total p
Recently Published Documents


TOTAL DOCUMENTS

933
(FIVE YEARS 310)

H-INDEX

42
(FIVE YEARS 5)

Author(s):  
Slamet Santosa ◽  
Eddy Soekendarsi ◽  
Dody Priosambodo ◽  
Abdul Hayat Kasim

Growing media that contain organic materials can provide nutrients and water for plants. This study analyzed the availability and effects of nutrients and water, N and P resorption, and growth of teak seedlings under drought stress. The growing medium was made from ultisol soil (M1), ultisol soil with husk charcoal (M2), ultisol soil with chicken manure (M3), and ultisol soil with compost (M4), then planted with teak seeds. Maintenance was conducted by field capacity watering for 30 days. Teak seedlings were treated with drought stress for 90 days. Based on the analysis, growing media total N ranged from 0.19 to 0.28%, total P ranged from 0.10 to 0.17%, and water ranged from 11.40 to 16.20%. Teak seedling leaves contain N nutrient ranging from 0.34 to 0.95 % and P nutrient ranging from 0.04 to 0.16 %. The N resorption ability of teak seedlings ranged from 26 to 31%, and P resorption was around 20 to 25 %. The height growth of teak seedlings ranged from 80 to 115cm, the stem diameter from 1.4 to 1.8cm, the leaf area from 630 to 650cm2, and the thickness of the leaves from 545 to 462µm. Growing media made from ultisol soil and chicken manure (M3) produced the best water content, N and P resorption, and the growth of teak seedlings after 3 days of drought stress.


Tomography ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 77-88
Author(s):  
Giuseppe Brescia ◽  
Giacomo Contro ◽  
Alessandra Ruaro ◽  
Anna Chiara Frigo ◽  
Umberto Barion ◽  
...  

This study investigated the relationship between sinonasal inflammatory involvement according to the computed tomography (CT) staging system (Lund–Mackay score) with clinical, laboratory, histopathological and prognostic features of chronic rhinosinusitis with nasal polyps (CRSwNP). Seventy-eight patients with CRSwNP who had undergone surgery were enrolled. Total (p = 0.0062), ethmoid (p = 0.0496), sphenoid (p = 0.0335), ostiomeatal complex (OMC) (p = 0.0235) and frontal (p = 0.0164) CT scores were predictive of non-steroidal anti-inflammatory drugs-exacerbated respiratory disease (NERD) in the univariate analysis. Total (p = 0.0022), ethmoid (p = 0.0290), sphenoid (p = 0.0370), frontal (p = 0.0116), maxillary (p = 0.0357) and OMC (p = 0.0058) CT scores were predictve of asthma at the univariate analysis. No significant differences were found between patients with vs. without allergy in terms of total and partial CT scores. High blood eosinophil counts (>0.24 vs. ≤0.24 cells × 109/L) resulted in being associated with total (p = 0.0213), maxillary (p = 0.0227) and ethmoid (p = 0.0491) CT scores in the univariate analysis. Higher ethmoid (p = 0.0006) and total sinonasal (p = 0.0027) CT scores were found to predict histopathologically eosinophil CRSwNPs in the univariate analysis. CT scores did not result as predictive of NSAID-exacerbated respiratory disease, asthma, or blood eosinophil count at the multivariate analysis. Risk of relapse was related to the presence of NERD (p = 0.0207, HR [95% CI] 3.914 [1.232–12.435]), higher preoperative total (HR = 1.098 95%CI: 1.001–1.204, p = 0.0486) and frontal sinus CT scores (HR = 1.555 95%CI: 1.006–1.886, p = 0.0218), but these results were not confirmed by the multivariable analysis. Sinonasal CT scores showed significant differences in this heterogeneous inflammatory condition. Identifying CRSwNP characteristics is necessary to avoid generic treatments with poor outcomes.


2022 ◽  
Vol 9 (1) ◽  
pp. 21-27
Author(s):  
P Purwanto ◽  
Yulia Nuraini ◽  
Nurul Istiqomah

The aim of this study was to explore the effect of a combination of manure and inorganic fertilizer (NPK and Urea) on the population of phosphate-solubilizing bacteria and the yield of maize. The study was carried out from June to October 2018 in the Kemantren Village, Alas Kulak Hamlet, Jabung District, Malang Regency. This study used a randomized block design consisting of 8 treatment levels and repeated three times. The results of the analysis of variance showed that the application of a combination of compost, fertilizer (NPK and Urea) gave significantly different results to the population of phosphate solubilizing bacteria C-organic, P-total, P-available, dry shelled weight and stover weight. The treatment of 2 t ha-1 compost + 100 kg ha-1 NPK + 50 kg gave the highest yield for the population of phosphate solubilizing bacteria with a value of 61×104 CFU.g-1. Maize production yields obtained treatment of 2 t ha-1 of compost + 400kg.ha-1NPK + 200 kg.ha-1 Urea reached a value of 8.65 t ha-1.


Jurnal Agro ◽  
2022 ◽  
Vol 8 (2) ◽  
pp. 299-310
Author(s):  
Mieke Rochimi Setiawati ◽  
Lia Nur Linda ◽  
Nadia Nuraniya Kamaluddin ◽  
Pujawati Suryatmana ◽  
Tualar Simarmata

Inceptisols umumnya memiliki tingkat kesuburan tanah rendah sampai sedang. Upaya peningkatan ketersediaan hara tanah Inceptisol dengan pupuk anorganik NPK perlu diimbangi dengan aplikasi pupuk hayati dan amelioran organik. Percobaan ini bertujuan untuk mengurangi dosis pupuk NPK dengan menggunakan pupuk hayati dan amelioran organik serta meningkatkan hasil tanaman jagung. Percobaan dilakukan di Pasir Banteng, Kabupaten Sumedang. Penelitian menggunakan RAK faktorial. Pupuk hayati dengan amelioran organik sebagai faktor pertama sebanyak empat taraf: tanpa pupuk hayati dan amelioran (kontrol), diberi pupuk hayati, amelioran organik, dan gabungan keduanya. Faktor kedua yaitu dosis pupuk NPK empat taraf: 100%, 80%, 60%, 40% NPK dosis anjuran.  Dilakukan tiga kali ulangan. Hasil penelitian menunjukkan terdapat interaksi antara pupuk hayati, amelioran organik, dengan pupuk NPK terhadap tinggi tanaman, N-total tanah, bobot tongkol berkelobot dan tanpa kelobot. Pemberian pupuk hayati dan amelioran disertai pupuk NPK 100% dan yang tanpa diberi amelioran menghasilkan bobot tongkol tanpa kelobot sebesar 1.089 g dan 1.064 g per tanaman. Pemberian pupuk hayati dengan amelioran dan pemberian pupuk NPK 100% menghasilkan bobot pipilan per tanaman 526,08 g dan 539,08 g. Aplikasi pupuk hayati dan amelioran organik belum mampu mengurangi dosis penggunaan pupuk NPK pada Inceptisols asal Pasir Banteng. Inceptisols generally have low to moderate soil fertility. The effort to increase the nutrients availability in Inceptisol through the application of NPK fertilizers need to be balanced with biofertilizers and organic ameliorants. This experiment aimed to reduce the dose of NPK fertilizer by using biofertilizers and organic ameliorants and to increase maizeyields. The experiment was conducted in Pasir Banteng, Sumedang Regency. The factorial RBD was used. The biofertilizer with organic ameliorant as the first factor: no biofertilizer and no ameliorant (control), biofertilizer, organic ameliorant, and combination of both. The second factor was dose of NPK fertilizer: 100%, 80%, 60%, 40% of recommended NPK dose. It was repeated three times. The results showed that there was interaction between biofertilizer, organic ameliorants, with NPK fertilizers on plant height, N-total soil, weight of cobs with and without husk. The application of biofertilizer and ameliorant with 100% NPK fertilizer and without ameliorant were 1,089 g and 1,064 g of cobs without husks, respectively. The application of biofertilizer with ameliorant and 100% NPK fertilizer had a grain weight of 526.08 g and 539.08 g, respectively. The application of biofertilizers and organic ameliorants has not been able to reduce the dose of NPK fertilizer on Inceptisols from Pasir Banteng.


2021 ◽  
Vol 34 (1) ◽  
pp. 1-10
Author(s):  
Scheybi Teresa Miralda Méndez
Keyword(s):  

Objetivo.- Identificar los factores de riesgo asociados a sepsis en pacientes pediátricos sometidos a Cateterismo Venoso Central. (CVC).Material y Métodos.- Estudio prospectivo que incluyó 54 pacientes pediátricos mayores de 28 días, ingresados y sometidos a Cateterismo Venoso Central en la Unidad de Cuidados Intensivos Pediátricos y Sala de Emergencias del Hospital Escuela en el período de Julio 2012- junio 2013. Resultados.- Fue más frecuente el sexo femenino con proporción 2.2:1.0, la media general fue 92.33 meses ±70.7, predominando >12 años (33.3%; 18/54) y 5-12 años (22.2%; 12/54). La tasa de sepsis fue 4.5/1000 días (19/54, 35.1%). Instalar el CVC en quirófano fue factor protector de riesgo de sepsis (p<0.05; OR 6.97, IC95%: 1.49-35.9), el número de accesos intravenosos fue mayor entre los fallecidos (p<0.05); así también se asociaron con Infección Asociada a Atención en Salud (p<0.05) con 64.8% de casos (35/54); a mayor número de horas mayor riesgo de mortalidad (p<0.05), estancia intrahospitalaria total (p=0.045) y en la Unidad de Cuidados Intensivos Pediátricos (UCIP)(p<0.05). La tasa de mortalidad entre pacientes sometidos a CVC fue 9.25% (5/54), la media del tiempo de supervivencia con CVC fue 328.4 horas (±15.1; IC95%: 298.7-358.04, Mediana: 336 horas); y Media de supervivencia en días fue 107.572 (±7.3; IC95%: 92.2-121.9, Mediana 120 días). El cumplimiento de requisitos de asepsia/antisepsia durante el procedimiento fue protector de sepsis (p<0.05; OR 6.97, IC95%: 1.49-35.9), con 88.9% (48/54) procedimientos realizados con falta o deficiencia de materiales. Conclusión.- La mayor parte de casos son prevenibles, la falta de equipamiento para realizar el procedimiento en condiciones de asepsia es el factor predominante asociado a riesgo de sepsis/mortalidad.


Author(s):  
Martins Toledo de Melo ◽  
Tadeu Miranda de Queiroz
Keyword(s):  
Total N ◽  
Em 12 ◽  

Objetivou-se caracterizar as águas superficiais naturais disponíveis na Terra Indígena Rio Formoso em Tangará da Serra/MT-Brasil, conforme a Resolução 357/2005 do Conselho Nacional de Meio Ambiente (CONAMA), observando a sua possível destinação à proteção das comunidades aquáticas em Terras Indígenas. Foram escolhidas cinco bacias hidrográficas nas quais se identificou um ponto de amostragem próximo ao exutório, cujas coletas foram feitas em 12 campanhas no período de setembro/2016 a agosto de 2017, procurando realizá-las sempre próximo ao dia 15 de cada mês. As amostras foram obtidas seguindo as orientações de coleta e transporte, sendo refrigeradas desde a coleta até a entrega no laboratório onde foram analisadas em no máximo 24 horas. Neste estudo analisou-se 9 variáveis as quais constam na Resolução supracitada, quais sejam: Potencial Hidrogeniônico (pH); Cloreto (Cl); Fósforo total (P); Nitrogênio total (N); Demanda Bioquímica de Oxigênio (DBO); Oxigênio Dissolvido (OD); Sólidos totais (ST); Turbidez (Tu); e Coliforme Termotolerante (CT). Os resultados foram agrupados em dois períodos, sendo um seco (maio a outubro) e outro chuvoso (novembro a abril) e posteriormente foram apresentados pela média e desvio padrão amostral para cada ponto de coleta e período. As variáveis que contribuíram negativamente para os resultados foram: pH, oxigênio dissolvido e coliforme termotolerante. Todos os corpos de água deste estudo estão em desacordo com a Resolução 357/2005 para a classe 1 em pelo menos uma das variáveis avaliadas. A concentração das variáveis Cloretos, Fósforo, Nitrogênio, Demanda Bioquímica de Oxigênio, Sólidos Totais e Turbidez estão dentro dos limites da resolução de referência, se enquadram na Classe 1 e não apresentam limitação à preservação da vida aquática em terra indígena em nenhum dos pontos e períodos.


Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 51
Author(s):  
Vladimír Šimanský ◽  
Elena Aydın ◽  
Ján Horák

Understanding nutrient management is essential to ensure healthy and adequate food production, especially in the context of biochar applied to soil with different soil textures. Additionally, farmers are beginning to understand the importance of nutrient management and there are still several knowledge gaps in this area. Several studies on biochar showed its positive effects, especially in sandy and nutrient-poor soils. There is still a lack of information on the impact of biochar on nutrient regimes in texturally different soils with sufficient nutrient supply and favorable soil chemistry. This study investigates the effect of two biochar substrates (a) biochar blended with farmyard manure (BS1), and (b) biochar blended with farmyard manure and digestate (BS2) applied at rates of 10 and 20 t ha−1 alone or in combination with fertilization on the changes in sorption capacity and nutrient regime of two texturally different soils: (a) sandy Arenosol, and (b) loamy Chernozem, (both in western Slovakia) which have a favorable nutrient content. The results showed that in sandy soil, the BS2 at rate of 20 t ha−1 increased the sum of basic cations (by +112%) and CEC (by +93%) compared to the control. In sandy soil, the content of total P increased by +35 and +16% in BS1 20 t ha–1 and BS2 20 t ha−1, respectively, when compared to the unfertilized control. The content of total P increased by +18% in BS1 20 t ha−1 after fertilization compared to the fertilized control. In loamy soil, the content of total P increased significantly by +53 and +14% in unfertilized treatment BS2 20 t ha−1 and fertilized treatment with BS1 at 20 t ha−1 compared to the respective controls. Available Ca increased in sandy soil by +50 and +53% in fertilized treatments with BS2 at 20 t ha−1 and BS1 at 20 t ha−1, respectively, when compared to fertilized control. In loamy soil, available Mg increased by +13% in fertilized treatment with BS1 applied at 20 t ha−1. In conclusion, BS application at a dose of 20 t ha−1 had a stronger positive effect on soil sorption parameters in sandy soil than the application dose of 10 t ha−1. The same BS application rate significantly increased total P in both soils.


2021 ◽  
Vol 8 (II) ◽  
Author(s):  
Eliseo Sosa-Montes ◽  
Sergio Iban Mendoza-Pedroza ◽  
Luis Angel Huerta-Prado ◽  
Fernando González-Cerón ◽  
Manuel Silva-Luna ◽  
...  

El objetivo de este estudio fue evaluar la composición química de seis gramíneas forrajeras para el trópico húmedo y seco mexicano: Andropogon gayanus, Andropogon gerardii, Cenchrus ciliaris, Chloris gayana, Megathyrsus maximus y Urochloa brizantha. Las muestras se colectaron en noviembre de 2019, en Tonaya, Jalisco, México. Se determinaron: materia seca, cenizas, proteína cruda (total e insoluble), extracto etéreo, fibra detergente neutro, fibra detergente ácido, hemicelulosa, lignina y celulosa. La evaluación se realizó en el Laboratorio de Nutrición Animal del Departamento de Zootecnia, Universidad Autónoma Chapingo, Texcoco, Estado de México. Cada gramínea se evaluó por triplicado y cada repetición se consideró como unidad experimental. Las medias de composición química fueron separadas mediante la prueba de Tukey (p < 0.05). La correlación entre cada par de variables (p < 0.05) se estimó mediante el coeficiente de Pearson (p < 0.05). A mayor porcentaje de proteína total (p < 0.05) menor porcentaje de extracto etéreo y mayores porcentajes de cenizas y de proteína insoluble. Además, a mayor porcentaje de proteína insoluble, menor porcentaje de lignina (p < 0.05). Probablemente, la proteína se concentra en su fracción insoluble a expensas del extracto etéreo y la lignina. Consecuentemente, gran-tallo-azul (Andropogon gerardii) mostró porcentajes altos de proteína total (10.27%) y cenizas (7.88%), y bajos de lignina (5.23%) y extracto etéreo (1.37%); pero su proteína insoluble no fue tan elevada (2.06%) como la de guinea (Megathyrsus maximus) (6.08%). Por tanto, A. gerardii tuvo el mejor contenido nutricional a los 35 días de rebrote. 


2021 ◽  
Vol 13 (12) ◽  
pp. 5831-5846
Author(s):  
Xianjin He ◽  
Laurent Augusto ◽  
Daniel S. Goll ◽  
Bruno Ringeval ◽  
Yingping Wang ◽  
...  

Abstract. Soil represents the largest phosphorus (P) stock in terrestrial ecosystems. Determining the amount of soil P is a critical first step in identifying sites where ecosystem functioning is potentially limited by soil P availability. However, global patterns and predictors of soil total P concentration remain poorly understood. To address this knowledge gap, we constructed a database of total P concentration of 5275 globally distributed (semi-)natural soils from 761 published studies. We quantified the relative importance of 13 soil-forming variables in predicting soil total P concentration and then made further predictions at the global scale using a random forest approach. Soil total P concentration varied significantly among parent material types, soil orders, biomes, and continents and ranged widely from 1.4 to 9630.0 (median 430.0 and mean 570.0) mg kg−1 across the globe. About two-thirds (65 %) of the global variation was accounted for by the 13 variables that we selected, among which soil organic carbon concentration, parent material, mean annual temperature, and soil sand content were the most important ones. While predicted soil total P concentrations increased significantly with latitude, they varied largely among regions with similar latitudes due to regional differences in parent material, topography, and/or climate conditions. Soil P stocks (excluding Antarctica) were estimated to be 26.8 ± 3.1 (mean ± standard deviation) Pg and 62.2 ± 8.9 Pg (1 Pg = 1 × 1015 g) in the topsoil (0–30 cm) and subsoil (30–100 cm), respectively. Our global map of soil total P concentration as well as the underlying drivers of soil total P concentration can be used to constraint Earth system models that represent the P cycle and to inform quantification of global soil P availability. Raw datasets and global maps generated in this study are available at https://doi.org/10.6084/m9.figshare.14583375 (He et al., 2021).


2021 ◽  
Vol 9 ◽  
Author(s):  
Feleke K. Sishu ◽  
Ayele M. Bekele ◽  
Petra Schmitter ◽  
Seifu A. Tilahun ◽  
Tammo S. Steenhuis

Establishing worldwide sustainable and phosphorus efficient cropping systems is urgently needed because the supply of suitable phosphate rock is limited, and excess phosphorus in streams causes eutrophication. One of the impediments in the developing world for sustainable P practices is the lack of studies on P transport and its eventual disposition in the environment. One of these regions with few studies is the Ethiopian Highlands, with permeable volcanic soils. The objective was to establish baseline data on P watershed export in the (sub)humid highlands. Two contrasting watersheds were selected near Lake Tana. For 2 years, stream discharge and sediment, total P, dissolved P, and bioavailable particulate P concentrations were determined at the watershed outlet. The first watershed is the 57 km2 Dangishta, with lava intrusion dikes, forcing subsurface flow through faults to the surface and preventing gully formation. Subsurface flow was half of the 1745 mm annual precipitation, and surface runoff and erosion were minimal. The second watershed is the 9 km2 Robit Bata with 1,420 mm precipitation. The banks of several river banks were slumping. The upper part of the watershed generates saturation excess runoff. A hillslope aquifer in the lower part provided interflow. The average sediment concentrations of 10.5 g L−1 in the stream in Robit Bata (11 times that in Dangishta) reflected the sediments from banks slipping in the stream. The hydrology and the soil loss directly affected the phosphorus export. In Dangishta, the total P concentration averaged 0.5 mg L−1 at the outlet. In Robit Bata, the average total P concentration was 2 mg L−1. The bioavailable particulate P concentration was only twice the concentration in the runoff water. The low phosphorus content of the subsoil slipping in Robit Bata moderated biologically available particulate P at the outlet. Average dissolved P concentrations for both watersheds were around 0.1 mg L−1 in the low range found in temperate climates. It reflects the difference in length of time that phosphorus fertilizers have been applied. Our research concludes that commonly implemented practices such as strengthening river banks and stabilizing gully might not lead to improved water quality in Lake Tana.


Sign in / Sign up

Export Citation Format

Share Document