scholarly journals Soil microbial biomass under mulch types in an integrated apple orchard from Southern Brazil

2011 ◽  
Vol 68 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Denice de Oliveira Almeida ◽  
Osmar Klauberg Filho ◽  
Henrique Cesar Almeida ◽  
Luciano Gebler ◽  
Aline Franciane Felipe
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Apple Orchard ◽  
Southern Brazil ◽  
Pine Needle ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial ◽  
Microbial Nitrogen ◽  
Microbial Carbon ◽  
Black Plastic

The use of mulching is an alternative to control weeds but there are few studies on its effect on soil quality. In this sense, this study aimed to evaluate the effect of types of mulching on the attributes of microbial carbon, nitrogen and phosphorus in a Typic Hapludox with production of integrated apples in southern Brazil. The experiment was conducted in randomized blocks in the Vacaria, state of Rio Grande do Sul, southern Brazil. The soil mulch types studied were: pine needle, sawdust, black plastic and a control. The soil samples were collected in February (summer) and August (winter) of 2006, and the attributes related to total organic and microbial carbon, nitrogen and phosphorus were determined. Organic mulchings (pine needle and sawdust) promoted lower soil temperature, and greater moisture, microbial carbon (Cmic), microbial nitrogen (Nmic), and the ratios Cmic:Corg, Nmic:Norg and microbial C:N than black plastic. Microbial phosphorus was greater in winter. Sawdust mulching promoted the best conditions to microbial biomass in winter. The mulch types increased the microbial compartment in winter as compared to the nonweeded control .

scholarly journals Ratio of soil microbial biomass carbon to soil organic carbon in Himalayan rangeland

2018 ◽  
Vol 2 ◽  
pp. 96-101
Author(s):  
Dil Kumar Limbu ◽  
Madan Koirala
Keyword(s):  
Organic Matter ◽  
Microbial Biomass ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Biomass Carbon ◽  
Soil Microbial ◽  
Soil Microbial Biomass Carbon ◽  
Microbial Carbon

The soil microbial biomass carbon to soil organic carbon ratio is a useful measure to monitor soil organic matter and serves as a sensitive index than soil organic carbon alone. Thus, the objective of this study is to identify and quantify the present status of ratio of soil microbial biomass carbon to soil organic carbon in Himalayan rangeland and to make recommendations for enhancing balance between microbial carbon and organic carbon of the soil. To meet the aforementioned objective, a field study was conducted from 2011 to 2013 following the Walkley-Black, Chromic acid wet oxidation method, and chloroform fumigation method for analysis of microbial carbon and organic carbon respectively. The study showed that the heavily grazed plot had significantly less value of ratio than occasionally grazed and ungrazed plots. The ratio was significantly high on legume seeding plot compared to nonlegume plot, but the ratio was independent of soil depth. Soil microbial biomass appeared to be more responsive than soil organic matter.

Spatial heterogeneity of soil microbial biomass carbon, nitrogen, and phosphorus in sloping field in a groge Karst region, Southwest China

2014 ◽  
Vol 34 (12) ◽  
Author(s):  
范夫静 FAN Fujing ◽  
黄国勤 HUANG Guoqin ◽  
宋同清 SONG Tongqing ◽  
曾馥平 ZENG Fuping ◽  
彭晚霞 PENG Wanxia ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Spatial Heterogeneity ◽  
Soil Microbial Biomass ◽  
Southwest China ◽  
Microbial Biomass Carbon ◽  
Karst Region ◽  
Biomass Carbon ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial ◽  
Sloping Field

Spatial heterogeneity of soil microbial biomass carbon, nitrogen, and phosphorus in sloping farmland in a karst region on the Yunnan-Guizhou Plateau

2012 ◽  
Vol 32 (7) ◽  
pp. 2056-2065
Author(s):  
张利青 ZHANG Liqing ◽  
彭晚霞 PENG Wanxia ◽  
宋同清 SONG Tongqing ◽  
邹冬生 ZOU Dongsheng ◽  
曾馥平 ZENG Fuping ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Spatial Heterogeneity ◽  
Soil Microbial Biomass ◽  
Microbial Biomass Carbon ◽  
Karst Region ◽  
Biomass Carbon ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial ◽  
Sloping Farmland ◽  
Guizhou Plateau

scholarly journals Preliminary Studies on Microbial Biomass and the Microarthropod Community as Soil Health and Quality Indicators in Urban Grasslands, Rīga as an Example / Sākotnējie Pētījumi Par Augsnes Mikrobiālo Biomasu Un Augsnes Sīkposmkāju Sabiedrībām Kā Augsnes Veselības Un Kvalitātes Indikatoriem Rīgas Pilsētas Urbānajos Zālājos

2015 ◽  
Vol 69 (3) ◽  
pp. 140-144
Author(s):  
Sandra Minova ◽  
Līga Jankevica ◽  
Ineta Salmane ◽  
Gunta Čekstere
Keyword(s):  
Microbial Biomass ◽  
Urban Areas ◽  
Soil Microbial Biomass ◽  
Soil Health ◽  
Anthropogenic Pollution ◽  
Soil Microbial ◽  
Rail Network ◽  
Microbial Carbon ◽  
Building Characteristics

Abstract Anthropogenic pollution is considered as a one of the main factors that affects soil in urban areas. In 2014, soil quality of grasslands in Rīga was determined. The aim of the study was to determine microbial biomass and describe microarthropod communities in soils of different grasslands in Rīga city and to assess their use as indicators of soil health and quality of the urban environment. Six sampling plots with different building characteristics, density of street and rail network and transport load, and potential impact of pollution were selected for studies. The substrate-induced respiration method was used for determination of soil microbial biomass. Soil invertebrates were collected in sampling plots. Soil Mesostigmata mites, Oribatida and Collembola were extracted from samples and counted. In total over 9300 soil microarthropod individuals were recorded, of them 4500 Collembola, 3400 Oribatida and 1400 Mesostigmata mites. Statistically significant differences in soil microbial biomass among sampling sites were observed. Soil microbial carbon content significantly increased in most of sampling plots from July to October. To obtain more precise results in the future some modifications and optimisation of the standard method based on indicators will be necessary.

scholarly journals Carbon and phosphorus biogeochemical cycles in native forest and horticultural areas in the Metropolitan Region of Curitiba, Brazil

2021 ◽  
Vol 17 (3) ◽  
pp. 01-11
Author(s):  
Tatiana Suzin Lazeris ◽  
Jéssica Pereira de Souza ◽  
Fabiane Machado Vezzan ◽  
Caroline Lima de Matos ◽  
Glaciela Kaschuk
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Organic Phosphorus ◽  
Biogeochemical Cycles ◽  
Metropolitan Region ◽  
Available Phosphorus ◽  
Native Forest ◽  
Phosphate Solubilizing Bacteria ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial

This study was carried out to understand the dynamics of carbon and phosphorus biogeochemical cycles in native forest and horticultural areas. Soilsamples were collected from native forest and horticultural areas, in four municipalities in the Metropolitan Region of Curitiba, Brazil, and evaluated for: carbon, nitrogen and phosphorus of soil microbial biomass (MBC, MBN and MBP, respectively), total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), inorganic phosphorus (iP), organic phosphorus (oP) and available phosphorus (aP. Soil suspensions diluted at 10-4were spread on plates and phosphate solubilizing bacteria (PSB) were counted. The analyses showed that horticultural areas soils accumulated 43% more TP whereas they lost 23% of TOC and 19% of TN comparing to native areas. 69% of TP in the native areas was organic (oP) whereas 59% of TP in the horticultural areas was inorganic (iP). Horticultural areas had lower numbers of colony forming unities of PSB than native areas. PSB was positively correlated with the ratio of MBC to TOC (qMic), which in turn, was negatively correlated with TOC and TN. Changes in the soil P fractions suggested a shift inthe soil community bacterial structure and in the values of soil microbial biomass of the two different soil ecosystems. The excessive P addition may stimulate soil microbial attack to soil organic matter reserves, whichmay have consequences for maintenance of soil quality and agriculture sustainability

scholarly journals Changes of Soil Microbiological Properties during Grass Litter Decomposition in Loess Hilly Region, China

2018 ◽  
Vol 15 (9) ◽  
pp. 1797
Author(s):  
Yun Xiang ◽  
Shaoshan An ◽  
Man Cheng ◽  
Lijun Liu ◽  
Ying Xie
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Soil Microbial Biomass ◽  
Change Rate ◽  
Carbon And Nitrogen ◽  
Soil Microbial ◽  
Microbial Carbon ◽  
Microbiological Properties

Litter, the link between soil and plant, is an important part of nutrient return to soil. Deeply understanding the effect of litter decomposition on soil microbiological properties is important for the sustainable development of grasslands. Three plants (Thymus quinquecostatus Celak., Stipa bungeana Trin. and Artemisia sacrorum ledeb.) leaf litter were selected. A simulation experiment using the nylon bag method was conducted to measure the soil microbial biomass carbon and nitrogen, and soil enzyme activity during litter decomposition. The results showed that the decomposition of three leaf litter enhanced soil microbial carbon and nitrogen. The change rate of soil microbial carbon and nitrogen decreased as Ar.S > St.B > Th.Q. The activities of soil invertase, soil urease, and soil nitrate reductase were significantly improved by the coverage of leaf litter. After 741-day litter decomposition, the change rate of soil invertase was from 16.7% to 33.2%. The change rate of soil urease was highest in the Th.Q treatment; St.B treatment and Ar.S treatment followed, and lowest in the control. The change rates of soil nitrate reductase in the St.B and Ar.S treatment were >1000% higher than those of other treatments. The response of soil enzyme activity to litter decomposition “lagged” behind the change of soil microbial biomass. The significant increase of soil microbial biomass and enzyme activity demonstrated that litter decomposition played an important role in maintaining soil ecological function.

Sign in / Sign up

Export Citation Format

Share Document