Survey on the nutritional status of paddy in Bangkok plain | |
| Author | Chalong Buaphan |
| Call Number | AIT Thesis no.AE-78-03 |
| Subject(s) | Rice--Thailand--Bangkok Plants--Nutrition Plants--Chemical analysis |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | A survey was done from 15th October to 30th October 1977, during the wet season around Bangkok plain in order to evaluate the nutritional status of the paddy plant. The chemical composition in the aerial parts of the plant was determined for the samples collected at different stages of growth during that period. In order to find the concentration of N, P and K at a fixed dry matter weight level of 3 gm, and to predict the yield based on this chemical composition, previously developed correction, diagnosis and prognosis models for this area in a AIT-Kasetsart University - DANIDA joint project were used. During the dry season from April to August 1978, the chemical composition of the young plants was determined within 30 days after transplanting. By finding the concentration of N, P and K at 3 gm DMw and by using the therapy models developed in above project, top-dressing of N and P was done in order to find the reliability and applicability of those models in farmers' field. Also chemical composition of the young plants was determined 2 weeks after top-dressing in order to examine the effect of top-dressing on chemical composition of the young plants and to predict the effect on yield. This study has clearly shown that N and P are the predominant nutrients largely determining the yield in these areas. In the survey carried out, it was found that the concentration in young rice plants of N ranged from 0.9 to 6.2%, P ranged from 0.10 to 0.41% and K ranged from 0.8 to 4,0%. The average values of the concentration of N, P and K were 3.5%, 0.27% and 2.6% respectively. The average values of other nutrients were: 0.26% Na, 0.18% Ca, 0.16% Mg, 919 ppm Fe, 582 ppm Mn, 38 ppm Zn, 6 ppm Cu and 957 ppm Al. A high correlation coefficient (r > 0.8) which was highly significant (P < 0.005) was found between the predicted yield and actual yield. This clearly shows the high reliability and applicability of the models developed for paddy in the AIT-Kasetsart University - DANIDA project and their possible use in farmers' field for quantitative control of paddy production in Bangkok plain. |
| Year | 1978 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Nielsen, Jens Moller |
| Examination Committee(s) | Apichart Anukularmphai ;Paiboon Prabuddham |
| Scholarship Donor(s) | 3M Company |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1978 |