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008 111005s1991 th uu|m rtt 0| a1eng d
035 _a.b10196043
099 9 _aAIT Thesis no.AE-91-53
100 0 _aTran Thanh Vinh
245 1 0 _aDeveloping a fertilization system for broadcasted rice :
_ba case study in the Central Plain of Vietnam
260 _aBangkok :
_bAsian Institute of Technology,
_c1991
300 _a100 p. +
_e1 online resource
490 1 _aThesis ;
_vno. AE-91-53
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1991
520 _aA fertilizer experiment with broadcasted rice was conducted on degraded soil in Central Plain of Vietnam at the Agricultural Experiment Station, Agricultural University No.2, Hue city, Vietnam in winter-spring season 1991 in order to : - Clarify the relationships between the concentration of various nutrients at different stages of growth and yield together with nutrients concentration of plant at maturity. - On the basis of evaluation of the above relationships to develop methods of quantitative control of nutritional status of young plant by topdressing with fertilizers and hence control of final yield. - To develop preliminary therapy models of N and P. The experiment was 3x3 systematic design including three levels and combinations of N and P. At 5 weeks after broadcasting, half of the plots were topdressed with three levels of N. Application of N increased growth and concentration of N, P. K. Na, Fe and Zn, when applied as basal dressing. Application of P also increased growth and concentration of P, K, Fe, Na, Zn. Preliminary models of diagnosis and yield prognosis were developed. They demonstrate clear relationships between application of nutrients, chemical composition of young plant and final yield. Diagnosis and yield prognosis were expressed quantitatively and could thus he tested by comparing the actual yields with calculated ones.
650 0 _aRice
_xFertilizers
650 0 _aDeepwater rice
_zVietnam
700 1 _aNielsen, J.M.,
_eChairperson
700 0 _aSumitra Poovarodom,
_eExamination Committee
700 1 _aPaudyal, Guna N.,
_eExamination Committee
710 2 _aGovernment of Sweden,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AE-91-53
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B17308
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