Phakamas, Nittaya

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Phakamas, Nittaya
Alternative Name
Phakamas, N.
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Email
nittaya.ph@kmitl.ac.th

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    Item type:Publication,
    Effects of urea and sunn hemp on nitrogen use efficiency and physiological traits related to Japonica rice yield
    (2023-05-01)
    Khemtong, J.
    ;
    Phakamas, N.
    ;
    Somchit, P.
    Application of sunn hemp as a sole fertilizer could provide nitrogen use efficiency (NUE), tiller number, leaf area index (LAI), crop growth rate (CGR), biomass and grain yield higher than application of urea as a sole fertilizer. Correlation coefficients (r) among some physiological traits including LAI, CGR, NUE, NUE for grain yield (NUEg) and agronomic traits consisting of tiller number, biomass and grain yield were significantly positive resulted which ranged between 0.65 and 1.00. The results indicated that application of sunn hemp as green manure can promote growth and yield of Japonica rice and tend to be a good choice for supplying nitrogen in Japonica rice production.
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    Effects of calcium sources on physiological traits related to pod and seed yield of peanut
    (2022-01-01)
    Inban, N.
    ;
    Somchit, P.
    ;
    Phakamas, N.
    Gypsum is an important calcium source in peanut production system as calcium is required for pod and seed filling to attain acceptable pod yield. Other sources of calcium may be used as gypsum substitutes in case they are available at low cost or free available. Calcium sources were significantly different for crop growth rate (CGR), pod growth rate (PGR), total dry matter at 65 and 92 DAP, and seed yield at harvest. Crop growth rate during planting to 65 DAP was significantly related to pod yield with R<sup>2</sup>=0.56<sup>∗∗</sup>. Pod growth rates during 65 to 92 DAP and 92 to 125 DAP were significantly related to pod yield with R<sup>2</sup>= 0.35<sup>∗∗</sup>and 0.54<sup>∗∗</sup>, and also related to seed yield with R<sup>2</sup>= 0.29<sup>∗</sup>and 0.57<sup>∗∗</sup>, respectively.
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    Influence of calcium from different seashells on growth and yield of Khon Kaen 6 peanut cultivar
    (2023-11-01)
    Hongyotee, T.
    ;
    Somchit, P.
    ;
    Phakamas, N.
    Application of all calcium sources increased biomass and crop growth rate of peanut. Significantly increasing in biomass was found in the crop threated with gypsum. The crop growth rate was significantly increased in the crop treated with gypsum, mussel and clams. Application of calcium sources was not significantly affected on yield and yield components of peanut. The possibility to used seashells as an alternative calcium source for peanut production.
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    Possibility to use crop models for indirect prediction of glycemic index in rice
    (2024-01-01)
    Phopaijit, S.
    ;
    Somchit, P.
    ;
    Phakamas, N.
    A process for constructing the prediction equations was developed by using simulated biomass and simulated grain yield to be estimating the glycemic index (GI) of two rice varieties, and reference GI was used as a basis for calculation of predicted GI. The CSM-CERES-Rice model was able to construct the best prediction equations, and the equation developed by using simulated biomass and simulated yield were y = 0.0003x + 59.099 and y = 0.0008x + 59.213, respectively. The equations were also used for prediction of GI values of two rice varieties applied with different methods of nitrogen application. The difference of the equations was 0.0% for both simulated biomass and simulated grain yield. The process for indirect prediction of GI is used available simulated data of biomass and grain yield to improve prediction accuracy.