Teamkao, Pattrarat

Preferred name

Teamkao, Pattrarat

Alternative Name

Teamkao, P.

Main Affiliation

School of Agricultural Technology

pattrarat.te@kmitl.ac.th

Now showing 1 - 10 of 12

Some of the metrics are blocked by your
consent settings
Effect of arbuscular mycorrhiza and rhizobium on physiology and yield of peanut under drought conditions
(2024-01-01)
Aninbon, Chorkaew
;
Teamkao, Pattrarat
;
Buram, Kiattisak
;
Kaewnoo, Tipawan
;
Ruttanaprasert, Ruttanachira
Drought is the one primary issue limiting peanut growth and productivity. The study aimed to investigate the effects of arbuscular mycorrhizal fungi (AMF), rhizobium (Rhi), and their combinations on phenolic content, proline content, growth, and yield of peanut under different soil water regimes. The pot experiments were carried out for two growing seasons under greenhouse conditions and designed based on a 2×3 factorial in randomized complete block design (RCBD) with four replications. Factor A comprised two soil water regimes: field capacity (FC) and 1/3 available soil water (1/3 AW), whereas factor B included three different types of microorganisms: (i) uninoculated control, (ii) arbuscular mycorrhiza (AMF), and (iii) a combination of AMF and rhizobium (Rhi) inoculations. Data were collected for growth, proline content, phenolic content, yield, and yield components. Drought stress significantly reduced in relative water content, leaf area, biomass, yield, and yield components of peanut, whereas leaf phenolic content was increased under drought stress. Higher pod dry weight was achieved under FC conditions (28.87 g plant-1), and it was reduced to 16.06 g plant-1 under 1/3 FC. Interestingly, AMF+Rhi synergistically increased the leaf area compared with non-incubated peanut under 1/3 FC conditions. AMF-inoculated peanut tended to increase biomass, while the combination of AMF+Rhi tended to have higher yield components compared with uninoculated control, especially for the weight of 100 seeds.
Some of the metrics are blocked by your
consent settings
Comparison of bioremediation and phytoremediation in treatment of diethylene glycol from stationery industry
(2017-01-01)
Teamkao, Pattrarat
;
Techkarnjanaruk, Somkiet
;
Kullavanijaya, Pratin
;
Thiravetyan, Paitip
Diethylene glycol (DEG) was found to contaminate wastewater from the stationery industry. The wastewater, after chemical precipitation, still had high DEG and Chemical oxygen demand (COD) resulting in undischarge according to the standard wastewater policy. Bioremediation and phytoremediation were chosen to solve this problem. Comparison of bioremediation and phytoremediation revealed that adding nutrient rich microorganisms removed more DEG, but less COD than using plants grown under hydroponic conditions. However, the bioremediation system had lower potential than plant + soil conditions. The application of a plant-soil system as a constructed wetland was able to remove all DEG (1,500 mg/L) in the wastewater within 8 d. The potential of a constructed wetland system can be enhanced by the addition of microorganisms and nutrients, reducing the time of remediation from 8 to 5 d. In addition, COD reduction to 110 mg/L was reduced from 14 to 11 d, which was lower than the acceptable level (COD ≤ 120 mg/L). However, the use of microorganisms alone cannot reduce COD in contaminated wastewater to the acceptable level. Using constructed wetland with the addition of microorganisms and nutrients is an effective way to remediate DEG and COD from stationery industry wastewater.
Some of the metrics are blocked by your
consent settings
The effect of different planting materials ratios on the growth of foliage plants
(2021-11-01)
Kosinwattana, S.
;
Anuwong, C.
;
Chatchana, T.
;
Boonauan, P.
;
Teamkao, P.
Growing foliage plants in the containers using soil-based growing media poroved to be a good alternative for the home garden, especially where land is limited. The results revealed that the plant height, the leaf number, the leaf width, and the leaf length of five types of plants in the growing media mixtures of leaf compost: Coconut husk chips: Coconut coir: Sand ratio 2:1:1:1 were higher than other treatments. Therefore, it could suitable use for planting media to reduce the production cost of foliage plants.
Some of the metrics are blocked by your
consent settings
Floods increase soil microbial activity in paddy soil: A case study in Sakon Nakhon province, Thailand
(2020-01-01)
Teamkao, P.
;
Lapontun, K.
;
Onkum, P.
;
Chudaeng, D.
;
Saipluemchit, S.
The results showed that the different flooding histories caused the effects on some soil properties. Partially flooded areas had the highest soil electrical conductivity at 0.06 mS/cm, but in the range that did not affect plant growth. All studied areas had low levels of organic matter and fields had available phosphorus of less than 4 mg/kg. There was a low level of exchangable potassium under fully flooded areas but a high level under partially flooded and non-flooded areas. The microbial activity revealed the highest soil respiration under fully flooded areas with 0.16 mgCO2/g soil. The highest bacterial and fungal populations, FDA activity, urease, dehydrogenase, and protease activities were found under fully flooded area conditions. However, soil pH, microbial biomass carbon, microbial biomass nitrogen, and acidphosphatase activity were not statistically different. No pesticides in carbamate, organochloride, and organophosphate groups were observed. The amounts of mercury, arsenic, lead, and cadmium were lower than the standard set of Thailand. Flooding did not reduce soil quality in the areas of the study; on the other hand, increased microbial activities were beneficial for plant growth. The effects of flooding on soil properties might differ depending on the conditions in each area.
Some of the metrics are blocked by your
consent settings
Effects of soil moisture content and arbuscular mycorrhizal fungi on phosphorus fractions in soil
(2020-01-01)
Chudaeng, D.
;
Teamkao, P.
The results of the investigation showed that soil moisture significantly affected Pwater, P-loosely, P-Fe and P-apatite. P-loosely and P-apatite contents were higher than the control, while P-water and P-Fe contents were high at 75% of soil water holding capacity (WHC) after 90 days of experiment. Arbuscular mycorrhizal fungi (Glomus sp. and Acaulospora sp.) inoculation significantly differed in P-Al, P-Ca and P-apatite contents. AMF inoculation reduced amounts of P-Al, P-Ca and P-apatite in soil. Interaction between soil moisture and AMF significantly differed in P-loosely and P-apatite with. P-Fe, P-Ca and P-apatite increased while P-water, P-loosely and P-Al decreased. It showed that drought stress reduced P-water content, while AMF addition reduced unavailable phosphorus forms of P-Al, P-Ca and P-apatite in soil.
Some of the metrics are blocked by your
consent settings
Phosphorus removal from domestic wastewater by Nelumbo nucifera Gaertn. and Cyperus alternifolius L.
(2014-05-01)
Thongtha, S.
;
Teamkao, P.
;
Boonapatcharoen, N.
;
Tripetchkul, S.
;
Techkarnjararuk, S.
Domestic wastewater is a source of phosphorus contamination that causes eutrophication when it contaminates aquatic environments. Nelumbo nucifera Gaertn. and Cyperus alternifolius L. were applied for phosphorus removal from domestic wastewater. From the study, phosphorus in domestic wastewater was removed from the initial concentration of 1.038±0.001mgL-1 to 0.094±0.001 and 0.048±0.004mgL-1 by N.nucifera and C.alternifolius, respectively, within 5 days. In addition, total Kjeldahl nitrogen (TKN) and chemical oxygen demand (COD) also decreased when wetland systems were applied the same as treatment with conventional method (chemical+activated sludge process). However, the plant removed TDS better than the conventional method. During 5 cycles of exposure, the two plants still survived and were healthy. The weight of plants increased after the experiment from 4060±0.05g to 4820±0.17g of N.nucifera, and from 4000±0.00g to 4600±0.14g of C.alternifolius. Phosphorus content also increased in both plants after the experiment. However, in the wetland system, phosphorus was removed mainly by the soil, followed by the plants, and then microorganisms. The domain group in the microbial community of both wetland systems was Pseudomas sp. •Domestic wastewater treatment by Nelumbo nucifera and Cyperus alternifolius is possible. © 2014 Elsevier Ltd.
Some of the metrics are blocked by your
consent settings
Effect of organic fertilizer rates on grain yield and seed qualities of rice
(2024-05-01)
Kaewtaphan, P.
;
Maniin, P.
;
Nilkong, P.
;
Aninbon, C.
;
Teamkao, P.
The effect of organic fertilizer quantity on the yield and seed qualities of Pathumthani 1 rice revealed that the highest grain yield, 3,893 kg/ha, was attained with the application of 2.24 kg N/ha of organic fertilizer, whereas rice without fertilizer exhibited the lowest yield. However, the application of 1.6 kg N/ha of organic fertilizer resulted in the highest seed germination rate, germination index, and pure seed percentage, with values of 98.00%, 32.43, and 99.71%, respectively. Conversely, applying 2.24 kg N/ha of organic fertilizer yielded the lowest seed germination rate, germination index, and pure seed percentage at 87.50%, 28.74, and 98.11%, respectively. Moreover, the 1.6 kg N/ha rate demonstrated the least inert matter and the lowest number of dead seeds. Consequently, the findings suggested that organic fertilizer should be applied at a rate of 2.24 kg N/ha to achieve high grain yields, while it is still maintained seed germination percentage of over 80%.
Some of the metrics are blocked by your
consent settings
Possible mechanism of gallium bioleaching from gallium nitride (GAN) by Arthrobacter creatinolyticus: Role of amino acids/peptides/proteins bindings with gallium
(2016-09-01)
Maneesuwannarat, Sirikan
;
Teamkao, Pattrarat
;
Vangnai, Alisa S.
;
Yamashita, Mitsuo
;
Thiravetyan, Paitip
The objectives of this work were to screen and characterize heterotrophic bacteria for gallium nitride (GaN) leaching; and to study the involved mechanism of bacterial leaching of Ga from GaN. Ga in the form of GaN has been extensively used as a semiconductor substrate material. The advantage of bioleaching for gallium recovery is the fact that it is a safer, environmentally-friendly method and includes energy-saving processes, which can leach metals at relatively low concentrations. Three bacterial isolates were isolated from cadmium-, and arsenic-contaminated soil in the presence of GaN. NKS4 showed the highest efficiency in Ga leaching at approximately 18% after 15 days, and the system pH was 9. The analysis of 16S rDNA sequences indicated that strain NKS4 was characterized and identified as Arthrobacter creatinolyticus (A. creatinolyticus). Further investigation revealed that the ability of Ga leaching from GaN by this bacterium involved amino acids. Fourier transform infrared spectroscopy (FTIR) was used to investigate the interaction of Ga and amino acids/peptides/proteins which were secreted from this bacteria.
Some of the metrics are blocked by your
consent settings
Soil microbial activities in Alfisol with different green manure application
(2020-01-01)
Onkum, P.
;
Teamkao, P.
The result showed the highest soil respiration in green manure from African sesbania application was 0.5478 mgCO2/g soil. The lowest microbial biomass nitrogen (MBN) found in green manure from cowpea application was 29.68 mgCO2/g soil. MBN was found at the highest value in non-application of green manure (control) at 2.20 ng/g soil after 30 days application. Urease activity was the highest in green manure from African sesbania at 12.58 μg NH4-N/g dwt. However, activities of cellulase, protease and acid-phosphatase were not statistically differed between treatments. Enzymatic activities increased with the highest activities found at 20th and 30th days after application. The green manure from Soybean promoted the highest microbial biomass while green manure from jack bean promoted the highest soil respiration. The enzymes were changed, except for urease. Decomposition rate related to plant quality to control activity in soil.
Some of the metrics are blocked by your
consent settings
Composting of boiler-ash and biogas-sludge from the palm oil industry for using as plantlet growing media
(2022-05-01)
Youngmanee, K.
;
Teamkao, P.
Agricultural organic waste is increasing yearly. In Thailand, the palm oil industry generates high amounts of waste 13.71 million ton/year, mainly as boiler-ash and biogas-sludge. This study focused on the basic properties of boiler-ash and biogas-sludge from the palm oil industry after composting and their possible use as growing media for lettuce. Boiler-ash and biogas-sludge from the palm oil industry were pre-treated (composting) and after that evaluated as growing media in comparison with peatmoss under pot experiment conditions. Under the pre-treatment experiment, the results showed that the type of materials affected the pH, EC, OM, total N and the C:N ratio (P<0.05). The pre-treatment method was affected the pH and EC (P<0.05). The type of growing media and porous materials affected germination percentage, germination index, shoot length, and shoot fresh and dry weight (P<0.01). Interaction between the type of treated materials and porous materials affected germination percentage, germination index, shoot length, root length, and shoot fresh and dry weight (P<0.05). The best material was boiler-ash compost with perlite as the porous material which gave 92.6% germination, 23.05 germination index, 39.10 mm in shoot length, 28.67 mm in root length, 0.2 g shoot fw/plant, and 0.0397 g shoot dw/plant but these results were not statistically different from undisturbed boiler-ash with perlite as the porous material. Therefore, boiler-ash compost and boiler-ash left for 90 days were recommended to use as growing media.

Teamkao, Pattrarat

Filters

Settings

Sort By

Results per page