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    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 chicken manure and chemical fertilizer on Growth and Yield of Japonica Rice
    (2022-01-01)
    Phopaijit, S.
    ;
    Suraphonphinit, A.
    ;
    Phakamas, N.
    Organic and inorganic nitrogen fertilizers are normally used in Indica rice (Oryza sativa L.) production system, but information on the effects of chicken manure on Japonica rice is limited. The effects of chicken manure and chemical fertilizers on growth and yield of Japonica rice were determined. Rice varieties were significantly different for most traits including plant height, crop growth rate (CGR), biomass, percentage of filled and unfilled grain, number of grains per spikelet and harvest index (HI), except for grain yield. Chemical fertilizer had the highest grain yield followed by chicken manure, non-treated control and chemical fertilizer together with chicken manure, respectively. The interaction effects between fertilizer treatment and rice variety were not significant for all characters. These rice varieties seemed to better respond to chemical fertilizer than chicken manure treatments.
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    Effects of different compost manures application on growth of lettuces (Lactuca sativa L.)
    (2020-09-01)
    Suwor, Patcheraporn
    ;
    Jeakkhajorn, S.
    ;
    Kramchote, S.
    The results showed that the difference of livestock manures showed differences in nutrients and amount. The composted chicken manures contained the highest nutrients and showed an optimum C/N ratio, in which the value was less than 1/20. Three lettuces (green oak, fillice iceberg, and green cos) were treated by different compost manures and they were a response to the compost manures in a similar trend. The three lettuce types grew after the application of chicken compost manure had higher on plant height, plant width, leaf length, leaf width, leaf number per plant, SPAD unit, root length, and plant fresh weight as well as chemical fertilizer. On the other hand, the three lettuces grown after the application of cow, goat compost manures, and bio-fermented fertilizer had the lowest of plant growth similar to control (without fertilizer). The results suggested that the chicken manure compost is suitable for lettuce production.
      2
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    Release of various elements from organic fertilizers incubated in organic and non-organic paddy soils at various time periods
    (2019-01-01)
    Surin, Patcharin
    ;
    Supsuan, Phasini
    ;
    Yampracha, Sukunya
    Organic fertilizers often contain numerous elements beside nitrogen (N) such as phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sodium (Na). In general, the application rates of organic fertilizer are based on N requirement which could result in extra amount of other elements i. e. P and Na which could negatively impact on environment. This study aimed to investigate the release of P, K, Ca, Mg, and Na using a batch technique from three organic fertilizers (e. g. cow manure, compost and sunn hemp) incubated in two paddy soils at various time periods (e.g. 0, 3, 5, 7, 14, 21, 28, 42, 56, 70, 98 and 120 days). A 2×4 factorial in completely randomized experimental design with three replications was employed. A factor A was type of paddy field (an organic paddy field (SO), and non-organic paddy field (SC)) and a factor B was four different organic fertilizers application type (control, cow manure compost and sunn hemp). Soil samples were collected to analyze soil pH, electrical conductivity, available P (Bray II), exchangeable K, Ca, and Mg and extractable Na at the end of each incubation time period. Results showed that the incubation time period did not play a role on the release of P, K, Ca, Mg and Na in soils. Release of P, K, Ca, Mg, and Na in SC was higher than SO. Release of P, K, and Na were highest in cow manure, while compost gave higher release of Ca and Mg. Electrical conductivity did not exceed safety levels with all treatments less than 0.50 mS/cm.