Elbląg Plateau. They dictate the seasonal nature of the waters of the Gulf of Elbląg.

scholarly journals Vegetation Diversity and Soil Physico-chemical Properties Under Traditional Management of Rangeland in Eastern Ethiopia

2019 ◽  
Vol 11 (5) ◽  
pp. 515 ◽  
Author(s):  
Dargo Kebede Alemie ◽  
Haftay Hailu Gebremedhin
Keyword(s):  
Open Access ◽  
Species Composition ◽  
Biomass Production ◽  
Chemical Properties ◽  
Principal Component ◽  
Herbaceous Species ◽  
Vegetation Diversity ◽  
Eastern Ethiopia ◽  
Physico Chemical ◽  
Chemical Attributes

The changes of herbaceous vegetation (composition, diversity, richness, evenness, and biomass production) and soil physico-chemical attributes of Harshin rangelands, eastern Ethiopia were examined under continuously open grazed areas and three ages of enclosures group arranged along chronological sequence into: < 5 years (young), 5-10 years (mid) and > 10 years (old). The herbaceous species composition showed a clear pattern of difference between the enclosure and open access grazed areas with desirable species being more prevalent in the enclosures and the undesirable ones being dominant in the open access grazed areas. The principal component analyses (PCA) of herbaceous species composition were accounted distinct across the open grazing young, mid and old enclosure management types. The diversity, richness and biomass production of herbaceous species were significantly different in the study area. The principal component analysis (PCA) of soil physico-chemical attributes showed distinct separation in relation to open grazing and three age enclosure areas. Overall, we found that the increased biomass production in the old enclosures may threat the herbaceous species diversity by dominating by only few species and hence affected the plants which are susceptible for species inter-competition.

Short-Term Variability of Physico-Chemical Properties and pCO2 fluxes off Dhamra estuary from north-eastern India

2019 ◽  
Vol 47 (7) ◽  
pp. 1197-1208 ◽  
Author(s):  
Suchismita Pattanaik ◽  
Debeedatta Acharya ◽  
Rajesh Kumar Sahoo ◽  
Deepti Ranjan Satapathy ◽  
Chitta Ranjan Panda ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Eastern India ◽  
Short Term ◽  
Physico Chemical ◽  
North Eastern ◽  
North Eastern India ◽  
Short Term Variability

scholarly journals Overview of various crops used for green manure

2020 ◽  
Author(s):  
A.V. Prikhodko ◽  
◽  
N.V. Karaeva ◽  
Keyword(s):  
Organic Matter ◽  
Green Manure ◽  
Considerable Increase ◽  
Chemical Properties ◽  
Farming System ◽  
Physical And Chemical ◽  
Green Manure Crops ◽  
Soil Changes ◽  
Properties Of Soil ◽  
And Chemical Properties

The aim of our research was to determine the influence of different green manure crops on the process of organic matter entry into the soil, changes in physical and chemical properties of soil, etc. The yields of green mass of sweet clover and sainfoin were the highest – 29.1 and 27.1 t/ha, respectively. Triticale and rye surpassed these crops in the dry matter yield by 0.10-0.30 t/ha and in the organic matter entry into the soil by 0.16-0.36 t/ha. Incorporation of green manures into a farming system contributed to the increase in the amount of nitrogen that is available to the succeeding crop from 0.17 to 1.73 mg/100 g, or 10.4 times. The most considerable increase in the amount of nitrogen was after sainfoin (13.5 times more) and vetch (12.3 times higher). The higher Р2О5 and К2О content in the soil was observed after phacelia used for green manure (3.27 and 32.7, respectively).

scholarly journals Predictive physico-chemical model for soil quality index in a long-term green manure farming system at tropical conditions, North-eastern Brazil

2021 ◽  
Author(s):  
Gislaine dos Santos Nascimento ◽  
Tancredo Souza ◽  
Lucas Jónatan Rodrigues da Silva ◽  
Lídia Klestadt Laurindo ◽  
Djail Santos
Keyword(s):  
Soil Quality ◽  
Green Manure ◽  
Chemical Properties ◽  
Farming Systems ◽  
Soil Quality Index ◽  
Soil C ◽  
Physico Chemical ◽  
Tropical Conditions ◽  
C Stock

Abstract Soil quality index shed light on soil health and its capacity to sustain high primary production. It also can assist decision-making in farming systems by integrating this valuable product into soil management planning. However, the currently existing models are based on rather local data, and thus, there is a lack of predictive tools to monitor soil quality on farming systems at tropical conditions. We characterized soil physico-chemical properties, plant biomass production under a 6-year experiment in a sandy soil from Tropical ecosystem, using ten treatments: Brachiaria decumbens, Canavalia ensiformis, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Lablab purpureus, Mucuna pruriens, Neonotonia wightii, Pennisetum glaucum, and Stilozobium aterrimum. We found that most of the soil physico-chemical properties were correlated with each other by Pearson’s correlation analysis. On the other hand, RDA illustrated that shoot dry biomass was related to soil C stock, K+, macro- and microporosity. Soil pH, Al3+, Ca2+, Mg2+, K+, Olsen’s P, Na+, soil C stock, bulk density, microporosity, macroporosity, and permanent wilting point were the main factors driving primary production in our long-term study. Our findings suggest that: 1) a consecutive green manure practice without any input of fertilizers after 6 years changed positively by increasing soil fertility (e.g., Ca2+, Mg2+, K+ and Olsen’s P), and improving plant growth and soil quality in tropical savanna climate conditions; and 2) the 33 multivariate predictive models may provide a deeper view about the benefits of using plant species as green manure by creating positive plant-soil feedback thus promoting soil quality.

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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